Investments in Operating Leases, Net (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013
Property Subject to or Available for Operating Lease [Line Items]
Allowance for credit losses	$ (445)	$ (447)	$ (454)	$ (467)	$ (501)	$ (527)
Finance Receivables, Net [Member]
Property Subject to or Available for Operating Lease [Line Items]
Allowance for credit losses	(381)	(381)	(386)	(396)	(424)	(445)
Investments In Operating Leases, Net [Member]
Property Subject to or Available for Operating Lease [Line Items]
Investments in operating leases	35,654		31,271
Deferred origination fees	(177)		(146)
Deferred income	(986)		(826)
Accumulated depreciation	(5,991)		(5,462)
Allowance for credit losses	(64)		(68)
Investments in operating leases, net	28,436		24,769
Investments In Operating Leases, Net [Member] | Securitized investments in operating leases [Member]
Property Subject to or Available for Operating Lease [Line Items]
Investments in operating leases	0		248
Investments In Operating Leases, Net [Member] | Investments in operating leases [Member]
Property Subject to or Available for Operating Lease [Line Items]
Investments in operating leases	$ 35,654		$ 31,023