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Employee Benefit Plans - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
9 Months Ended 1 Months Ended
Sep. 30, 2012
Day
Sep. 30, 2012
Continental Airlines Inc
Oct. 31, 2012
Subsequent Event
Continental Airlines Inc
Feb. 29, 2012
Restricted Stock
Feb. 29, 2012
Restricted Stock Units (RSUs)
Feb. 29, 2012
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Employer contribution to tax-qualified defined benefit pension plans   $ 167 $ 41      
Number of days used to compute performance period average closing price of restricted stock units 20          
Share-Based Compensation, award granted       0.5 0.6 1.3
Share-Based Compensation, vesting period       3 years 3 years 3 years
Share-Based Compensation, vesting date           Dec. 31, 2014
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