Finance Assets, Net (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Finance assets, net	$ 2,345		$ 2,345		$ 2,581
Gross investments in finance leases	2,397		2,397		2,680
Other receivable	21		21
Investments in financial leases, allowance for losses	52	188	52	188	99	227
Allowance for Loan and Lease Losses, Adjustments, Net	(27)		(47)	(10)
Decrease to Allowance		(10)
Finance Leases [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investments in finance leases	2,376		2,376
Amounts Written-Off [Member] | American Airlines [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Decrease to Allowance				$ (29)