View Filing Data

Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2013	Apr. 15, 2013
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Trading Symbol	UAL
Entity Registrant Name	United Continental Holdings, Inc.
Entity Central Index Key	0000100517
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		333,937,517
United Airlines, Inc.
Document Information [Line Items]
Entity Registrant Name	United Airlines, Inc.
Entity Central Index Key	0000319687
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		1,000

Statements of Consolidated Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating revenue:
Passenger - Mainline	$ 5,938	$ 5,954
Passenger - Regional	1,621	1,554
Total passenger revenue	7,559	7,508
Cargo	227	264
Other operating revenue	935	830
Total revenue	8,721	8,602
Operating expense:
Aircraft fuel	3,050	3,229
Salaries and related costs	2,127	1,897
Regional capacity purchase	588	616
Landing fees and other rent	497	469
Aircraft maintenance materials and outside repairs	438	407
Depreciation and amortization	408	380
Distribution expenses	328	337
Aircraft rent	240	251
Special charges	92	164
Other operating expenses	1,217	1,123
Total operating expenses	8,985	8,873
Operating loss	(264)	(271)
Nonoperating income (expense):
Interest expense	(201)	(216)
Interest capitalized	11	8
Interest income	5	5
Miscellaneous, net	23	27
Total other income (expense)	(162)	(176)
Loss before income taxes	(426)	(447)
Income tax expense (benefit)	(9)	1
Net loss	$ (417)	$ (448)
Loss per share, basic and diluted	$ (1.26)	$ (1.36)
United Airlines, Inc.
Operating revenue:
Passenger - Mainline	$ 5,938	$ 5,954
Passenger - Regional	1,621	1,554
Total passenger revenue	7,559	7,508
Cargo	227	264
Other operating revenue	937	832
Total revenue	8,723	8,604
Operating expense:
Aircraft fuel	3,050	3,229
Salaries and related costs	2,127	1,897
Regional capacity purchase	588	616
Landing fees and other rent	497	469
Aircraft maintenance materials and outside repairs	438	407
Depreciation and amortization	408	380
Distribution expenses	328	337
Aircraft rent	240	251
Special charges	92	164
Other operating expenses	1,217	1,122
Total operating expenses	8,985	8,872
Operating loss	(262)	(268)
Nonoperating income (expense):
Interest expense	(203)	(217)
Interest capitalized	11	8
Interest income	5	5
Miscellaneous, net	85	42
Total other income (expense)	(102)	(162)
Loss before income taxes	(364)	(430)
Income tax expense (benefit)	(2)	1
Net loss	$ (362)	$ (431)

Statements of Consolidated Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net loss	$ (417)	$ (448)
Other comprehensive income, net:
Net change related to fuel derivative financial instruments		124
Net change related to employee benefit plans	21	4
Net change related to investments and other	(2)	9
Comprehensive income (loss) adjustments, before tax	19	137
Total comprehensive loss, net	(398)	(311)
United Airlines, Inc.
Net loss	(362)	(431)
Other comprehensive income, net:
Net change related to fuel derivative financial instruments		124
Net change related to employee benefit plans	21	4
Net change related to investments and other	(1)	10
Other	6
Comprehensive income (loss) adjustments, before tax	26	138
Total comprehensive loss, net	$ (336)	$ (293)

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Net Income
-URI http://asc.fasb.org/extlink&oid=6518256

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-Name Accounting Standards Codification
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-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

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-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Other Comprehensive Income
-URI http://asc.fasb.org/extlink&oid=6519514

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-Name Accounting Standards Codification
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-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 130
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-Name Accounting Research Bulletin (ARB)
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-Appendix A

Reference 12: http://www.xbrl.org/2003/role/presentationRef
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-Name Emerging Issues Task Force (EITF)
-Number 87-21
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Research Bulletin (ARB)
-Number 51
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Reference 15: http://www.xbrl.org/2003/role/presentationRef
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Reference 16: http://www.xbrl.org/2003/role/presentationRef
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-Paragraph 20
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+ Details

Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 3,538	$ 4,770
Short-term investments	1,852	1,773
Total unrestricted cash, cash equivalents and short-term investments	5,390	6,543
Restricted cash	50	65
Receivables, less allowance for doubtful accounts	1,679	1,338
Aircraft fuel, spare parts and supplies, less obsolescence allowance	690	695
Deferred income taxes	494	543
Prepaid expenses and other	845	865
Total current assets	9,148	10,049
Operating property and equipment: Owned-
Flight equipment	17,888	17,561
Other property and equipment	3,357	3,269
Operating property and equipment - owned, gross	21,245	20,830
Less - Accumulated depreciation and amortization	(5,305)	(5,006)
Operating property and equipment - owned, net	15,940	15,824
Purchase deposits for flight equipment	534	462
Capital leases-
Flight equipment	1,475	1,484
Other property and equipment	235	235
Operating property and equipment - capital leases, gross	1,710	1,719
Less - Accumulated amortization	(747)	(713)
Operating property and equipment - capital leases, net	963	1,006
Total property, plant, and equipment, net	17,437	17,292
Other assets:
Goodwill	4,523	4,523
Intangibles, less accumulated amortization	4,561	4,597
Restricted cash	385	382
Other, net	788	785
Other assets total	10,257	10,287
Total assets	36,842	37,628
Current liabilities:
Advance ticket sales	4,633	3,360
Frequent flyer deferred revenue	2,312	2,364
Accounts payable	2,293	2,312
Accrued salaries and benefits	1,455	1,763
Current maturities of long-term debt	1,079	1,812
Current maturities of capital leases	121	122
Other	999	1,085
Total current liabilities	12,892	12,818
Long-term debt	10,182	10,440
Long-term obligations under capital leases	765	792
Other liabilities and deferred credits:
Frequent flyer deferred revenue	2,755	2,756
Postretirement benefit liability	2,632	2,614
Pension liability	2,385	2,400
Advanced purchase of miles	1,488	1,537
Deferred income taxes	1,485	1,543
Lease fair value adjustment, net	836	881
Other	1,328	1,366
Total non-current liabilities	12,909	13,097
Commitments and contingencies
Stockholder's equity:
Preferred stock
Common stock	3	3
Additional capital invested	7,159	7,145
Accumulated deficit	(6,003)	(5,586)
Stock held in treasury, at cost	(38)	(35)
Accumulated other comprehensive loss	(1,027)	(1,046)
Total stockholders' equity	94	481
Total liabilities and stockholders' equity (deficit)	36,842	37,628
United Airlines, Inc.
Current assets:
Cash and cash equivalents	3,532	4,765
Short-term investments	1,852	1,773
Total unrestricted cash, cash equivalents and short-term investments	5,384	6,538
Restricted cash	50	65
Receivables from related parties	229	226
Receivables, less allowance for doubtful accounts	1,679	1,338
Aircraft fuel, spare parts and supplies, less obsolescence allowance	690	695
Deferred income taxes	499	546
Prepaid expenses and other	841	841
Total current assets	9,372	10,249
Operating property and equipment: Owned-
Flight equipment	17,888	17,561
Other property and equipment	3,357	3,269
Operating property and equipment - owned, gross	21,245	20,830
Less - Accumulated depreciation and amortization	(5,305)	(5,006)
Operating property and equipment - owned, net	15,940	15,824
Purchase deposits for flight equipment	534	462
Capital leases-
Flight equipment	1,475	1,484
Other property and equipment	235	235
Operating property and equipment - capital leases, gross	1,710	1,719
Less - Accumulated amortization	(747)	(713)
Operating property and equipment - capital leases, net	963	1,006
Total property, plant, and equipment, net	17,437	17,292
Other assets:
Goodwill	4,523	4,523
Intangibles, less accumulated amortization	4,561	4,597
Restricted cash	385	382
Other, net	1,200	1,052
Other assets total	10,669	10,554
Total assets	37,478	38,095
Current liabilities:
Advance ticket sales	4,633	3,360
Frequent flyer deferred revenue	2,312	2,364
Accounts payable	2,296	2,316
Accrued salaries and benefits	1,455	1,763
Current maturities of long-term debt	1,079	1,812
Current maturities of capital leases	121	122
Payables to related parties	73	75
Other	1,073	1,140
Total current liabilities	13,042	12,952
Long-term debt	9,783	10,038
Long-term obligations under capital leases	765	792
Other liabilities and deferred credits:
Frequent flyer deferred revenue	2,755	2,756
Postretirement benefit liability	2,632	2,614
Pension liability	2,385	2,400
Advanced purchase of miles	1,488	1,537
Deferred income taxes	1,415	1,470
Lease fair value adjustment, net	836	881
Other	1,537	1,494
Total non-current liabilities	13,048	13,152
Commitments and contingencies
Stockholder's equity:
Additional capital invested	7,625	7,611
Accumulated deficit	(5,758)	(5,397)
Accumulated other comprehensive loss	(1,027)	(1,053)
Total stockholders' equity	840	1,161
Total liabilities and stockholders' equity (deficit)	$ 37,478	$ 38,095

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Receivables, allowance for doubtful accounts	$ 20	$ 13
Aircraft fuel, spare parts and supplies, obsolescence allowance	136	125
Intangibles, accumulated amortization	$ 828	$ 792
Common stock, par value	$ 0.01	$ 0.01
Common shares, authorized	1,000,000,000	1,000,000,000
Common shares, outstanding	333,851,337	332,472,779
United Airlines, Inc.
Receivables, allowance for doubtful accounts	$ 20	$ 13
Aircraft fuel, spare parts and supplies, obsolescence allowance	136	125
Intangibles, accumulated amortization	$ 828	$ 792
Common stock, par value	$ 0.01	$ 0.01
Common shares, authorized	1,000	1,000
Common shares, issued	1,000	1,000
Common shares, outstanding	1,000	1,000

Statements of Consolidated Cash Flows - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Cash Flows from Operating Activities:
Net cash provided by operating activities	$ 393	$ 124
Cash Flows from Investing Activities:
Capital expenditures and aircraft purchase deposits paid	(375)	(301)
Increase in short-term and other investments, net	(77)	(148)
Proceeds from sale of property and equipment	9	89
(Increase) decrease in restricted cash, net	12	(2)
Net cash used in investing activities	(431)	(362)
Cash Flows from Financing Activities:
Payments of long-term debt	(1,241)	(479)
Proceeds from issuance of long-term debt	109	86
Principal payments under capital leases	(29)	(23)
Other, net	(33)	14
Net cash used in financing activities	(1,194)	(402)
Net decrease in cash and cash equivalents during the period	(1,232)	(640)
Cash and cash equivalents at beginning of the period	4,770	6,246	$ 6,246
Cash and cash equivalents at end of the period	3,538	5,606	4,770
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through the issuance of debt	146	136
Airport construction financing	5	16
United Airlines, Inc.
Cash Flows from Operating Activities:
Net cash provided by operating activities	389	124
Cash Flows from Investing Activities:
Capital expenditures and aircraft purchase deposits paid	(375)	(301)
Increase in short-term and other investments, net	(77)	(148)
Proceeds from sale of property and equipment	9	89
(Increase) decrease in restricted cash, net	12	(2)
Net cash used in investing activities	(431)	(362)
Cash Flows from Financing Activities:
Payments of long-term debt	(1,241)	(479)
Proceeds from issuance of long-term debt	109	86
Principal payments under capital leases	(29)	(23)
Other, net	(30)	14
Net cash used in financing activities	(1,191)	(402)
Net decrease in cash and cash equivalents during the period	(1,233)	(640)
Cash and cash equivalents at beginning of the period	4,765	6,240	6,240
Cash and cash equivalents at end of the period	3,532	5,600	$ 4,765
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through the issuance of debt	146	136
Airport construction financing	$ 5	$ 16

Frequent Flyer Accounting

3 Months Ended

Mar. 31, 2013

Frequent Flyer Accounting

NOTE 1—FREQUENT FLYER ACCOUNTING

Frequent Flyer Awards. The Company revised the estimated selling price of miles as a prospective change in estimate, effective January 1, 2012, based on the price at which the Company sells miles to Star Alliance partners in its reciprocal frequent flyer agreements as the best estimate of the selling price for these miles. Any changes to the composition of Star Alliance airline partners may result in the existing estimated selling price of air transportation miles no longer being representative of the best estimate of the selling price and could result in a change to the amount and method we use to determine the estimated selling price. On February 14, 2013, US Airways announced an agreement to merge with AMR Corporation and its intent to exit Star Alliance as a result of such merger. We are currently evaluating the potential impact of any changes to the estimated selling price of miles as a result of this merger.

New Accounting Pronouncements

3 Months Ended

Mar. 31, 2013

New Accounting Pronouncements

NOTE 2—NEW ACCOUNTING PRONOUNCEMENTS

In February 2013, the Financial Accounting Standards Board issued Accounting Standards Update No. 2013-02 (“ASU 2013-02”), Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. Some of the key amendments require the Company to present, either on the face of the statement of operations or in the notes, the effects on the line items of net income of significant amounts reclassified out of accumulated other comprehensive, but only if the amount reclassified is required under U.S. GAAP to be reclassified to net income in its entirety in the same reporting period. For amounts that are not required to be reclassified in their entirety to net income, the Company is required to cross-reference to other disclosures that provide additional detail about those amounts. ASU 2013-02 became effective for the Company’s annual and interim periods beginning January 1, 2013, and the required disclosures are included in Note 11 of this report.

- Definition

The entire disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Direct Effects of a Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6510796

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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6507316

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-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Glossary Indirect Effects of a Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6515603

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-Name Accounting Standards Codification
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-Subparagraph (SX 210.10-01.(b)(6))
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-Paragraph b
-Subparagraph 6
-Article 10

+ Details

Loss Per Share

3 Months Ended

Mar. 31, 2013

Loss Per Share

NOTE 3—LOSS PER SHARE

The table below represents the computation of UAL’s basic and diluted loss per share amounts and the number of securities that have been excluded from the computation of diluted loss per share amounts because they were antidilutive (in millions, except per share amounts):


	Three Months Ended March 31,
	2013			2012
Basic and diluted loss per share:
Loss available to common stockholders	$	(417	)	$	(448	)

Weighted average shares outstanding, basic and diluted		332			330

Loss per share, basic and diluted	$	(1.26	)	$	(1.36	)

Potentially dilutive shares excluded from diluted per share amounts:
Restricted stock and stock options		4			7
4.5% senior limited-subordination convertible notes		5			5
4.5% convertible notes		12			12
6% convertible junior subordinated debentures		4			4
6% senior convertible notes		40			40

Income Taxes

3 Months Ended

Mar. 31, 2013

Income Taxes

NOTE 4—INCOME TAXES

Our effective tax rates are lower than the federal statutory rate of 35% primarily because of the impact of changes to existing valuation allowances. We continue to provide a valuation allowance for our deferred tax assets in excess of deferred tax liabilities because we have concluded that it is more likely than not that such deferred tax assets will ultimately not be realized.

United files a consolidated federal income tax return with UAL. Under an intercompany tax allocation policy, United computes, records and pays UAL for its own tax liability as if United were a separate company filing a separate return. In determining its own tax liabilities, United takes into account all tax credits or benefits generated and utilized as a separate company and it is compensated for the aforementioned tax benefits only if it would be able to use those benefits on a separate company basis.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Publisher FASB
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-Number 109
-Paragraph 136, 172
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 43, 44, 45, 46, 47, 48, 49
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Employee Benefit Plans

3 Months Ended

Mar. 31, 2013

Employee Benefit Plans

NOTE 5—EMPLOYEE BENEFIT PLANS

Defined Benefit Pension and Other Postretirement Benefit Plans. The Company’s net periodic benefit cost includes the following components (in millions):


	Pension Benefits						Other Postretirement Benefits
	Three Months Ended March 31,						Three Months Ended March 31,
	2013			2012			2013			2012
Service cost	$	33		$	25		$	14		$	13
Interest cost		47			46			28			31
Expected return on plan assets		(40	)		(35	)		(1	)		(1	)
Amortization of unrecognized (gain) loss and prior service cost		18			5			3			(1	)

Net periodic benefit costs	$	58		$	41		$	44		$	42

During the three months ended March 31, 2013, the Company contributed $41 million to its tax-qualified defined benefit pension plans.

Share-Based Compensation. In February 2013, UAL granted share-based compensation awards pursuant to the United Continental Holdings, Inc. 2008 Incentive Compensation Plan. These share-based compensation awards include approximately 0.5 million shares of restricted stock and 0.5 million restricted stock units (“RSUs”) that vest pro-rata over three years on the anniversary of the grant date. The time-vested RSUs are cash-settled based on the 20-day average closing price of UAL common stock immediately prior to the vesting date. In addition, the Company granted 1.3 million performance-based RSUs that will vest based on the Company’s return on invested capital for the three years ending December 31, 2015. If this performance condition is achieved, cash payments will be made after the end of the performance period based on the 20-day average closing price of UAL common stock immediately prior to the vesting date. The Company accounts for the RSUs as liability awards. The table below presents information related to share-based compensation (in millions):


	Three Months Ended March 31,
	2013		2012
Share-based compensation expense (a)	$	27	$	15

	March 31, 2013		December 31, 2012
Unrecognized share-based compensation expense	$	58	$	33

(a)	Includes $8 million and $4 million of expense recognized in Merger integration-related costs for the three months ended March 31, 2013 and 2012, respectively.

Profit Sharing Plans. In 2013, substantially all employees participate in profit sharing plans, which pay 15% of total pre-tax earnings, excluding special items and share-based compensation expense, to eligible employees when pre-tax profit, excluding special items, profit sharing expense and share-based compensation program expense, exceeds $10 million. Eligible U.S. co-workers in each participating work group receive a profit sharing payout using a formula based on the ratio of each qualified co-worker’s annual eligible earnings to the eligible earnings of all qualified co-workers in all domestic workgroups. The international profit sharing plan pays eligible non-U.S. co-workers the same percentage of eligible pay that is calculated under the U.S. profit sharing plan. Profit sharing expense is recorded as a component of salaries and related costs in the consolidated statements of operations.

- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Implementation Guide (Q and A)
-Number FAS88
-Paragraph 63
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
-Paragraph 518
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 03-2
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph h
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-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 8
-Subparagraph m
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5, 6, 7, 8
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 7, 21, 22
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-Number FAS106-2
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+ Details

Financial Instruments and Fair Value Measurements

3 Months Ended

Mar. 31, 2013

Financial Instruments and Fair Value Measurements

NOTE 6—FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS

The table below presents disclosures about the financial assets and financial liabilities measured at fair value on a recurring basis in the Company’s financial statements (in millions):


	March 31, 2013										December 31, 2012
	Total			Level 1		Level 2		Level 3			Total			Level 1		Level 2		Level 3
	UAL
Cash and cash equivalents	$	3,538		$	3,538	$	—	$	—		$	4,770		$	4,770	$	—	$	—
Short-term investments:
Asset-backed securities		762			—		762		—			715			—		715		—
Corporate debt		540			—		540		—			537			—		537		—
Certificates of deposit placed through an account registry service (“CDARS”)		399			—		399		—			367			—		367		—
Auction rate securities		108			—		—		108			116			—		—		116
U.S. government and agency notes		10			—		10		—			12			—		12		—
Other fixed income securities		33			—		33		—			26			—		26		—
Enhanced equipment trust certificates (“EETC”)		61			—		—		61			63			—		—		63
Fuel derivatives, net		73			—		73		—			46			—		46		—
Restricted cash		435			435		—		—			447			447		—		—

	United
Cash and cash equivalents	$	3,532		$	3,532	$	—	$	—		$	4,765		$	4,765	$	—	$	—
Short-term investments:
Asset-backed securities		762			—		762		—			715			—		715		—
Corporate debt		540			—		540		—			537			—		537		—
CDARS		399			—		399		—			367			—		367		—
Auction rate securities		108			—		—		108			116			—		—		116
U.S. government and agency notes		10			—		10		—			12			—		12		—
Other fixed income securities		33			—		33		—			26			—		26		—
EETC		61			—		—		61			63			—		—		63
Fuel derivatives, net		73			—		73		—			46			—		46		—
Restricted cash		435			435		—		—			447			447		—		—
Convertible debt derivative asset		413			—		—		413			268			—		—		268
Convertible debt option liability		(209	)		—		—		(209	)		(128	)		—		—		(128	)

The tables below present disclosures about the activity for “Level 3” financial assets and financial liabilities (in millions):


	Three Months Ended March 31,
	2013						2012
UAL	Auction Rate Securities			EETC			Auction Rate Securities			EETC
Balance at January 1	$	116		$	63		$	113		$	60
Settlements		(10	)		(2	)		—			(2	)
Gains (losses):
Reported in earnings—realized		2			—			—			—
Reported in earnings—unrealized		1			—			(1	)		—
Reported in other comprehensive income (loss)		(1	)		—			—			4

Balance at March 31	$	108		$	61		$	112		$	62


	Three Months Ended March 31,
	2013											2012
United	Auction Rate Securities			Convertible Debt Supplemental Derivative Asset		Convertible Debt Conversion Option Liability			EETC			Auction Rate Securities			Convertible Debt Supplemental Derivative Asset		Convertible Debt Conversion Option Liability			EETC
Balance at January 1	$	116		$	268	$	(128	)	$	63		$	113		$	193	$	(95	)	$	60
Purchases, sales, issuances and settlements (net)		(10	)		—		—			(2	)		—			—		—			(2	)
Gains and (losses):
Reported in earnings:
Realized		2			—		—			—			—			—		—			—
Unrealized		1			145		(81	)		—			(1	)		38		(24	)		—
Reported in other comprehensive income (loss)		(1	)		—		—			—			—			—		—			4

Balance at March 31	$	108		$	413	$	(209	)	$	61		$	112		$	231	$	(119	)	$	62

As of March 31, 2013, the Company’s auction rate securities, which had a par value of $125 million, were variable-rate debt instruments with contractual maturities generally greater than ten years and with interest rates that reset every 7, 28 or 35 days, depending on the terms of the particular instrument. These securities are backed by pools of student loans guaranteed by state-designated guaranty agencies and reinsured by the U.S. government. All of the auction rate securities that the Company holds are senior obligations under the applicable indentures authorizing the issuance of the securities.

As of March 31, 2013, EETC securities had unrealized gains of $2 million. All changes in the fair value of these investments have been classified within accumulated other comprehensive income.

United’s debt-related derivatives presented in the tables above relate to (a) supplemental indenture agreements that provide that United’s convertible debt is convertible into shares of UAL common stock upon the terms and conditions specified in the indentures, and (b) the embedded conversion options in United’s convertible debt that are required to be separated and accounted for as though they are free-standing derivatives as a result of the United debt becoming convertible into the common stock of a different reporting entity. The derivatives described above relate to the 6% convertible junior subordinated debentures due 2030 and the 4.5% convertible notes due 2015. These derivatives are reported in United’s separate financial statements and eliminated in consolidation for UAL.

Derivative instruments and investments presented in the tables above have the same fair value as their carrying value. The table below presents the carrying values and estimated fair values of financial instruments not presented in the tables above (in millions):


	Fair Value of Debt by Fair Value Hierarchy Level
	March 31, 2013										December 31, 2012
	Carrying Amount		Fair Value								Carrying Amount		Fair Value
			Total		Level 1		Level 2		Level 3				Total		Level 1		Level 2		Level 3
UAL debt	$	11,261	$	13,020	$	—	$	8,028	$	4,992	$	12,252	$	13,419	$	—	$	8,045	$	5,374
United debt		10,862		11,745		—		6,753		4,992		11,850		12,460		—		7,086		5,374


Quantitative Information About Level 3 Fair Value Measurements (in millions)

Item	Fair Value at March 31, 2013			Valuation Technique	Unobservable Input	Range (Weighted Average)
Auction rate securities	$	108		Discounted Cash Flows	Credit risk premium (a) Illiquidity premium (b)	1% 5%
					Expected repayments (c)	Assumed repayment in years 2013 through 2036
EETC		61		Discounted Cash Flows	Structure credit risk (d)	6%
Convertible debt derivative asset		413		Binomial Lattice Model	Expected volatility (e) Own credit risk (f)	45% - 60% (47%) 6%
Convertible debt option liability		(209	)	Binomial Lattice Model	Expected volatility (e) Own credit risk (f)	45% - 60% (47%) 6%

(a)	Represents the credit risk premium component of the discount rate that the Company has determined market participants would use in pricing the investments.

(b)	Represents the illiquidity premium component of the discount rate that the Company has determined market participants would use in pricing the investments.

(c)	Represents the estimated timing of principal repayments used in the discounted cash flow model.

(d)	Represents the credit risk premium of the EETC structure above the risk-free rate that the Company has determined market participants would use in pricing the instruments.

(e)	Represents the range in volatility estimates that the Company has determined market participants would use when pricing the instruments.

(f)	Represents the range of Company-specific risk adjustments that the Company has determined market participants would use as a model input.

Valuation Processes—Level 3 Measurements—The Company’s internal valuation group values financial instruments. Depending on the instrument, the valuation group utilizes discounted cash flow methods or option pricing methods as indicated above. Valuations using discounted cash flow methods are generally conducted by the valuation group. Valuations using option pricing models are generally provided to the Company by third-party valuation experts. Each reporting period, the valuation group reviews the unobservable inputs used by third-party valuation experts for reasonableness utilizing relevant information available to the Company from other published sources. The Company has a formal process to review changes in fair value for satisfactory explanation.

Sensitivity Analysis—Level 3 Measurements—Changes in the unobservable input values would be unlikely to cause material changes in the fair value of the auction rate securities and EETCs.

The significant unobservable inputs used in the fair value measurement of the United convertible debt derivative assets and liabilities are the UAL stock expected volatility and the Company’s own credit risk. Significant increases (decreases) in expected volatility would result in a higher (lower) fair value measurement. Significant increases (decreases) in the Company’s own credit risk would result in a lower (higher) fair value measurement. A change in one of the inputs would not necessarily result in a directionally similar change in the other.

Fair value of the financial instruments included in the tables above was determined as follows:


Description		Fair Value Methodology
Cash and Cash Equivalents		The carrying amounts approximate fair value because of the short-term maturity of these assets.

Short-term Investments, Investments, and Restricted Cash		Fair value is based on (a) the trading prices of the investment or similar instruments, (b) an income approach, which uses valuation techniques to convert future amounts into a single present amount based on current market expectations about those future amounts when observable trading prices are not available, or (c) internally-developed models of the expected future cash flows related to the securities. These assets have maturities of less than one year except for the EETCs, auction rate securities and corporate debt.

Fuel Derivatives		Derivative contracts are privately negotiated contracts and are not exchange traded. Fair value measurements are estimated with option pricing models that employ observable inputs. Inputs to the valuation models include contractual terms, market prices, yield curves, fuel price curves and measures of volatility, among others.

Foreign Currency Derivatives		Fair value is determined with a formula utilizing observable inputs. Significant inputs to the valuation models include contractual terms, risk-free interest rates and forward exchange rates.

Debt		Fair values were based on either market prices or the discounted amount of future cash flows using our current incremental rate of borrowing for similar liabilities.

Convertible Debt Derivative Asset and Option Liability		United used a binomial lattice model to value the conversion options and the supplemental derivative assets. Significant binomial model inputs that are not objectively determinable include volatility and discount rate.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612

Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13504-108611

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15B
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44A, 44B
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 17-22, 27, 28
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15A
-Subparagraph a-d
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-Name Statement of Financial Accounting Standard (FAS)
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Reference 12: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32, 33, 34
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
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+ Details

Hedging Activities

3 Months Ended

Mar. 31, 2013

Hedging Activities

NOTE 7—HEDGING ACTIVITIES

Aircraft Fuel Hedges. To protect against increases in the prices of aircraft fuel, the Company routinely hedges a portion of its future fuel requirements. As of March 31, 2013, the Company had hedged approximately 32% and 11% of its projected fuel requirements (963 million and 428 million gallons, respectively) for the remainder of 2013 and 2014, respectively, with commonly used financial hedge instruments based on aircraft fuel or closely related commodities, such as heating oil, diesel fuel and crude oil. The Company does not enter into derivative instruments for non-risk management purposes.

Upon proper qualification, the Company accounts for certain fuel derivative instruments as cash flow hedges. All derivatives designated as hedges that meet certain requirements are granted special hedge accounting treatment. The types of instruments the Company utilizes that qualify for special hedge accounting treatment typically include swaps, call options, collars (which consist of a purchased call option and a sold put option) and four-way collars (a collar with a higher strike sold call option and a lower strike purchased put option). Generally, utilizing the special hedge accounting, all periodic changes in fair value of the derivatives designated as hedges that are considered to be effective are recorded in accumulated other comprehensive income (loss) (“AOCI”) until the underlying fuel is consumed and recorded in fuel expense. The Company is exposed to the risk that its hedges may not be effective in offsetting changes in the cost of fuel and that its hedges may not continue to qualify for special hedge accounting. Hedge ineffectiveness results when the change in the fair value of the derivative instrument exceeds the change in the value of the Company’s expected future cash outlay to purchase and consume fuel. To the extent that the periodic changes in the fair value of the derivatives are not effective, that ineffectiveness is classified as Nonoperating income (expense): Miscellaneous, net.

The Company also utilizes certain derivative instruments that are economic hedges but do not qualify for hedge accounting under U.S. GAAP. As with derivatives that qualify for hedge accounting, the purpose of these economic hedges is to mitigate the adverse financial impact of potential increases in the price of fuel. Currently, the only such economic hedges in the Company’s hedging portfolio are three-way collars (which consist of a collar with a cap on maximum price protection available). The Company records changes in the fair value of three-way collars to Nonoperating income (expense): Miscellaneous, net.

If the Company terminates a derivative prior to its contractual settlement date, then the cumulative gain or loss recognized in AOCI at the termination date remains in AOCI until the forecasted transaction occurs. In a situation where it becomes probable that a hedged forecasted transaction will not occur, any gains and/or losses that have been recorded to AOCI would be required to be immediately reclassified into earnings. All cash flows associated with purchasing and settling derivatives are classified as operating cash flows in the statements of cash flows.

The Company records each derivative instrument as a derivative asset or liability (on a gross basis) in its consolidated balance sheets, and, accordingly, records any related collateral on a gross basis.

The following tables present information about the financial statement classification of the Company’s derivatives (in millions):


Classification	Balance Sheet Location	March 31, 2013		December 31, 2012
Derivatives designated as cash flow hedges
Assets:
Fuel contracts due within one year	Receivables	$	19	$	7

Liabilities:
Fuel contracts due within one year	Current liabilities: Other	$	—	$	2

Derivatives not designated as hedges
Assets:
Fuel contracts due within one year	Receivables	$	51	$	44
Fuel contracts with maturities greater than one year	Other assets: Other, net		3		—

Total assets		$	54	$	44

Liabilities:
Fuel contracts due within one year	Current liabilities: Other	$	—	$	2
Fuel contracts with maturities greater than one year	Other liabilities and deferred credits: Other		—		1

Total liabilities		$	—	$	3

Total derivatives
Assets:
Fuel contracts due within one year	Receivables	$	70	$	51
Fuel contracts with maturities greater than one year	Other assets: Other, net		3		—

Total assets		$	73	$	51

Liabilities:
Fuel contracts due within one year	Current liabilities: Other	$	—	$	4
Fuel contracts with maturities greater than one year	Other liabilities and deferred credits: Other		—		1

Total liabilities		$	—	$	5

The following tables present the impact of derivative instruments and their location within the Company’s unaudited Statements of Consolidated Operations (in millions):

Derivatives designated as cash flow hedges


Fuel contracts	Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective portion)					Loss Reclassified from AOCI into Fuel Expense						Amount of Gain Recognized in Nonoperating income (expense): Miscellaneous, net (Ineffective Portion)
	Three Months Ended March 31,					Three Months Ended March 31,						Three Months Ended March 31,
	2013			2012		2013			2012			2013		2012
	$	(9	)	$	93	$	(9	)	$	(31	)	$	—	$	25

Derivatives not designated as hedges


Fuel contracts
	Three Months Ended March 31,
	2013		2012
Amount of gain recognized in Nonoperating income (expense): Miscellaneous, net	$	50	$	—

Derivative Credit Risk and Fair Value

The Company is exposed to credit losses in the event of nonperformance by counterparties to its derivative instruments. While the Company records derivative instruments on a gross basis, the Company monitors its net derivative position with each counterparty to monitor credit risk. Based on the fair value of our fuel derivative instruments, our counterparties may require us to post collateral when the price of the underlying commodity decreases, and we may require our counterparties to provide us with collateral when the price of the underlying commodity increases. The following table presents information related to the Company’s derivative credit risk as of March 31, 2013 (in millions):


Net derivative asset with counterparties	$	73
Collateral held by the Company (a)		—
Potential loss related to the failure of the Company’s counterparties to perform		73

(a)	Classified as an other current liability.

- Definition

The entire disclosure for the entity's entire derivative instruments and hedging activities. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items.

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+ Details

Commitments and Contingencies

3 Months Ended

Mar. 31, 2013

Commitments and Contingencies

NOTE 8—COMMITMENTS AND CONTINGENCIES

Commitments. As of March 31, 2013, UAL and United had the following commitments to purchase aircraft:

UAL Aircraft Commitments. UAL had firm commitments to purchase 100 new Boeing 737 MAX 9 aircraft scheduled for delivery from 2018 through 2022. UAL also had options to purchase an additional 100 Boeing 737 MAX 9 aircraft. UAL had the right, and intends in the future, to assign its interest under the purchase agreement for the 737 MAX 9 aircraft to United.

United Aircraft Commitments. United had firm commitments to purchase 149 new aircraft (49 Boeing 787 aircraft, 75 Boeing 737 aircraft and 25 Airbus A350XWB aircraft) scheduled for delivery from April 1, 2013 through 2020. United also had options and purchase rights for additional aircraft. In the first quarter of 2013, United took delivery of six Boeing 737-900ER. In the remainder of 2013, United expects to take delivery of 18 Boeing 737-900ER aircraft and two Boeing 787-8 aircraft.

United had arranged for EETC financing of 14 Boeing 737-900ER aircraft, six of which were delivered during the first quarter of 2013 and eight scheduled to be delivered during the remainder of 2013. United also has arranged for EETC financing of one Boeing 787-8 aircraft scheduled for delivery in the second half of 2013. In addition, United had secured backstop financing commitments from its widebody aircraft and engine manufacturers for a limited number of its future aircraft deliveries, subject to certain customary conditions. See Note 9 of this report for additional information. However, the Company does not have backstop financing or any financing currently in place for its other firm narrowbody or other aircraft orders with Boeing. Financing will be necessary to satisfy the Company’s capital commitments for its firm order aircraft and other related capital expenditures. The Company can provide no assurance that any financing not already in place for aircraft and spare engine deliveries will be available to the Company on acceptable terms when necessary or at all.

The table below summarizes the Company’s capital commitments as of March 31, 2013, which primarily relate to the acquisition of aircraft and related spare engines, aircraft improvements and acquisition of information technology services and assets:


(In billions)
2013	$	1.6
2014		1.9
2015		1.9
2016		3.0
2017		2.5
After 2017		6.8

	$	17.7

Any incremental firm aircraft orders, including through the exercise of purchase options, will increase the total future capital commitments of the Company.

Guarantees and Off-Balance Sheet Financing.

Guarantees. United is the guarantor of approximately $1.9 billion, in aggregate principal amount of tax-exempt special facilities revenue bonds and interest thereon. These bonds, issued by various airport municipalities, are payable solely from rentals paid under long-term agreements with the respective governing bodies. The leasing arrangements associated with $1.7 billion of these obligations are accounted for as operating leases with the associated expense recorded on a straight-line basis resulting in ratable accrual of the lease obligation over the expected lease term. The leasing arrangements associated with $190 million of these obligations are accounted for as capital leases. All these bonds are due between 2015 and 2038.

In the Company’s financing transactions that include loans, the Company typically agrees to reimburse lenders for any reduced returns with respect to the loans due to any change in capital requirements and, in the case of loans in which the interest rate is based on the London Interbank Offered Rate (“LIBOR”), for certain other increased costs that the lenders incur in carrying these loans as a result of any change in law, subject in most cases to obligations of the lenders to take certain limited steps to mitigate the requirement for, or the amount of, such increased costs. At March 31, 2013, the Company had $2.1 billion of floating rate debt and $327 million of fixed rate debt, with remaining terms of up to nine years, that are subject to these increased cost provisions. In several financing transactions involving loans or leases from non-U.S. entities, with remaining terms of up to eight years and an aggregate balance of $2.4 billion, the Company bears the risk of any change in tax laws that would subject loan or lease payments thereunder to non-U.S. entities to withholding taxes, subject to customary exclusions.

Credit Facilities. On March 27, 2013, United and UAL entered into a new Credit and Guaranty Agreement (the “Credit Agreement”) as the borrower and guarantor, respectively, that provides United with a $1.0 billion revolving credit facility. As of March 31, 2013, United had its entire capacity of $1.0 billion available under the revolving credit facility. See Note 9 of this report for more information.

Labor Negotiations. As of March 31, 2013, United had approximately 88,000 active employees, of whom approximately 80% were represented by various labor organizations.

In February 2013, United reached tentative agreements on new joint collective bargaining agreements with the International Association of Machinists (“IAM”) for its fleet service, passenger service and storekeeper workgroups. These tentative agreements were not ratified by the IAM members and, as a result, United and the IAM-represented workgroups will be returning to collective bargaining agreement negotiations. Having reached a ratified joint collective bargaining agreement with our pilots represented by the Air Line Pilots Association, International, we are currently in the process of negotiating joint collective bargaining agreements with our other major work groups, including technicians, flight attendants and dispatchers.

- Definition

The entire disclosure for commitments and contingencies.

+ References

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+ Details

Debt

3 Months Ended

Mar. 31, 2013

Debt

NOTE 9—DEBT

As of March 31, 2013, a substantial portion of our assets are pledged as collateral for our debt. These assets principally consist of aircraft, route authorities and loyalty program intangible assets. As of March 31, 2013, the Company was in compliance with its debt covenants.

2013 Credit and Guaranty Agreement. On March 27, 2013, United and UAL entered into the Credit Agreement as the borrower and guarantor, respectively. The Credit Agreement consists of a $900 million term loan due April 1, 2019 and a $1.0 billion revolving credit facility available for drawing until April 1, 2018. As of March 31, 2013, United had its entire capacity of $1.0 billion available under the revolving credit facility. The obligations of United under the Credit Agreement are secured by liens on certain international route authorities between certain specified cities, certain take-off and landing rights and related assets of United.

Borrowings under the Credit Agreement bear interest at a variable rate equal to LIBOR, subject to a 1% floor, plus a margin of 3.0% per annum, or another rate based on certain market interest rates, plus a margin of 2.0% per annum. The principal amount of the term loan must be repaid in consecutive quarterly installments of 0.25% of the original principal amount thereof, commencing on June 30, 2013, with any unpaid balance due on April 1, 2019. United may prepay all or a portion of the loan from time to time, at par plus accrued and unpaid interest. United pays a commitment fee equal to 0.75% per-annum on the undrawn amount available under the Revolving Credit Facility (as defined below).

The Credit Agreement includes covenants that, among other things, require the Company to maintain at least $3.0 billion of unrestricted liquidity and a minimum ratio of appraised value of collateral to the outstanding obligations under the Credit Agreement of 1.67 to 1.0 and restrict the Company’s ability to incur additional indebtedness, issue preferred stock, make investments or pay dividends. The Credit Agreement contains events of default customary for this type of financing, including a cross default and cross acceleration provision to certain other material indebtedness of the Company.

United Amended Credit Facility. On March 27, 2013, the Company used $900 million from the Credit Agreement, together with approximately $300 million of cash to retire the entire principal balance of a $1.2 billion term loan due 2014 that was outstanding under United’s Amended and Restated Revolving Credit, Term Loan and Guaranty Agreement, dated as of February 2, 2007 (the “Amended Credit Facility”). The Amended Credit Facility was terminated concurrently with the repayment of the term loan.

Revolving Credit Facility. On March 27, 2013, the Company terminated the $500 million revolving credit facility (the “Revolving Credit Facility”). There were no outstanding borrowings under the Revolving Credit Facility.

Debt Redemptions. On February 1, 2013, United redeemed all of the $400 million aggregate principal amount of its 9.875% Senior Secured Notes due 2013 and $200 million aggregate principal amount of 12.0% Senior Second Lien Notes due 2013. On February 8, 2013, United redeemed all $123 million aggregate principal amount of the B tranche of the 2006-1 EETC equipment notes due 2013. On April 1, 2013, United redeemed all of the $180 million aggregate principal amount of the senior tranche of the 2006-1 EETC equipment notes due 2013. These notes were all redeemed prior to their scheduled maturity date.

EETCs. In October 2012, United created two pass-through trusts, one of which issued $712 million aggregate principal amount of Class A pass-through certificates with a stated interest rate of 4% and the second of which issued $132 million aggregate principal amount of Class B pass-through certificates with a stated interest rate of 5.5%. The proceeds of the issuance of the Class A and Class B pass-through certificates, which amounted to $844 million, are used to purchase equipment notes issued by United. Of the $844 million in proceeds raised by the pass-through trusts, United received $494 million as of March 31, 2013, of which $201 million was received in the first quarter of 2013. United expects to receive the remaining proceeds from the issuance through the second half of 2013 as aircraft are delivered and United issues equipment notes to the trusts. The Company records the debt obligation upon issuance of the equipment notes rather than upon the initial issuance of the pass-through certificates. The proceeds have been and are expected to be used to fund the acquisition of new aircraft.

In December 2012, United created one pass-through trust which issued $425 million aggregate principal amount of Class C pass-through certificates with a stated interest rate of 6.125%. The proceeds of the issuance of the Class C pass-through certificates are used to purchase equipment notes issued by United related to the aircraft financed in both the March and October 2012 EETC financings. Of the $425 million in proceeds raised by the pass-through trusts, United received $331 million as of March 31, 2013, of which $54 million was received in the first quarter of 2013. United expects to receive the remaining proceeds from the issuance through the second half of 2013 as aircraft are delivered and United issues equipment notes to the trusts. The Company records the debt obligation upon issuance of the equipment notes rather than upon the initial issuance of the pass-through certificates.

The table below presents contractual principal payments at March 31, 2013 under then-outstanding long-term debt agreements in each of the next five calendar years (in millions):


	UAL		United
Last nine months of 2013	$	859	$	859
2014		958		958
2015		2,044		2,044
2016		1,003		1,003
2017		566		566
After 2017		5,985		5,640

	$	11,415	$	11,070

Special Items

3 Months Ended

Mar. 31, 2013

Special Items

NOTE 10—SPECIAL ITEMS

Special Charges. For the three months ended March 31, special charges consisted of the following (in millions):


	Three Months Ended March 31,
	2013			2012
Merger integration-related costs	$	70		$	134
Voluntary severance and benefits		14			49
Charges for temporarily grounded 787 aircraft		11			—
Gains on sale of assets and other special items, net		(3	)		(19	)

Subtotal special charges		92			164
Income tax benefit		—			(2	)

Total special charges, net of income taxes	$	92		$	162

Merger integration-related costs include compensation costs related to systems integration and training, costs to repaint aircraft and other branding activities, new uniforms, costs to write-off or accelerate depreciation on systems and facilities that are no longer used or planned to be used for significantly shorter periods, relocation costs for employees and severance primarily associated with administrative headcount reductions.

During the three months ended March 31, 2013, the Company recorded $14 million associated with a voluntary program offered by United in which flight attendants took an unpaid 13-month leave of absence. The flight attendants continue to receive medical benefits and other company benefits while on leave under this program. Approximately 1,300 flight attendants opted to participate in the program. In addition, the Company recorded $11 million associated with the temporary grounding of its Boeing 787 aircraft. The charges are comprised of aircraft depreciation expense and dedicated personnel costs that the Company continues to incur while the aircraft are grounded. Also, the Company recorded a $5 million gain related to a contract termination and $2 million in losses on the sale of assets.

During the three months ended March 31, 2012, the Company recorded $49 million of severance and benefits associated with two voluntary employee programs. In one program, approximately 400 mechanics offered to retire early in exchange for a cash severance payment that was based on the number of years of service each employee had accumulated. The other program is a voluntary Company-offered leave of absence that approximately 1,800 flight attendants accepted, which allows for continued medical coverage during the leave of absence period.

In March 2013, the Company agreed to sell up to 30 Boeing 757-200 aircraft to FedEx Corporation beginning in April of 2013. As of December 31, 2012, the Company operated 133 such aircraft. Given the planned sale of up to 30 of these aircraft, the Company evaluated the entire fleet and determined that no impairment existed. However, the Company adjusted the salvage value of the aircraft designated for sale to its sales price and will record additional depreciation from the agreement date to the date of sale. This additional depreciation is not classified as special. The additional depreciation in the first quarter of 2013 totaled $12 million and approximately $80 million for the full year 2013.

Accruals

The accrual for severance and medical costs was $62 million as of March 31, 2013. In addition, the accrual balance of future lease payments on permanently grounded aircraft was $5 million as of March 31, 2013.

The severance-related accrual as of March 31, 2013, which primarily relates to the Merger, is expected to be paid through 2014. Lease payments for grounded aircraft are expected to continue through 2013.

At March 31, 2012, the accrual balance for severance and medical costs was $90 million. In addition, the accrual balance of future lease payments on permanently grounded aircraft was $23 million as of March 31, 2012.

Accumulated Other Comprehensive Income (Loss)

3 Months Ended

Mar. 31, 2013

Accumulated Other Comprehensive Income (Loss)

NOTE 11—ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The tables below present the components of the Company’s AOCI, net of tax (in millions):


UAL	Pension and Other Postretirement Unrecognized Actuarial Gains (Losses) and Prior Service Cost			Unrealized Gain (Loss) on Derivatives			Other			Total
Balance at December 31, 2012	$	(1,042	)	$	(10	)	$	6		$	(1,046	)
Other comprehensive loss before reclassifications		—			(9	)		(2	)		(11	)
Amounts reclassified from accumulated other comprehensive income		21			9			—			30

Net current-period other comprehensive income (loss)		21			—			(2	)		19

Balance at March 31, 2013	$	(1,021	)	$	(10	)	$	4		$	(1,027	)


UAL	Pension and Other Postretirement Unrecognized Actuarial Gains (Losses) and Prior Service Cost			Unrealized Gain (Loss) on Derivatives			Other			Total
Balance at December 31, 2011	$	(312	)	$	(99	)	$	(6	)	$	(417	)
Other comprehensive income before reclassifications		—			93			9			102
Amounts reclassified from accumulated other comprehensive income		4			31			—			35

Net current-period other comprehensive income		4			124			9			137

Balance at March 31, 2012	$	(308	)	$	25		$	3		$	(280	)


United	Pension and Other Postretirement Unrecognized Actuarial Gains (Losses) and Prior Service Cost			Unrealized Gain (Loss) on Derivatives			Other			Income Tax Benefit (Expense)			Total
Balance at December 31, 2012	$	(1,042	)	$	(10	)	$	5		$	(6	)	$	(1,053	)
Other comprehensive loss before reclassifications		—			(9	)		(1	)		—			(10	)
Amounts reclassified from accumulated other comprehensive income		21			9			—			6			36

Net current-period other comprehensive income (loss)		21			—			(1	)		6			26

Balance at March 31, 2013	$	(1,021	)	$	(10	)	$	4		$	—		$	(1,027	)


United	Pension and Other Postretirement Unrecognized Actuarial Gains (Losses) and Prior Service Cost			Unrealized Gain (Loss) on Derivatives			Other			Income Tax Expense			Total
Balance at December 31, 2011	$	(312	)	$	(99	)	$	(8	)	$	(6	)	$	(425	)
Other comprehensive income before reclassifications		—			93			10			—			103
Amounts reclassified from accumulated other comprehensive income		4			31			—			—			35

Net current-period other comprehensive income		4			124			10			—			138
Balance at March 31, 2012	$	(308	)	$	25		$	2		$	(6	)	$	(287	)

UAL

Details about AOCI Components

Amount Reclassified from
AOCI to Income (a)

Affected Line Item in the
Statement Where Net Income is
Presented

Three Months Ended
March 31,

2013

2012

Derivatives designated as cash flow hedges

Fuel contracts-reclassifications of losses into earnings

Aircraft fuel

Amortization of pension and post-retirement items

Amortization of unrecognized loss and prior service cost

)

Salaries and related costs

(a)	Income tax expense offset by Company’s valuation allowance.

(b)	This accumulated other comprehensive income component is included in the computation of net periodic pension costs (see Note 5 of this report for additional details.)

United

Details about AOCI Components

Amount Reclassified from
AOCI to Income

Affected Line Item in the
Statement Where Net Income
is Presented

Three Months Ended
March 31,

2013

2012

Derivatives designated as cash flow hedges

Fuel contracts-reclassifications of losses into earnings (a)

Aircraft fuel

Amortization of pension and post-retirement items

Amortization of unrecognized loss and prior service cost (a)

)

Salaries and related costs

Income tax expense on other comprehensive income

—

Income tax expense (benefit)

(a)	Income tax expense offset by Company’s valuation allowance.

(b)	This accumulated other comprehensive income component is included in the computation of net periodic pension costs (see Note 5 of this report for additional details.)

Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Computation of Earnings Per Share


	Three Months Ended March 31,
	2013			2012
Basic and diluted loss per share:
Loss available to common stockholders	$	(417	)	$	(448	)

Weighted average shares outstanding, basic and diluted		332			330

Loss per share, basic and diluted	$	(1.26	)	$	(1.36	)

Potentially dilutive shares excluded from diluted per share amounts:
Restricted stock and stock options		4			7
4.5% senior limited-subordination convertible notes		5			5
4.5% convertible notes		12			12
6% convertible junior subordinated debentures		4			4
6% senior convertible notes		40			40

Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2013

Components Of Net Periodic Benefit Cost

The Company’s net periodic benefit cost includes the following components (in millions):


	Pension Benefits						Other Postretirement Benefits
	Three Months Ended March 31,						Three Months Ended March 31,
	2013			2012			2013			2012
Service cost	$	33		$	25		$	14		$	13
Interest cost		47			46			28			31
Expected return on plan assets		(40	)		(35	)		(1	)		(1	)
Amortization of unrecognized (gain) loss and prior service cost		18			5			3			(1	)

Net periodic benefit costs	$	58		$	41		$	44		$	42

Share-Based Compensation Expense

The table below presents information related to share-based compensation (in millions):


	Three Months Ended March 31,
	2013		2012
Share-based compensation expense (a)	$	27	$	15

	March 31, 2013		December 31, 2012
Unrecognized share-based compensation expense	$	58	$	33

(a)	Includes $8 million and $4 million of expense recognized in Merger integration-related costs for the three months ended March 31, 2013 and 2012, respectively.

Financial Instruments and Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

The table below presents disclosures about the financial assets and financial liabilities measured at fair value on a recurring basis in the Company’s financial statements (in millions):


	March 31, 2013										December 31, 2012
	Total			Level 1		Level 2		Level 3			Total			Level 1		Level 2		Level 3
	UAL
Cash and cash equivalents	$	3,538		$	3,538	$	—	$	—		$	4,770		$	4,770	$	—	$	—
Short-term investments:
Asset-backed securities		762			—		762		—			715			—		715		—
Corporate debt		540			—		540		—			537			—		537		—
Certificates of deposit placed through an account registry service (“CDARS”)		399			—		399		—			367			—		367		—
Auction rate securities		108			—		—		108			116			—		—		116
U.S. government and agency notes		10			—		10		—			12			—		12		—
Other fixed income securities		33			—		33		—			26			—		26		—
Enhanced equipment trust certificates (“EETC”)		61			—		—		61			63			—		—		63
Fuel derivatives, net		73			—		73		—			46			—		46		—
Restricted cash		435			435		—		—			447			447		—		—

	United
Cash and cash equivalents	$	3,532		$	3,532	$	—	$	—		$	4,765		$	4,765	$	—	$	—
Short-term investments:
Asset-backed securities		762			—		762		—			715			—		715		—
Corporate debt		540			—		540		—			537			—		537		—
CDARS		399			—		399		—			367			—		367		—
Auction rate securities		108			—		—		108			116			—		—		116
U.S. government and agency notes		10			—		10		—			12			—		12		—
Other fixed income securities		33			—		33		—			26			—		26		—
EETC		61			—		—		61			63			—		—		63
Fuel derivatives, net		73			—		73		—			46			—		46		—
Restricted cash		435			435		—		—			447			447		—		—
Convertible debt derivative asset		413			—		—		413			268			—		—		268
Convertible debt option liability		(209	)		—		—		(209	)		(128	)		—		—		(128	)

Activity for "Level Three" Financial Assets and Financial Liabilities

The tables below present disclosures about the activity for “Level 3” financial assets and financial liabilities (in millions):


	Three Months Ended March 31,
	2013						2012
UAL	Auction Rate Securities			EETC			Auction Rate Securities			EETC
Balance at January 1	$	116		$	63		$	113		$	60
Settlements		(10	)		(2	)		—			(2	)
Gains (losses):
Reported in earnings—realized		2			—			—			—
Reported in earnings—unrealized		1			—			(1	)		—
Reported in other comprehensive income (loss)		(1	)		—			—			4

Balance at March 31	$	108		$	61		$	112		$	62


	Three Months Ended March 31,
	2013											2012
United	Auction Rate Securities			Convertible Debt Supplemental Derivative Asset		Convertible Debt Conversion Option Liability			EETC			Auction Rate Securities			Convertible Debt Supplemental Derivative Asset		Convertible Debt Conversion Option Liability			EETC
Balance at January 1	$	116		$	268	$	(128	)	$	63		$	113		$	193	$	(95	)	$	60
Purchases, sales, issuances and settlements (net)		(10	)		—		—			(2	)		—			—		—			(2	)
Gains and (losses):
Reported in earnings:
Realized		2			—		—			—			—			—		—			—
Unrealized		1			145		(81	)		—			(1	)		38		(24	)		—
Reported in other comprehensive income (loss)		(1	)		—		—			—			—			—		—			4

Balance at March 31	$	108		$	413	$	(209	)	$	61		$	112		$	231	$	(119	)	$	62

Carrying Values and Estimated Fair Values of Financial Instruments

The table below presents the carrying values and estimated fair values of financial instruments not presented in the tables above (in millions):


	Fair Value of Debt by Fair Value Hierarchy Level
	March 31, 2013										December 31, 2012
	Carrying Amount		Fair Value								Carrying Amount		Fair Value
			Total		Level 1		Level 2		Level 3				Total		Level 1		Level 2		Level 3
UAL debt	$	11,261	$	13,020	$	—	$	8,028	$	4,992	$	12,252	$	13,419	$	—	$	8,045	$	5,374
United debt		10,862		11,745		—		6,753		4,992		11,850		12,460		—		7,086		5,374

Quantitative Information about Level 3 Fair Value Measurements

Quantitative Information About Level 3 Fair Value Measurements (in millions)

Item	Fair Value at March 31, 2013			Valuation Technique	Unobservable Input	Range (Weighted Average)
Auction rate securities	$	108		Discounted Cash Flows	Credit risk premium (a) Illiquidity premium (b)	1% 5%
					Expected repayments (c)	Assumed repayment in years 2013 through 2036
EETC		61		Discounted Cash Flows	Structure credit risk (d)	6%
Convertible debt derivative asset		413		Binomial Lattice Model	Expected volatility (e) Own credit risk (f)	45% - 60% (47%) 6%
Convertible debt option liability		(209	)	Binomial Lattice Model	Expected volatility (e) Own credit risk (f)	45% - 60% (47%) 6%

(a)	Represents the credit risk premium component of the discount rate that the Company has determined market participants would use in pricing the investments.

(b)	Represents the illiquidity premium component of the discount rate that the Company has determined market participants would use in pricing the investments.

(c)	Represents the estimated timing of principal repayments used in the discounted cash flow model.

(d)	Represents the credit risk premium of the EETC structure above the risk-free rate that the Company has determined market participants would use in pricing the instruments.

(e)	Represents the range in volatility estimates that the Company has determined market participants would use when pricing the instruments.

(f)	Represents the range of Company-specific risk adjustments that the Company has determined market participants would use as a model input.

- Definition

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

+ References + Details

- Definition

Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13476-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13467-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 19
-Subparagraph a, b, c(1), d(1)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 14
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15
-Subparagraph b-d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 18
-Subparagraph c(2), d, e, f
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32
-Subparagraph a, c(1), c(2), c(3), d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2013

Description of Derivative Instruments

The following tables present information about the financial statement classification of the Company’s derivatives (in millions):


Classification	Balance Sheet Location	March 31, 2013		December 31, 2012
Derivatives designated as cash flow hedges
Assets:
Fuel contracts due within one year	Receivables	$	19	$	7

Liabilities:
Fuel contracts due within one year	Current liabilities: Other	$	—	$	2

Derivatives not designated as hedges
Assets:
Fuel contracts due within one year	Receivables	$	51	$	44
Fuel contracts with maturities greater than one year	Other assets: Other, net		3		—

Total assets		$	54	$	44

Liabilities:
Fuel contracts due within one year	Current liabilities: Other	$	—	$	2
Fuel contracts with maturities greater than one year	Other liabilities and deferred credits: Other		—		1

Total liabilities		$	—	$	3

Total derivatives
Assets:
Fuel contracts due within one year	Receivables	$	70	$	51
Fuel contracts with maturities greater than one year	Other assets: Other, net		3		—

Total assets		$	73	$	51

Liabilities:
Fuel contracts due within one year	Current liabilities: Other	$	—	$	4
Fuel contracts with maturities greater than one year	Other liabilities and deferred credits: Other		—		1

Total liabilities		$	—	$	5

Schedule of Gains (Losses) on Derivative Instruments

The following tables present the impact of derivative instruments and their location within the Company’s unaudited Statements of Consolidated Operations (in millions):

Derivatives designated as cash flow hedges


Fuel contracts	Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective portion)					Loss Reclassified from AOCI into Fuel Expense						Amount of Gain Recognized in Nonoperating income (expense): Miscellaneous, net (Ineffective Portion)
	Three Months Ended March 31,					Three Months Ended March 31,						Three Months Ended March 31,
	2013			2012		2013			2012			2013		2012
	$	(9	)	$	93	$	(9	)	$	(31	)	$	—	$	25

Derivatives not designated as hedges


Fuel contracts
	Three Months Ended March 31,
	2013		2012
Amount of gain recognized in Nonoperating income(expense): Miscellaneous, net	$	50	$	—

Schedule of Derivative Credit Risk and Fair Value

The following table presents information related to the Company’s derivative credit risk as of March 31, 2013 (in millions):


Net derivative asset with counterparties	$	73
Collateral held by the Company (a)		—
Potential loss related to the failure of the Company’s counterparties to perform		73

(a)	Classified as an other current liability.

- Definition

Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges.

+ References + Details

Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2013

Schedule of Acquisition of Aircrafts and Related Spare Engines


(In billions)
2013	$	1.6
2014		1.9
2015		1.9
2016		3.0
2017		2.5
After 2017		6.8

	$	17.7

Debt (Tables)

3 Months Ended

Mar. 31, 2013

Contractual Principal Payments

The table below presents contractual principal payments at March 31, 2013 under then-outstanding long-term debt agreements in each of the next five calendar years (in millions):


	UAL		United
Last nine months of 2013	$	859	$	859
2014		958		958
2015		2,044		2,044
2016		1,003		1,003
2017		566		566
After 2017		5,985		5,640

	$	11,415	$	11,070

Special Items (Tables)

3 Months Ended

Mar. 31, 2013

Components of Special Charges

For the three months ended March 31, special charges consisted of the following (in millions):


	Three Months Ended March 31,
	2013			2012
Merger integration-related costs	$	70		$	134
Voluntary severance and benefits		14			49
Charges for temporarily grounded 787 aircraft		11			—
Gains on sale of assets and other special items, net		(3	)		(19	)

Subtotal special charges		92			164
Income tax benefit		—			(2	)

Total special charges, net of income taxes	$	92		$	162

Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2013

Components of Accumulated Other Comprehensive Income (loss), Net of Tax

The tables below present the components of the Company’s AOCI, net of tax (in millions):


UAL	Pension and Other Postretirement Unrecognized Actuarial Gains (Losses) and Prior Service Cost			Unrealized Gain (Loss) on Derivatives			Other			Total
Balance at December 31, 2012	$	(1,042	)	$	(10	)	$	6		$	(1,046	)
Other comprehensive loss before reclassifications		—			(9	)		(2	)		(11	)
Amounts reclassified from accumulated other comprehensive income		21			9			—			30

Net current-period other comprehensive income (loss)		21			—			(2	)		19

Balance at March 31, 2013	$	(1,021	)	$	(10	)	$	4		$	(1,027	)


UAL	Pension and Other Postretirement Unrecognized Actuarial Gains (Losses) and Prior Service Cost			Unrealized Gain (Loss) on Derivatives			Other			Total
Balance at December 31, 2011	$	(312	)	$	(99	)	$	(6	)	$	(417	)
Other comprehensive income before reclassifications		—			93			9			102
Amounts reclassified from accumulated other comprehensive income		4			31			—			35

Net current-period other comprehensive income		4			124			9			137

Balance at March 31, 2012	$	(308	)	$	25		$	3		$	(280	)


United	Pension and Other Postretirement Unrecognized Actuarial Gains (Losses) and Prior Service Cost			Unrealized Gain (Loss) on Derivatives			Other			Income Tax Benefit (Expense)			Total
Balance at December 31, 2012	$	(1,042	)	$	(10	)	$	5		$	(6	)	$	(1,053	)
Other comprehensive loss before reclassifications		—			(9	)		(1	)		—			(10	)
Amounts reclassified from accumulated other comprehensive income		21			9			—			6			36

Net current-period other comprehensive income (loss)		21			—			(1	)		6			26

Balance at March 31, 2013	$	(1,021	)	$	(10	)	$	4		$	—		$	(1,027	)


United	Pension and Other Postretirement Unrecognized Actuarial Gains (Losses) and Prior Service Cost			Unrealized Gain (Loss) on Derivatives			Other			Income Tax Expense			Total
Balance at December 31, 2011	$	(312	)	$	(99	)	$	(8	)	$	(6	)	$	(425	)
Other comprehensive income before reclassifications		—			93			10			—			103
Amounts reclassified from accumulated other comprehensive income		4			31			—			—			35

Net current-period other comprehensive income		4			124			10			—			138
Balance at March 31, 2012	$	(308	)	$	25		$	2		$	(6	)	$	(287	)

UAL

Details about AOCI Components

Amount Reclassified from
AOCI to Income (a)

Affected Line Item in the
Statement Where Net Income is
Presented

Three Months Ended
March 31,

2013

2012

Derivatives designated as cash flow hedges

Fuel contracts-reclassifications of losses into earnings

Aircraft fuel

Amortization of pension and post-retirement items

Amortization of unrecognized loss and prior service cost

)

Salaries and related costs

(a)	Income tax expense offset by Company’s valuation allowance.

(b)	This accumulated other comprehensive income component is included in the computation of net periodic pension costs (see Note 5 of this report for additional details.)

United

Details about AOCI Components

Amount Reclassified from
AOCI to Income

Affected Line Item in the
Statement Where Net Income
is Presented

Three Months Ended
March 31,

2013

2012

Derivatives designated as cash flow hedges

Fuel contracts-reclassifications of losses into earnings (a)

Aircraft fuel

Amortization of pension and post-retirement items

Amortization of unrecognized loss and prior service cost (a)

)

Salaries and related costs

Income tax expense on other comprehensive income

—

Income tax expense (benefit)

(a)	Income tax expense offset by Company’s valuation allowance.

(b)	This accumulated other comprehensive income component is included in the computation of net periodic pension costs (see Note 5 of this report for additional details.)

Computation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Basic and diluted loss per share:
Loss available to common stockholders	$ (417)	$ (448)
Weighted average shares outstanding, basic and diluted	332	330
Loss per share, basic and diluted	$ (1.26)	$ (1.36)
4.5 % Senior Limited Subordination Convertible Notes
Potentially dilutive shares excluded from diluted per share amounts:
Potentially dilutive shares excluded from diluted per share amounts	5	5
4.5% Convertible Notes
Potentially dilutive shares excluded from diluted per share amounts:
Potentially dilutive shares excluded from diluted per share amounts	12	12
6% Convertible Junior Subordinated Debentures
Potentially dilutive shares excluded from diluted per share amounts:
Potentially dilutive shares excluded from diluted per share amounts	4	4
6% Senior Convertible Notes
Potentially dilutive shares excluded from diluted per share amounts:
Potentially dilutive shares excluded from diluted per share amounts	40	40
Restricted Stock And Stock Options
Potentially dilutive shares excluded from diluted per share amounts:
Potentially dilutive shares excluded from diluted per share amounts	4	7

Computation of Earnings Per Share (Parenthetical) (Detail)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
4.5 % Senior Limited Subordination Convertible Notes
Earnings Loss Per Share [Line Items]
Debt instrument convertible effective interest rate	4.50%	4.50%
4.5% Convertible Notes
Earnings Loss Per Share [Line Items]
Debt instrument convertible effective interest rate	4.50%	4.50%
6% Convertible Junior Subordinated Debentures
Earnings Loss Per Share [Line Items]
Debt instrument convertible effective interest rate	6.00%	6.00%
6% Senior Convertible Notes
Earnings Loss Per Share [Line Items]
Debt instrument convertible effective interest rate	6.00%	6.00%

Income Taxes - Additional Information (Detail)	3 Months Ended
Income Taxes - Additional Information (Detail)	Mar. 31, 2013
Income Taxes [Line Items]
Federal statutory income tax rate	35.00%

Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 33	$ 25
Interest cost	47	46
Expected return on plan assets	(40)	(35)
Amortization of unrecognized (gain) loss and prior service cost	18	5
Net periodic benefit costs	58	41
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	14	13
Interest cost	28	31
Expected return on plan assets	(1)	(1)
Amortization of unrecognized (gain) loss and prior service cost	3	(1)
Net periodic benefit costs	$ 44	$ 42

- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 30
-Glossary Expected Return on Plan Assets
-URI http://asc.fasb.org/extlink&oid=6512136

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 60
-Glossary Expected Return on Plan Assets
-URI http://asc.fasb.org/extlink&oid=6512171

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)(3)
-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph h
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
-Paragraph 518
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

+ References + Details

- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Service Cost (Component of Net Periodic Pension Cost)
-URI http://asc.fasb.org/extlink&oid=6525008

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a, h
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
-Paragraph 518
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Employee Benefit Plans - Additional Information (Detail) shares in Millions, $ in Millions	1 Months Ended	3 Months Ended
	Feb. 28, 2013 shares	Mar. 31, 2013 USD ($) d
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employer contribution to tax-qualified defined benefit pension plans \| $		$ 41
Number of days used to compute performance period average closing price of restricted stock units \| d		20
Percentage of pre-tax earnings paid for profit sharing plan		15.00%
Share-based compensation program pre-tax profits excluding special items, profit sharing expense and share-based compensation program expense threshold \| $		$ 10
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation, award granted	0.5
Share-Based Compensation, vesting period	3 years
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation, award granted	0.5
Share-Based Compensation, vesting period	3 years
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation, award granted	1.3
Share-Based Compensation, vesting period	3 years
Share-Based Compensation, vesting date	Dec. 31, 2015

Share-Based Compensation Expense (Detail) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2013

Mar. 31, 2012

Dec. 31, 2012

Share-based compensation expense

^[1]

$ 27

$ 15

Unrecognized share-based compensation expense

$ 58

$ 33

[1]	Includes $8 million and $4 million of expense recognized in Merger integration-related costs for the three months ended March 31, 2013 and 2012, respectively.

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References + Details

Share-Based Compensation Expense (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Expense recognized in integration-related costs	$ 8	$ 4

Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Cash and Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	$ 3,538	$ 4,770
Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	762	715
Corporate Debt
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	540	537
CDARS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	399	367
Auction Rate Securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	108	116
U.S. Government And Agency Notes
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	10	12
Other Fixed Income Securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	33	26
EETC
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
EETC	61	63
Fuel Derivatives, Net
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fuel derivatives, net	73	46
Restricted Cash
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Restricted cash	435	447
Level 1 \| Cash and Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	3,538	4,770
Level 1 \| Restricted Cash
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Restricted cash	435	447
Level 2 \| Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	762	715
Level 2 \| Corporate Debt
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	540	537
Level 2 \| CDARS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	399	367
Level 2 \| U.S. Government And Agency Notes
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	10	12
Level 2 \| Other Fixed Income Securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	33	26
Level 2 \| Fuel Derivatives, Net
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fuel derivatives, net	73	46
Level 3 \| Auction Rate Securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	108	116
Level 3 \| EETC
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
EETC	61	63
United Airlines, Inc. \| Cash and Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	3,532	4,765
United Airlines, Inc. \| Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	762	715
United Airlines, Inc. \| Corporate Debt
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	540	537
United Airlines, Inc. \| CDARS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	399	367
United Airlines, Inc. \| Auction Rate Securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	108	116
United Airlines, Inc. \| U.S. Government And Agency Notes
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	10	12
United Airlines, Inc. \| Other Fixed Income Securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	33	26
United Airlines, Inc. \| EETC
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
EETC	61	63
United Airlines, Inc. \| Fuel Derivatives, Net
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fuel derivatives, net	73	46
United Airlines, Inc. \| Restricted Cash
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Restricted cash	435	447
United Airlines, Inc. \| Convertible Debt Derivative Asset
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Convertible debt derivative asset	413	268
United Airlines, Inc. \| Convertible Debt Option Liability
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Convertible debt option liability	(209)	(128)
United Airlines, Inc. \| Level 1 \| Cash and Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	3,532	4,765
United Airlines, Inc. \| Level 1 \| Restricted Cash
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Restricted cash	435	447
United Airlines, Inc. \| Level 2 \| Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	762	715
United Airlines, Inc. \| Level 2 \| Corporate Debt
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	540	537
United Airlines, Inc. \| Level 2 \| CDARS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	399	367
United Airlines, Inc. \| Level 2 \| U.S. Government And Agency Notes
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	10	12
United Airlines, Inc. \| Level 2 \| Other Fixed Income Securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	33	26
United Airlines, Inc. \| Level 2 \| Fuel Derivatives, Net
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fuel derivatives, net	73	46
United Airlines, Inc. \| Level 3 \| Auction Rate Securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	108	116
United Airlines, Inc. \| Level 3 \| EETC
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
EETC	61	63
United Airlines, Inc. \| Level 3 \| Convertible Debt Derivative Asset
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Convertible debt derivative asset	413	268
United Airlines, Inc. \| Level 3 \| Convertible Debt Option Liability
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Convertible debt option liability	$ (209)	$ (128)

Activity for "Level Three" Financial Assets and Financial Liabilities (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Auction Rate Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 116	$ 113
Settlements	(10)
Realized	2
Reported in earnings-unrealized	1	(1)
Reported in other comprehensive income (loss)	(1)
Ending Balance	108	112
Auction Rate Securities \| United Airlines, Inc.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	116	113
Purchases, sales, issuances and settlements (net)	(10)
Realized	2
Unrealized	1	(1)
Reported in other comprehensive income (loss)	(1)
Ending Balance	108	112
EETC
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	63	60
Settlements	(2)	(2)
Reported in other comprehensive income (loss)		4
Ending Balance	61	62
EETC \| United Airlines, Inc.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	63	60
Purchases, sales, issuances and settlements (net)	(2)	(2)
Reported in other comprehensive income (loss)		4
Ending Balance	61	62
Convertible Debt Derivative Asset \| United Airlines, Inc.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	268	193
Unrealized	145	38
Ending Balance	413	231
Convertible Debt Option Liability \| United Airlines, Inc.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	(128)	(95)
Unrealized	(81)	(24)
Ending Balance	$ (209)	$ (119)

Financial Instruments and Fair Value Measurements - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2013 USD ($)
6% convertible junior subordinated debentures due 2030
Fair Value [Line Items]
Debt instrument convertible effective interest rate	6.00%
Debt instrument maturity year	2030
Four Point Five Percent Convertible Notes Due Two Thousand Fifteen
Fair Value [Line Items]
Debt instrument convertible effective interest rate	4.50%
Debt instrument maturity year	2015
Auction Rate Securities
Fair Value [Line Items]
Aggregate principal amount issued	$ 125
Debt instrument, interest rates reset interval	28 days
Auction Rate Securities \| Minimum
Fair Value [Line Items]
Debt instrument, maturity period	10 years
Debt instrument, interest rates reset interval	7 days
Auction Rate Securities \| Maximum
Fair Value [Line Items]
Debt instrument, interest rates reset interval	35 days
EETC
Fair Value [Line Items]
Investment securities, unrealized gains (losses)	$ 2

Carrying Values and Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 11,415
United Airlines, Inc.
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	11,070
Carrying (Reported) Amount, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	11,261	$ 12,252
Carrying (Reported) Amount, Fair Value Disclosure \| United Airlines, Inc.
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	10,862	11,850
Estimate of Fair Value, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	13,020	13,419
Estimate of Fair Value, Fair Value Disclosure \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	8,028	8,045
Estimate of Fair Value, Fair Value Disclosure \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	4,992	5,374
Estimate of Fair Value, Fair Value Disclosure \| United Airlines, Inc.
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	11,745	12,460
Estimate of Fair Value, Fair Value Disclosure \| United Airlines, Inc. \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	6,753	7,086
Estimate of Fair Value, Fair Value Disclosure \| United Airlines, Inc. \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 4,992	$ 5,374

Quantitative Information about Level 3 Fair Value Measurements (Detail)
$ in Millions

3 Months Ended

Mar. 31, 2013

USD ($)

Auction Rate Securities

Fair Value Measurements [Line Items]

Level 3 Financial Instruments, asset

$ 108

Valuation Technique

Discounted Cash Flows

Unobservable Input

Credit risk premium Illiquidity premium Expected repayments

^[1],[2],[3]

Auction Rate Securities | Minimum

Fair Value Measurements [Line Items]

Assumed repayment in years

2013

Auction Rate Securities | Maximum

Fair Value Measurements [Line Items]

Assumed repayment in years

2036

Auction Rate Securities | Credit Risk Premium

Fair Value Measurements [Line Items]

Level 3 fair value measurements, percentage

1.00%

Auction Rate Securities | Illiquidity Premium

Fair Value Measurements [Line Items]

Level 3 fair value measurements, percentage

5.00%

EETC

Fair Value Measurements [Line Items]

Level 3 Financial Instruments, asset

$ 61

Valuation Technique

Discounted Cash Flows

Unobservable Input

Structure credit risk

^[4]

EETC | Structure Credit Risk | Minimum

Fair Value Measurements [Line Items]

Level 3 fair value measurements, percentage

6.00%

Convertible Debt Derivative Asset

Fair Value Measurements [Line Items]

Level 3 Financial Instruments, asset

$ 413

Valuation Technique

Binomial Lattice Model

Unobservable Input

Expected volatility Own credit risk

^[5],[6]

Convertible Debt Derivative Asset | Expected Volatility

Fair Value Measurements [Line Items]

Level 3 fair value measurements, weighted average percentage

47.00%

Convertible Debt Derivative Asset | Expected Volatility | Minimum

Fair Value Measurements [Line Items]

Level 3 fair value measurements, percentage

45.00%

Convertible Debt Derivative Asset | Expected Volatility | Maximum

Fair Value Measurements [Line Items]

Level 3 fair value measurements, percentage

60.00%

Convertible Debt Derivative Asset | Own Credit Risk | Minimum

Fair Value Measurements [Line Items]

Level 3 fair value measurements, percentage

6.00%

Convertible Debt Option Liability

Fair Value Measurements [Line Items]

Level 3 Financial Instruments, liability

$ (209)

Valuation Technique

Binomial Lattice Model

Unobservable Input

Expected volatility Own credit risk

^[5],[6]

Convertible Debt Option Liability | Expected Volatility

Fair Value Measurements [Line Items]

Level 3 fair value measurements, weighted average percentage

47.00%

Convertible Debt Option Liability | Expected Volatility | Minimum

Fair Value Measurements [Line Items]

Level 3 fair value measurements, percentage

45.00%

Convertible Debt Option Liability | Expected Volatility | Maximum

Fair Value Measurements [Line Items]

Level 3 fair value measurements, percentage

60.00%

Convertible Debt Option Liability | Own Credit Risk | Minimum

Fair Value Measurements [Line Items]

Level 3 fair value measurements, percentage

6.00%

[1]	Represents the credit risk premium component of the discount rate that the Company has determined market participants would use in pricing the investments.
[2]	Represents the estimated timing of principal repayments used in the discounted cash flow model.
[3]	Represents the illiquidity premium component of the discount rate that the Company has determined market participants would use in pricing the investments.
[4]	Represents the credit risk premium of the EETC structure above the risk-free rate that the Company has determined market participants would use in pricing the instruments.
[5]	Represents the range in volatility estimates that the Company has determined market participants would use when pricing the instruments.
[6]	Represents the range of Company-specific risk adjustments that the Company has determined market participants would use as a model input.

Hedging Activities - Additional Information (Detail) gal in Millions	Mar. 31, 2013 gal
2013 Projected
Derivatives And Hedging Activities [Line Items]
Percentage of projected fuel requirements	32.00%
Volume of fuel hedging	963
2014 Projected
Derivatives And Hedging Activities [Line Items]
Percentage of projected fuel requirements	11.00%
Volume of fuel hedging	428

Description of Derivative Instruments (Detail) - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Fuel contracts, assets	$ 73	$ 51
Fuel contracts, liabilities		5
Receivables
Derivatives, Fair Value [Line Items]
Fuel contracts, assets	70	51
Other Liabilities Current
Derivatives, Fair Value [Line Items]
Fuel contracts, liabilities		4
Other Assets Noncurrent
Derivatives, Fair Value [Line Items]
Fuel contracts, assets	3
Other Liabilities Noncurrent
Derivatives, Fair Value [Line Items]
Fuel contracts, liabilities		1
Designated as Hedging Instrument \| Cash Flow Hedging \| Receivables
Derivatives, Fair Value [Line Items]
Fuel contracts, assets	19	7
Designated as Hedging Instrument \| Cash Flow Hedging \| Other Liabilities Current
Derivatives, Fair Value [Line Items]
Fuel contracts, liabilities		2
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Fuel contracts, assets	54	44
Fuel contracts, liabilities		3
Not Designated as Hedging Instrument \| Receivables
Derivatives, Fair Value [Line Items]
Fuel contracts, assets	51	44
Not Designated as Hedging Instrument \| Other Liabilities Current
Derivatives, Fair Value [Line Items]
Fuel contracts, liabilities		2
Not Designated as Hedging Instrument \| Other Assets Noncurrent
Derivatives, Fair Value [Line Items]
Fuel contracts, assets	$ 3
Not Designated as Hedging Instrument \| Other Liabilities Noncurrent
Derivatives, Fair Value [Line Items]
Fuel contracts, liabilities		$ 1

Schedule of Gains (Losses) on Derivative Instruments (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Designated as Hedging Instrument \| Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	$ (9)	$ 93
Gain (Loss) Reclassified from AOCI into Income (Fuel Expense) (Effective Portion)	(9)	(31)
Amount of Gain (Loss) Recognized in Income (Nonoperating Expense) (Ineffective Portion)		$ 25
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income (Nonoperating Expense)	$ 50

Schedule of Derivative Credit Risk and Fair Value (Detail)
$ in Millions

Mar. 31, 2013

USD ($)

Derivative [Line Items]

Net derivative asset with counterparties

$ 73

Collateral held by the Company

^[1]

Potential loss related to the failure of the Company's counterparties to perform

$ 73

[1]	Classified as an other current liability.

Commitments and Contingencies - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2013 USD ($) Employee AirCraft yr	Mar. 27, 2013 USD ($)
Commitments and Contingencies [Line Items]
Percentage of employees represented by various U.S. labor organizations	80.00%
United Airlines, Inc.
Commitments and Contingencies [Line Items]
Number of employees \| Employee	88,000
Floating Rate Debt
Commitments and Contingencies [Line Items]
Debt instrument principal amount \| $	$ 2,100
Notes payable, fixed interest rates of 4.00% to 12.00% (weighted average rate of 6.96% as of December 31, 2012), payable through 2024
Commitments and Contingencies [Line Items]
Debt instrument principal amount \| $	327
Loans And Leases From Non U S Entities
Commitments and Contingencies [Line Items]
Debt instrument principal amount \| $	2,400
Tax-exempt special facilities revenue bonds
Commitments and Contingencies [Line Items]
Guarantor obligations, maximum exposure \| $	1,900
Operating leases obligations \| $	1,700
Capital leases obligations \| $	$ 190
Capital Addition Purchase Commitments \| United Airlines, Inc.
Commitments and Contingencies [Line Items]
Number of new aircraft committed to purchase	149
Capital Addition Purchase Commitments \| Boeing 737
Commitments and Contingencies [Line Items]
Number of new aircraft committed to purchase	100
Number of new aircraft under purchase rights and options	100
Capital Addition Purchase Commitments \| Boeing 737 \| United Airlines, Inc.
Commitments and Contingencies [Line Items]
Number of new aircraft committed to purchase	75
Capital Addition Purchase Commitments \| 787 Boeing AirCraft
Commitments and Contingencies [Line Items]
Number of aircraft under financing arrangement expected to be delivered	1
Capital Addition Purchase Commitments \| 787 Boeing AirCraft \| United Airlines, Inc.
Commitments and Contingencies [Line Items]
Number of new aircraft committed to purchase	49
Number of aircraft expected to be delivered	2
Capital Addition Purchase Commitments \| Airbus A350XWB aircraft \| United Airlines, Inc.
Commitments and Contingencies [Line Items]
Number of new aircraft committed to purchase	25
Capital Addition Purchase Commitments \| Boeing 737-900ER AirCraft
Commitments and Contingencies [Line Items]
Number of aircraft under financing arrangement expected to be delivered	14
Number of aircraft under financing arrangement delivered	6
Number of aircraft under financing arrangement expected to be delivered during the reminder of 2013	8
Capital Addition Purchase Commitments \| Boeing 737-900ER AirCraft \| United Airlines, Inc.
Commitments and Contingencies [Line Items]
Number of aircraft delivered	6
Number of aircraft expected to be delivered	18
Revolving Credit Facility
Commitments and Contingencies [Line Items]
Borrowing capacity under revolving credit facility \| $		$ 1,000
Capacity available under the revolving credit facility \| $		$ 1,000
Minimum \| Tax-exempt special facilities revenue bonds
Commitments and Contingencies [Line Items]
Debt instrument, maturity year	2015
Minimum \| Capital Addition Purchase Commitments \| United Airlines, Inc.
Commitments and Contingencies [Line Items]
New aircraft, scheduled delivery date	Apr. 01, 2013
Minimum \| Capital Addition Purchase Commitments \| Boeing 737
Commitments and Contingencies [Line Items]
New aircraft, scheduled delivery date	2018
Maximum
Commitments and Contingencies [Line Items]
Debt instrument, remaining terms (years) \| yr	9
Maximum \| Loans And Leases From Non U S Entities
Commitments and Contingencies [Line Items]
Debt instrument, remaining terms (years) \| yr	8
Maximum \| Tax-exempt special facilities revenue bonds
Commitments and Contingencies [Line Items]
Debt instrument, maturity year	2038
Maximum \| Capital Addition Purchase Commitments \| United Airlines, Inc.
Commitments and Contingencies [Line Items]
New aircraft, scheduled delivery date	2020
Maximum \| Capital Addition Purchase Commitments \| Boeing 737
Commitments and Contingencies [Line Items]
New aircraft, scheduled delivery date	2022

Schedule of Acquisition of Aircrafts and Related Spare Engines (Detail) $ in Billions	Mar. 31, 2013 USD ($)
Commitments and Contingencies Disclosure [Line Items]
2013	$ 1.6
2014	1.9
2015	1.9
2016	3.0
2017	2.5
After 2017	6.8
Total commitments	$ 17.7

Debt - Additional Information (Detail) $ in Millions	1 Months Ended		3 Months Ended		12 Months Ended
Debt - Additional Information (Detail) $ in Millions	Mar. 27, 2013 USD ($)	Oct. 31, 2012 USD ($)	Mar. 31, 2013 USD ($)	Mar. 31, 2012 USD ($)	Dec. 31, 2012 USD ($)	Apr. 01, 2013 USD ($)	Feb. 08, 2013 USD ($)	Feb. 01, 2013 USD ($)
Debt Instrument [Line Items]
Interest on principal amount			0.25%
Commencement date of installment payment			Jun. 30, 2013
Debt instrument, maturity date			Apr. 01, 2019
Commitment fee percentage			0.75%
Unrestricted liquidity requirement			$ 3,000
Minimum ratio of appraised value of collateral to the outstanding obligations			1.67
Proceeds from issuance of long-term debt			$ 109	$ 86
9.875% Senior Notes Due 2013
Debt Instrument [Line Items]
Aggregate principal amount								$ 400
Debt instrument maturity year								2013
Debt instrument stated interest rate								9.875%
12% Second Lien Due 2013
Debt Instrument [Line Items]
Aggregate principal amount								$ 200
Debt instrument maturity year								2013
Debt instrument stated interest rate								12.00%
Class B Pass Through Certificates
Debt Instrument [Line Items]
Aggregate principal amount							$ 123
Debt instrument maturity year							2013
Class A Pass Through Certificates and Class B Pass Through Certificates
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt		$ 844	201
Class C Pass Through Certificates
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt			$ 54		$ 425
Subsequent Event \| Senior tranche \| Settlement of Debt
Debt Instrument [Line Items]
Aggregate principal amount						$ 180
Debt instrument maturity year						2013
LIBOR
Debt Instrument [Line Items]
Debt instrument, floor rate			1.00%
Debt instrument, basis spread on variable rate			3.00%
Certain Market Interest Rates
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate			2.00%
United Airlines, Inc.
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt			$ 109	$ 86
United Airlines, Inc. \| Class B Pass Through Certificates
Debt Instrument [Line Items]
Aggregate principal amount		$ 132
Debt instrument stated interest rate		5.50%
United Airlines, Inc. \| Class A Pass Through Certificates
Debt Instrument [Line Items]
Aggregate principal amount		$ 712
Debt instrument stated interest rate		4.00%
United Airlines, Inc. \| Class A Pass Through Certificates and Class B Pass Through Certificates
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt			494
United Airlines, Inc. \| Class C Pass Through Certificates
Debt Instrument [Line Items]
Aggregate principal amount					$ 425
Debt instrument stated interest rate					6.125%
Proceeds from issuance of long-term debt			$ 331
Term Loan Facility
Debt Instrument [Line Items]
Credit Agreement	$ 900
Debt instrument maturity date	Apr. 01, 2019
Amount utilized to repay term loan	$ 900
Revolving Credit Facility
Debt Instrument [Line Items]
Credit Agreement	$ 1,000
Debt instrument maturity date	Apr. 01, 2018
Available under revolving credit facility	$ 1,000
Line of credit maximum borrowing capacity	500
Amended Credit Facility
Debt Instrument [Line Items]
Cash utilized to repay term loan	300
Aggregate principal amount	$ 1,200
Debt instrument maturity year	2014

Contractual Principal Payments Under then-Outstanding Long Term Debt (Detail) $ in Millions	Mar. 31, 2013 USD ($)
Debt Instrument [Line Items]
Last nine months of 2013	$ 859
2014	958
2015	2,044
2016	1,003
2017	566
After 2017	5,985
Long-term debt	11,415
United Airlines, Inc.
Debt Instrument [Line Items]
Last nine months of 2013	859
2014	958
2015	2,044
2016	1,003
2017	566
After 2017	5,640
Long-term debt	$ 11,070

Components of Special Charges (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Special Charges [Line Items]
Merger integration-related costs	$ 70	$ 134
Voluntary severance and benefits	14	49
Charges for temporarily grounded 787 aircraft	11
Gains on sale of assets and other special items, net	(3)	(19)
Subtotal special charges	92	164
Income tax benefit		(2)
Total special charges, net of income taxes	$ 92	$ 162

Special Items - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2013 USD ($) AirCraft	Mar. 31, 2012 USD ($)
Special Charges [Line Items]
Severance and benefits	$ 14	$ 49
Number of flight attendants voluntarily on leave	1,300	1,800
Temporary grounding of 787 aircraft charges	$ 11
Gain related to contract termination	5
Loss on sale of asset	$ 2
Number of mechanics offering to retire early		400
Number of aircraft that the company operate \| AirCraft	133
Number of aircraft to be sold \| AirCraft	30
Depreciation	$ 12
Expected depreciation for full year of 2013	80
Accrual severance and medical costs	62	$ 90
Accrual balance of future lease	$ 5	$ 23

Components of Accumulated Other Comprehensive Income (loss), Net of Tax (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	$ (1,046)	$ (417)
Other comprehensive income before reclassifications	(11)	102
Amounts reclassified from accumulated other comprehensive income	30	35
Net current-period other comprehensive income	19	137
Ending Balance	(1,027)	(280)
United Airlines, Inc.
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(1,053)	(425)
Other comprehensive income before reclassifications	(10)	103
Amounts reclassified from accumulated other comprehensive income	36	35
Net current-period other comprehensive income	26	138
Ending Balance	(1,027)	(287)
Accumulated Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(1,042)	(312)
Amounts reclassified from accumulated other comprehensive income	21	4
Net current-period other comprehensive income	21	4
Ending Balance	(1,021)	(308)
Accumulated Defined Benefit Plans Adjustment \| United Airlines, Inc.
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(1,042)	(312)
Amounts reclassified from accumulated other comprehensive income	21	4
Net current-period other comprehensive income	21	4
Ending Balance	(1,021)	(308)
Accumulated Net Unrealized Investment Gain (Loss)
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(10)	(99)
Other comprehensive income before reclassifications	(9)	93
Amounts reclassified from accumulated other comprehensive income	9	31
Net current-period other comprehensive income		124
Ending Balance	(10)	25
Accumulated Net Unrealized Investment Gain (Loss) \| United Airlines, Inc.
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(10)	(99)
Other comprehensive income before reclassifications	(9)	93
Amounts reclassified from accumulated other comprehensive income	9	31
Net current-period other comprehensive income		124
Ending Balance	(10)	25
Other Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	6	(6)
Other comprehensive income before reclassifications	(2)	9
Net current-period other comprehensive income	(2)	9
Ending Balance	4	3
Other Accumulated Other Comprehensive Income \| United Airlines, Inc.
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	5	(8)
Other comprehensive income before reclassifications	(1)	10
Net current-period other comprehensive income	(1)	10
Ending Balance	4	2
Income Tax Benefit Expense \| United Airlines, Inc.
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(6)	(6)
Amounts reclassified from accumulated other comprehensive income	6
Net current-period other comprehensive income	$ 6
Ending Balance		$ (6)

Details about Accumulated Other Comprehensive Income Components (Detail) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2013

Mar. 31, 2012

Salaries And Related Costs

Accumulated Other Comprehensive Income [Line Items]

Amortization of unrecognized loss and prior service cost

^[1]

$ 21

$ 4

^[2]

Accumulated Other Comprehensive Income [Line Items]

Amortization of unrecognized loss and prior service cost

^[1]

^[2]

Income Tax Benefit Expense | United Airlines, Inc.

Accumulated Other Comprehensive Income [Line Items]

Income tax expense on other comprehensive income

Fuel Oil Contract | Cash Flow Hedging | Aircraft Fuel

Accumulated Other Comprehensive Income [Line Items]

Fuel contracts-reclassifications of losses into earnings

^[1]

Fuel Oil Contract | Cash Flow Hedging | Aircraft Fuel | United Airlines, Inc.

Accumulated Other Comprehensive Income [Line Items]

Fuel contracts-reclassifications of losses into earnings

^[1]

$ 9

$ 31

[1]	Income tax expense offset by Company's valuation allowance.
[2]	This accumulated other comprehensive income component is included in the computation of net periodic pension costs (see Note 5 of this report for additional details.)