Guarantor Condensed Consolidating Financial Statements - Guarantor Cash Flows (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	$ 3,856	$ 2,167
Cash flows from investing activities
Purchases of retail finance receivables, net	(13,252)	(13,099)
Principal collections and recoveries on retail finance receivables	9,904	8,718
Proceeds from transfer of retail finance receivables, net	0	0
Net funding of commercial finance receivables	(1,682)	(179)
Purchases of leased vehicles, net	(15,030)	(11,258)
Proceeds from termination of leased vehicles	1,801	662
Acquisition of international operations	0	(1,049)
Disposition of equity interest	0	125
Purchases of property and equipment	(71)	(64)
Change in restricted cash	(123)	(236)
Other investing activities	(3)	24
Net change in due from affiliates	0	0
Net change in investment in affiliates	0	0
Net cash used in investing activities	(18,456)	(16,356)
Cash flows from financing activities
Net change in debt (original maturities less than three months)	497	539
Borrowings and issuance of secured debt	19,404	15,095
Payments on secured debt	(14,599)	(10,903)
Borrowings and issuance of unsecured debt	11,299	9,559
Payments on unsecured debt	(2,386)	(1,195)
Net capital contributions	0	0
Debt issuance costs	(119)	(124)
Net change in due to affiliates	0	0
Net cash provided by financing activities	14,096	12,971
Net decrease in cash and cash equivalents	(504)	(1,218)
Effect of foreign exchange rate changes on cash and cash equivalents	31	(154)
Cash and cash equivalents at beginning of period	3,061	2,974
Cash and cash equivalents at end of period	2,588	1,602
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	(469)	(184)
Cash flows from investing activities
Purchases of retail finance receivables, net	0	0
Principal collections and recoveries on retail finance receivables	0	0
Proceeds from transfer of retail finance receivables, net	0	0
Net funding of commercial finance receivables	0	0
Purchases of leased vehicles, net	0	0
Proceeds from termination of leased vehicles	0	0
Acquisition of international operations		(513)
Disposition of equity interest		0
Purchases of property and equipment	0	0
Change in restricted cash	0	0
Other investing activities		0
Net change in due from affiliates	(7,506)	(6,189)
Net change in investment in affiliates	24	(6)
Net cash used in investing activities	(7,482)	(6,708)
Cash flows from financing activities
Net change in debt (original maturities less than three months)	1	0
Borrowings and issuance of secured debt	0	0
Payments on secured debt	0	0
Borrowings and issuance of unsecured debt	8,987	6,939
Payments on unsecured debt	(1,000)	0
Net capital contributions	0	0
Debt issuance costs	(37)	(47)
Net change in due to affiliates	0	0
Net cash provided by financing activities	7,951	6,892
Net decrease in cash and cash equivalents	0	0
Effect of foreign exchange rate changes on cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	0
Guarantor [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	(379)	314
Cash flows from investing activities
Purchases of retail finance receivables, net	(12,676)	(9,045)
Principal collections and recoveries on retail finance receivables	1,274	414
Proceeds from transfer of retail finance receivables, net	8,232	6,939
Net funding of commercial finance receivables	(335)	172
Purchases of leased vehicles, net	0	0
Proceeds from termination of leased vehicles	0	0
Acquisition of international operations		(536)
Disposition of equity interest		125
Purchases of property and equipment	(50)	(22)
Change in restricted cash	41	(20)
Other investing activities	(169)	0
Net change in due from affiliates	(6,621)	(3,973)
Net change in investment in affiliates	2,473	(2,644)
Net cash used in investing activities	(7,831)	(8,590)
Cash flows from financing activities
Net change in debt (original maturities less than three months)	0	0
Borrowings and issuance of secured debt	0	0
Payments on secured debt	0	0
Borrowings and issuance of unsecured debt	0	0
Payments on unsecured debt	0	0
Net capital contributions	0	0
Debt issuance costs	0	0
Net change in due to affiliates	7,643	6,844
Net cash provided by financing activities	7,643	6,844
Net decrease in cash and cash equivalents	(567)	(1,432)
Effect of foreign exchange rate changes on cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	2,259	2,266
Cash and cash equivalents at end of period	1,692	834
Non-Guarantors [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	4,704	2,037
Cash flows from investing activities
Purchases of retail finance receivables, net	(12,891)	(11,938)
Principal collections and recoveries on retail finance receivables	8,630	8,304
Proceeds from transfer of retail finance receivables, net	4,083	945
Net funding of commercial finance receivables	(1,347)	(351)
Purchases of leased vehicles, net	(15,030)	(11,258)
Proceeds from termination of leased vehicles	1,801	662
Acquisition of international operations		0
Disposition of equity interest		0
Purchases of property and equipment	(21)	(42)
Change in restricted cash	(164)	(216)
Other investing activities	(3)	24
Net change in due from affiliates	0	0
Net change in investment in affiliates	0	0
Net cash used in investing activities	(14,942)	(13,870)
Cash flows from financing activities
Net change in debt (original maturities less than three months)	496	539
Borrowings and issuance of secured debt	19,573	15,095
Payments on secured debt	(14,599)	(10,903)
Borrowings and issuance of unsecured debt	2,312	2,620
Payments on unsecured debt	(1,386)	(1,195)
Net capital contributions	(2,497)	2,650
Debt issuance costs	(82)	(77)
Net change in due to affiliates	6,484	3,318
Net cash provided by financing activities	10,301	12,047
Net decrease in cash and cash equivalents	63	214
Effect of foreign exchange rate changes on cash and cash equivalents	31	(154)
Cash and cash equivalents at beginning of period	802	708
Cash and cash equivalents at end of period	896	768
Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	0	0
Cash flows from investing activities
Purchases of retail finance receivables, net	12,315	7,884
Principal collections and recoveries on retail finance receivables	0	0
Proceeds from transfer of retail finance receivables, net	(12,315)	(7,884)
Net funding of commercial finance receivables	0	0
Purchases of leased vehicles, net	0	0
Proceeds from termination of leased vehicles	0	0
Acquisition of international operations		0
Disposition of equity interest		0
Purchases of property and equipment	0	0
Change in restricted cash	0	0
Other investing activities	169	0
Net change in due from affiliates	14,127	10,162
Net change in investment in affiliates	(2,497)	2,650
Net cash used in investing activities	11,799	12,812
Cash flows from financing activities
Net change in debt (original maturities less than three months)	0	0
Borrowings and issuance of secured debt	(169)	0
Payments on secured debt	0	0
Borrowings and issuance of unsecured debt	0	0
Payments on unsecured debt	0	0
Net capital contributions	2,497	(2,650)
Debt issuance costs	0	0
Net change in due to affiliates	(14,127)	(10,162)
Net cash provided by financing activities	(11,799)	(12,812)
Net decrease in cash and cash equivalents	0	0
Effect of foreign exchange rate changes on cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	$ 0	$ 0