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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
United Airlines Inc \| EETC
Fair Value [Line Items]
Debt instrument, amortized cost basis	$ 64
Investment securities, unrealized gains (losses)	1
Continental Airlines Inc \| Auction Rate Securities
Fair Value [Line Items]
Auction rate securities, par value	135
Debt instrument, amortized cost basis	$ 112
Debt instrument, interest rates reset interval	28 days
Continental Airlines Inc \| Auction Rate Securities \| Minimum
Fair Value [Line Items]
Debt instrument, maturity period	10 years
Debt instrument, interest rates reset interval	7 days
Continental Airlines Inc \| Auction Rate Securities \| Maximum
Fair Value [Line Items]
Debt instrument, interest rates reset interval	35 days

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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