Guarantor Condensed Consolidating Financial Statements Guarantor Cash Flows (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	$ 2,618	$ 1,265
Cash flows from investing activities
Purchases of retail finance receivables, net	(8,343)	(8,366)
Principal collections and recoveries on retail finance receivables	6,641	5,716
Proceeds from transfer of retail finance receivables, net	0	0
Net funding of commercial finance receivables	(1,362)	(37)
Purchases of leased vehicles, net	(10,196)	(6,724)
Proceeds from termination of leased vehicles	1,090	468
Acquisition of international operations	0	(1,049)
Disposition of equity interest	0	125
Purchases of property and equipment	(47)	(44)
Change in restricted cash	(72)	(140)
Change in other assets	(4)	17
Net change in due from affiliates	0	0
Net change in investment in affiliates	0	0
Net cash used in investing activities	(12,293)	(10,034)
Cash flows from financing activities
Net change in debt (original maturities less than three months)	405	(150)
Borrowings and issuance of secured debt	13,847	9,791
Payments on secured debt	(10,039)	(7,406)
Borrowings and issuance of unsecured debt	7,306	6,697
Payments on unsecured debt	(1,758)	(871)
Net capital contributions	0	0
Debt issuance costs	(83)	(101)
Net change in due to affiliates	0	0
Net cash provided by financing activities	9,678	7,960
Net increase (decrease) in cash and cash equivalents	3	(809)
Effect of foreign exchange rate changes on cash and cash equivalents	38	(95)
Cash and cash equivalents at beginning of period	3,061	2,974
Cash and cash equivalents at end of period	3,102	2,070
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	(218)	(102)
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
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
Change in other assets	0	0
Net change in due from affiliates	(4,503)	(3,983)
Net change in investment in affiliates	6	(6)
Net cash used in investing activities	(4,497)	(4,502)
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	5,740	4,640
Payments on unsecured debt	(1,000)	0
Net capital contributions	0	0
Debt issuance costs	(25)	(36)
Net change in due to affiliates	0	0
Net cash provided by financing activities	4,715	4,604
Net increase (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	(151)	150
Cash flows from investing activities
Purchases of retail finance receivables, net	(8,110)	(5,684)
Principal collections and recoveries on retail finance receivables	780	246
Proceeds from transfer of retail finance receivables, net	5,250	3,380
Net funding of commercial finance receivables	(124)	139
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	(35)	(12)
Change in restricted cash	46	(13)
Change in other assets	(139)	0
Net change in due from affiliates	(2,958)	(3,225)
Net change in investment in affiliates	723	(355)
Net cash used in investing activities	(4,567)	(5,935)
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	4,668	4,680
Net cash provided by financing activities	4,668	4,680
Net increase (decrease) in cash and cash equivalents	(50)	(1,105)
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	2,209	1,161
Non-Guarantors [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	2,987	1,217
Cash flows from investing activities
Purchases of retail finance receivables, net	(8,423)	(6,823)
Principal collections and recoveries on retail finance receivables	5,861	5,470
Proceeds from transfer of retail finance receivables, net	2,940	761
Net funding of commercial finance receivables	(1,238)	(176)
Purchases of leased vehicles, net	(10,196)	(6,724)
Proceeds from termination of leased vehicles	1,090	468
Acquisition of international operations		0
Disposition of equity interest		0
Purchases of property and equipment	(12)	(32)
Change in restricted cash	(118)	(127)
Change in other assets	(4)	17
Net change in due from affiliates	0	0
Net change in investment in affiliates	0	0
Net cash used in investing activities	(10,100)	(7,166)
Cash flows from financing activities
Net change in debt (original maturities less than three months)	405	(150)
Borrowings and issuance of secured debt	13,986	9,791
Payments on secured debt	(10,039)	(7,406)
Borrowings and issuance of unsecured debt	1,566	2,057
Payments on unsecured debt	(758)	(871)
Net capital contributions	(729)	361
Debt issuance costs	(58)	(65)
Net change in due to affiliates	2,793	2,528
Net cash provided by financing activities	7,166	6,245
Net increase (decrease) in cash and cash equivalents	53	296
Effect of foreign exchange rate changes on cash and cash equivalents	38	(95)
Cash and cash equivalents at beginning of period	802	708
Cash and cash equivalents at end of period	893	909
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	8,190	4,141
Principal collections and recoveries on retail finance receivables	0	0
Proceeds from transfer of retail finance receivables, net	(8,190)	(4,141)
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
Change in other assets	139	0
Net change in due from affiliates	7,461	7,208
Net change in investment in affiliates	(729)	361
Net cash used in investing activities	6,871	7,569
Cash flows from financing activities
Net change in debt (original maturities less than three months)	0	0
Borrowings and issuance of secured debt	(139)	0
Payments on secured debt	0	0
Borrowings and issuance of unsecured debt	0	0
Payments on unsecured debt	0	0
Net capital contributions	729	(361)
Debt issuance costs	0	0
Net change in due to affiliates	(7,461)	(7,208)
Net cash provided by financing activities	(6,871)	(7,569)
Net increase (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