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Related Party Transactions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2011
Related Party Transaction [Line Items]
Total net revenue allocated from United to Continental	$ 332	$ 760
Total net expenses allocated from United to Continental	109	232
Continental Airlines Inc
Related Party Transaction [Line Items]
Payment to related parties	196	317
Net current payables to related parties	2,486	2,486	11
Non-current payables to related parties	448	448
United Air Lines Inc
Related Party Transaction [Line Items]
Payment to related parties	61	155
Net current payables to related parties	$ 105	$ 105	$ 104

Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Amount of receivables owed to an entity that is affiliated with the reporting entity by means of direct or indirect ownership, which are usually due after one year (or one business cycle, if longer).

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