Finance Assets, Net (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				0 Months Ended		3 Months Ended
	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011	Dec. 31, 2010	Feb. 10, 2012 American Airlines, Inc. [Member]	Mar. 31, 2012 American Airlines, Inc. [Member]	Mar. 31, 2012 American Airlines, Inc. [Member] Aircraft [Member]	Feb. 10, 2012 American Airlines, Inc. [Member] Aircraft [Member]	Mar. 31, 2012 Finance Leases [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Finance assets, net	$ 3,247	$ 3,559
Gross investments in finance leases	3,451	3,786							3,392
Other receivable	59
Investments in financial leases, allowance for losses	204	227	202	202
Number of aircraft leases							28
Investment in finance leases							140
Number of leases rejected								9
Allowance for losses written-off on investments in finance leases	23				23
Deferred taxes subject to acceleration in the event of foreclosure						$ 22