Guarantor Consolidating Financial Statements Guarantor Cash Flow (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	$ 465,000,000	$ 315,000,000
Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract]
Purchases of consumer finance receivables, net	(3,304,000,000)	(1,343,000,000)
Principal Collection and Recoveries on Receivables	(2,617,000,000)	(1,096,000,000)
Proceeds from sale of consumer finance receivables, net	0	0
Payments To Acquire Commercial Lending Receivable		273,000,000
Principal Collections and Recoveries on Commercial Lending Receivables	(350,000,000)
Purchases of leased vehicles, net	(628,000,000)	(510,000,000)
Proceeds from termination of leased vehicles	123,000,000	37,000,000
Purchases of property and equipment	(7,000,000)	(1,000,000)
Change in restricted cash	(147,000,000)	(88,000,000)
Change in other assets	0	5,000,000
Investments in and Advances to Affiliates, at Fair Value, Period Increase (Decrease)	0
Net change in investment in affiliates		0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	(1,696,000,000)	(1,077,000,000)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
Net increase in debt (original maturities less than three months)	451,000,000
Borrowings and issuance of secured debt	5,070,000,000	3,384,000,000
Payments on secured debt	(4,238,000,000)	(1,000,000,000)
Proceeds from Issuance of Unsecured Debt	390,000,000	0
Repayments of Unsecured Debt	(330,000,000)	0
Proceeds from Contributed Capital	0
Payments of Debt Issuance Costs	(23,000,000)	(13,000,000)
Proceeds from Contributions from Parent		0
Increase (Decrease) Due from Affiliates		0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	1,320,000,000	2,371,000,000
Cash and Cash Equivalents, Period Increase (Decrease)	89,000,000	1,609,000,000
Effect of Exchange Rate on Cash and Cash Equivalents	(1,000,000)	(1,000,000)
Cash and cash equivalents	1,162,000,000	2,897,000,000
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	175,000,000	28,000,000
Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract]
Purchases of consumer finance receivables, net	0	0
Principal Collection and Recoveries on Receivables	0	0
Proceeds from sale of consumer finance receivables, net		0
Payments To Acquire Commercial Lending Receivable		0
Principal Collections and Recoveries on Commercial Lending Receivables	0
Purchases of leased vehicles, net		0
Purchases of property and equipment	0	0
Change in restricted cash	0	0
Change in other assets		0
Investments in and Advances to Affiliates, at Fair Value, Period Increase (Decrease)	0
Net change in investment in affiliates		6,000,000
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	0	(6,000,000)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
Borrowings and issuance of secured debt	0	0
Payments on secured debt	0	0
Proceeds from Issuance of Unsecured Debt	0
Repayments of Unsecured Debt	0
Proceeds from Contributed Capital	(45,000,000)
Payments of Debt Issuance Costs	0	0
Proceeds from Contributions from Parent		0
Increase (Decrease) Due from Affiliates	130,000,000	(21,000,000)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	(175,000,000)	(21,000,000)
Cash and Cash Equivalents, Period Increase (Decrease)	0	0
Effect of Exchange Rate on Cash and Cash Equivalents	0	0
Cash and cash equivalents	0	0
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	57,000,000	113,000,000
Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract]
Purchases of consumer finance receivables, net	(1,363,000,000)	(1,343,000,000)
Principal Collection and Recoveries on Receivables	33,000,000	0
Proceeds from sale of consumer finance receivables, net	(881,000,000)	2,114,000,000
Payments To Acquire Commercial Lending Receivable		361,000,000
Principal Collections and Recoveries on Commercial Lending Receivables	(152,000,000)
Purchases of leased vehicles, net		0
Purchases of property and equipment	0	0
Change in restricted cash	(3,000,000)	0
Change in other assets		0
Investments in and Advances to Affiliates, at Fair Value, Period Increase (Decrease)	(640,000,000)
Net change in investment in affiliates		1,095,000,000
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	(24,000,000)	47,000,000
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
Borrowings and issuance of secured debt	0	0
Payments on secured debt	0	0
Proceeds from Issuance of Unsecured Debt	0
Repayments of Unsecured Debt	0
Proceeds from Contributed Capital	0
Payments of Debt Issuance Costs	0	0
Proceeds from Contributions from Parent		0
Increase (Decrease) Due from Affiliates	(112,000,000)	1,422,000,000
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	112,000,000	1,422,000,000
Cash and Cash Equivalents, Period Increase (Decrease)	145,000,000	1,582,000,000
Effect of Exchange Rate on Cash and Cash Equivalents	0	0
Cash and cash equivalents	540,000,000	2,834,000,000
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	233,000,000	174,000,000
Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract]
Purchases of consumer finance receivables, net	(2,822,000,000)	(2,114,000,000)
Principal Collection and Recoveries on Receivables	(2,650,000,000)	(1,096,000,000)
Proceeds from sale of consumer finance receivables, net	0	0
Payments To Acquire Commercial Lending Receivable		(644,000,000)
Principal Collections and Recoveries on Commercial Lending Receivables	(198,000,000)
Purchases of leased vehicles, net	(628,000,000)	(510,000,000)
Proceeds from termination of leased vehicles	123,000,000	37,000,000
Purchases of property and equipment	(7,000,000)	(1,000,000)
Change in restricted cash	(150,000,000)	(88,000,000)
Change in other assets		5,000,000
Investments in and Advances to Affiliates, at Fair Value, Period Increase (Decrease)	0
Net change in investment in affiliates		0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	(1,032,000,000)	(2,219,000,000)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
Net increase in debt (original maturities less than three months)	451,000,000
Borrowings and issuance of secured debt	5,070,000,000	3,384,000,000
Payments on secured debt	(4,238,000,000)	(1,000,000,000)
Proceeds from Issuance of Unsecured Debt	390,000,000
Repayments of Unsecured Debt	(330,000,000)
Proceeds from Contributed Capital	(595,000,000)
Payments of Debt Issuance Costs	(23,000,000)	(13,000,000)
Proceeds from Contributions from Parent		1,101,000,000
Increase (Decrease) Due from Affiliates	(18,000,000)	(1,401,000,000)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	743,000,000	2,071,000,000
Cash and Cash Equivalents, Period Increase (Decrease)	(56,000,000)	26,000,000
Effect of Exchange Rate on Cash and Cash Equivalents	(1,000,000)	(1,000,000)
Cash and cash equivalents	622,000,000	62,000,000
Consolidation, Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract]
Purchases of consumer finance receivables, net	881,000,000	(2,114,000,000)
Principal Collection and Recoveries on Receivables	0	0
Proceeds from sale of consumer finance receivables, net	881,000,000	(2,114,000,000)
Payments To Acquire Commercial Lending Receivable		732,000,000
Principal Collections and Recoveries on Commercial Lending Receivables	0
Purchases of leased vehicles, net		0
Purchases of property and equipment	0	0
Change in restricted cash	0	0
Change in other assets		0
Investments in and Advances to Affiliates, at Fair Value, Period Increase (Decrease)	640,000,000
Net change in investment in affiliates		1,101,000,000
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	(640,000,000)	1,101,000,000
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
Borrowings and issuance of secured debt	0	0
Payments on secured debt	0	0
Proceeds from Issuance of Unsecured Debt	0
Repayments of Unsecured Debt	0
Proceeds from Contributed Capital	640,000,000
Payments of Debt Issuance Costs	0	0
Proceeds from Contributions from Parent		(1,101,000,000)
Increase (Decrease) Due from Affiliates		0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	640,000,000	(1,101,000,000)
Cash and Cash Equivalents, Period Increase (Decrease)	0	0
Effect of Exchange Rate on Cash and Cash Equivalents	0	0
Cash and cash equivalents	$ 0