Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities
Net income	$ 646	$ 537	$ 566
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	2,403	992	545
Accretion and amortization of loan and leasing fees	(609)	(363)	(88)
Amortization of carrying value adjustment	(149)	(234)	(94)
Equity income	(116)	0	0
Provision for loan losses	624	604	475
Deferred income taxes	132	(83)	179
Stock-based compensation expense	36	19	9
Other	(37)	182	(167)
Changes in assets and liabilities, net of assets and liabilities acquired:
Other assets	(104)	(88)	(127)
Accounts payable and accrued expenses	282	133	195
Taxes payable	(20)	(63)	20
Related party taxes payable	(636)	(7)	84
Related party payables	(13)	5	(39)
Net cash provided by operating activities	2,439	1,634	1,558
Cash flows from investing activities
Purchases of retail finance receivables, net	(17,517)	(14,749)	(9,573)
Principal collections and recoveries on retail finance receivables	11,726	10,860	7,524
Net funding of commercial finance receivables	(1,017)	(1,898)	(1,266)
Purchases of leased vehicles, net	(15,337)	(4,882)	(2,262)
Proceeds from termination of leased vehicles	1,096	533	217
Acquisition of international operations	(1,049)	(46)	(2,615)
Disposition of equity interest	125	0	0
Purchases of property and equipment	(90)	(52)	(16)
Change in restricted cash	(264)	(232)	(267)
Change in other assets	30	(2)	3
Net cash used in investing activities	(22,297)	(10,468)	(8,255)
Cash flows from financing activities
Net change in debt (original maturities less than three months)	1,147	470	0
Borrowings and issuance of secured debt	22,385	21,080	17,378
Payments on secured debt	(15,178)	(16,890)	(13,222)
Borrowings and issuance of unsecured debt	12,977	7,174	5,224
Payments on unsecured debt	(1,709)	(1,889)	(2,699)
Borrowings on related party line of credit	0	0	1,100
Payments on related party line of credit	0	0	(1,100)
Repayment of debt to Ally Financial	0	0	(1,416)
Capital contributions from related party	649	996	1,300
Debt issuance costs	(155)	(127)	(76)
Other	1	0	2
Net cash provided by financing activities	20,117	10,814	6,491
Net increase (decrease) in cash and cash equivalents	259	1,980	(206)
Effect of foreign exchange rate changes on cash and cash equivalents	(172)	(80)	(9)
Cash and cash equivalents at beginning of period	2,974	1,074	1,289
Cash and cash equivalents at end of period	$ 3,061	$ 2,974	$ 1,074