Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Statement of Cash Flows [Abstract]
Net cash provided by operating activities	$ 2,167	$ 1,400
Cash flows from investing activities:
Purchases of consumer finance receivables, net	(13,099)	(10,850)
Principal collections and recoveries on consumer finance receivables	8,718	8,124
Net funding of commercial finance receivables	(179)	(408)
Purchases of leased vehicles, net	(11,258)	(3,227)
Proceeds from termination of leased vehicles	662	395
Acquisition of international operations	(1,049)	(46)
Disposition of equity interest	125	0
Purchases of property and equipment	(64)	(37)
Change in restricted cash	(236)	(187)
Change in other assets	24	(2)
Net cash used in investing activities	(16,356)	(6,238)
Cash flows from financing activities:
Net change in debt (original maturities less than three months)	539	(913)
Borrowings and issuance of secured debt	15,095	15,847
Payments on secured debt	(10,903)	(13,568)
Borrowings and issuance of unsecured debt	9,559	5,403
Payments on unsecured debt	(1,195)	(1,339)
Debt issuance costs	(124)	(107)
Net cash provided by financing activities	12,971	5,323
Net (decrease) increase in cash and cash equivalents	(1,218)	485
Effect of foreign exchange rate changes on cash and cash equivalents	(154)	(42)
Cash and cash equivalents at beginning of period	2,974	1,074
Cash and cash equivalents at end of period	1,602	1,517
Supplemental cash flow information:
Subvention receivable from GM	405	164
Commercial loan funding payable to GM	$ 498	$ 597