Guarantor Condensed Consolidating Financial Statements - Guarantor Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Dec. 31, 2016
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	$ 1,416	$ 1,158
Cash flows from investing activities
Purchases of retail finance receivables, net	(6,401)	(4,165)
Principal collections and recoveries on retail finance receivables	3,595	3,271
Proceeds from transfer of retail finance receivables, net	0	0
Net funding of commercial finance receivables	(541)	(1,024)
Purchases of leased vehicles, net	(4,794)	(5,158)
Proceeds from termination of leased vehicles	1,082	481
Purchases of property and equipment	(24)	(20)
Other investing activities	0	1
Net change in due from affiliates	0	0
Net change in investment in affiliates	0	0
Net cash used in investing activities	(7,083)	(6,614)
Cash flows from financing activities
Net change in debt (original maturities less than three months)	(268)	757
Borrowings and issuance of secured debt	8,361	7,054
Payments on secured debt	(4,805)	(5,251)
Borrowings and issuance of unsecured debt	2,968	3,131
Payments on unsecured debt	(574)	(241)
Debt issuance costs	(27)	(26)
Net capital contributions	0	0
Net change in due to affiliates	0	0
Net cash provided by financing activities	5,655	5,424
Net decrease in cash, cash equivalents and restricted cash	(12)	(32)
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	37	58
Cash, cash equivalents and restricted cash at beginning of period	5,302	5,002
Cash, cash equivalents and restricted cash at end of period	5,327	5,028
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents			$ 2,694	$ 3,201
Restricted cash included in other assets			2,633
Total	5,302	5,002	5,327	5,302
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	(273)	(144)
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
Purchases of property and equipment	0	0
Other investing activities	0	0
Net change in due from affiliates	(2,230)	(2,587)
Net change in investment in affiliates	0	0
Net cash used in investing activities	(2,230)	(2,587)
Cash flows from financing activities
Net change in debt (original maturities less than three months)	17	0
Borrowings and issuance of secured debt	0	0
Payments on secured debt	0	0
Borrowings and issuance of unsecured debt	2,497	2,744
Payments on unsecured debt	0	0
Debt issuance costs	(11)	(13)
Net capital contributions	0	0
Net change in due to affiliates	0	0
Net cash provided by financing activities	2,503	2,731
Net decrease in cash, cash equivalents and restricted cash	0	0
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	0	0
Cash, cash equivalents and restricted cash at beginning of period	0	0
Cash, cash equivalents and restricted cash at end of period	0	0
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents			0	0
Restricted cash included in other assets			0
Total	0	0	0	0
Guarantor [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	103	(537)
Cash flows from investing activities
Purchases of retail finance receivables, net	(4,920)	(4,466)
Principal collections and recoveries on retail finance receivables	450	359
Proceeds from transfer of retail finance receivables, net	2,095	2,866
Net funding of commercial finance receivables	(194)	(227)
Purchases of leased vehicles, net	0	0
Proceeds from termination of leased vehicles	0	0
Purchases of property and equipment	(19)	(15)
Other investing activities	(79)	(60)
Net change in due from affiliates	80	(1,208)
Net change in investment in affiliates	694	336
Net cash used in investing activities	(1,893)	(2,415)
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
Debt issuance costs	0	0
Net capital contributions	0	0
Net change in due to affiliates	1,546	2,732
Net cash provided by financing activities	1,546	2,732
Net decrease in cash, cash equivalents and restricted cash	(244)	(220)
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	0	0
Cash, cash equivalents and restricted cash at beginning of period	2,284	2,319
Cash, cash equivalents and restricted cash at end of period	2,040	2,099
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents			2,040	2,284
Restricted cash included in other assets			0
Total	2,284	2,319	2,040	2,284
Non-Guarantors [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	1,586	1,839
Cash flows from investing activities
Purchases of retail finance receivables, net	(3,850)	(4,388)
Principal collections and recoveries on retail finance receivables	3,145	2,912
Proceeds from transfer of retail finance receivables, net	274	1,823
Net funding of commercial finance receivables	(347)	(797)
Purchases of leased vehicles, net	(4,794)	(5,158)
Proceeds from termination of leased vehicles	1,082	481
Purchases of property and equipment	(5)	(5)
Other investing activities		1
Net change in due from affiliates	0	0
Net change in investment in affiliates	0	0
Net cash used in investing activities	(4,495)	(5,131)
Cash flows from financing activities
Net change in debt (original maturities less than three months)	(285)	757
Borrowings and issuance of secured debt	8,440	7,114
Payments on secured debt	(4,805)	(5,251)
Borrowings and issuance of unsecured debt	471	387
Payments on unsecured debt	(574)	(241)
Debt issuance costs	(16)	(13)
Net capital contributions	(694)	(336)
Net change in due to affiliates	604	1,063
Net cash provided by financing activities	3,141	3,480
Net decrease in cash, cash equivalents and restricted cash	232	188
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	37	58
Cash, cash equivalents and restricted cash at beginning of period	3,018	2,683
Cash, cash equivalents and restricted cash at end of period	3,287	2,929
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents			654	917
Total	3,018	2,683	3,287	3,018
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	2,369	4,689
Principal collections and recoveries on retail finance receivables	0	0
Proceeds from transfer of retail finance receivables, net	(2,369)	(4,689)
Net funding of commercial finance receivables	0	0
Purchases of leased vehicles, net	0	0
Proceeds from termination of leased vehicles	0	0
Purchases of property and equipment	0	0
Other investing activities	79	60
Net change in due from affiliates	2,150	3,795
Net change in investment in affiliates	(694)	(336)
Net cash used in investing activities	1,535	3,519
Cash flows from financing activities
Net change in debt (original maturities less than three months)	0	0
Borrowings and issuance of secured debt	(79)	(60)
Payments on secured debt	0	0
Borrowings and issuance of unsecured debt	0	0
Payments on unsecured debt	0	0
Debt issuance costs	0	0
Net capital contributions	694	336
Net change in due to affiliates	(2,150)	(3,795)
Net cash provided by financing activities	(1,535)	(3,519)
Net decrease in cash, cash equivalents and restricted cash	0	0
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	0	0
Cash, cash equivalents and restricted cash at beginning of period	0	0
Cash, cash equivalents and restricted cash at end of period	0	0
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents			0	0
Restricted cash included in other assets			0
Total	$ 0	$ 0	$ 0	$ 0