Net Investments in Operating Leases (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Property Subject to or Available for Operating Lease [Line Items]
Length of lease contract	60 months or less
Vehicles, at cost, including initial direct costs	$ 21,784	$ 21,092
Less: Accumulated depreciation	(2,928)	(2,792)
Net investment in operating leases before allowance for credit losses	18,856	18,300	14,693
Less: Allowance for credit losses	(24)	(23)	(22)	(23)
Net investment in operating leases	18,832	18,277	14,671
Securitization Transactions [Member]
Property Subject to or Available for Operating Lease [Line Items]
Net investment in operating leases	$ 9,600	$ 8,100