v2.4.0.6
Document and Entity Information
3 Months Ended
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