Finance Assets, Net (Narrative) (Details) (USD $) In Millions, unless otherwise specified						3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2013 Finance Leases [Member]	Mar. 31, 2013 Management Assessment [Member]	Mar. 31, 2012 Management Assessment [Member]	Mar. 31, 2013 Amounts Written-Off [Member]	Mar. 31, 2012 Amounts Written-Off [Member]	Mar. 31, 2012 Amounts Written-Off [Member] American Airlines, Inc. [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Financial Services Assets Lease Receivables	$ 2,385	$ 2,581
Finance assets, net	2,385	2,581
Gross investments in finance leases	2,464	2,680			2,422
Other receivable	42
Investments in financial leases, allowance for losses	79	99	204	227
Decrease to Allowance						$ (20)	$ 0	$ 0	$ (23)	$ (23)