v2.4.0.6
Document and Entity Information
12 Months Ended
Dec. 31, 2012
Document Information [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Dec. 31, 2012
Trading Symbol UAL
Entity Registrant Name United Continental Holdings, Inc.
Entity Central Index Key 0000100517
United Airlines, Inc.
 
Document Information [Line Items]  
Entity Registrant Name United Airlines, Inc.
Entity Central Index Key 0000319687