Guarantor Consolidating Financial Statements Guarantor Cash Flow (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Net Income (Loss) Attributable to Parent	$ 284	$ 249
Provision for Loan and Lease Losses	194	110
Net Cash Provided by (Used in) Operating Activities	701	582
Payments to Acquire Receivables	3,812	2,870
Principal Collection and Recoveries on Receivables	3,054	2,040
Payments To Acquire Commercial Lending Receivable	(8,405)	(173)
Principal Collections and Recoveries on Commercial Lending Receivables	8,023	46
Purchases of Leased Vehicles	1,176	621
Proceeds from Termination of Leased Vehicles	84	18
Payments to Acquire Businesses, Net of Cash Acquired	(2,107)
Payments to Acquire Property, Plant, and Equipment	4	6
Increase (Decrease) in Restricted Cash and Investments	158	(235)
Payments for (Proceeds from) Other Investing Activities	2	(18)
Investment in Affiliates - Net Change
Net Cash Provided by (Used in) Investing Activities	(4,503)	(1,313)
Proceeds from Lines of Credit	9,085	5,063
Repayments of Lines of Credit	7,007	3,929
Proceeds from Issuance of Unsecured Debt	3,022
Repayments of Unsecured Debt	(633)
Repayment of acquisition related debt	(1,416)
Proceeds from Contributed Capital	1,300
Payments of Debt Issuance Costs	63	23
Proceeds from Contributions from Parent
Increase (Decrease) Due from Affiliates
Net Cash Provided by (Used in) Financing Activities	4,288	1,111
Cash and Cash Equivalents, Period Increase (Decrease)	486	380
Effect of Exchange Rate on Cash and Cash Equivalents	(18)
Cash and Cash Equivalents, at Carrying Value	1,757	952
Guarantor Subsidiaries [Member]
Net Income (Loss) Attributable to Parent	255	258
Provision for Loan and Lease Losses	127	128
Net Cash Provided by (Used in) Operating Activities	184	98
Payments to Acquire Receivables	2,695	2,870
Principal Collection and Recoveries on Receivables	1
Proceeds from sale of consumer finance receivables, net	3,105
Payments To Acquire Commercial Lending Receivable	(2,065)	(173)
Principal Collections and Recoveries on Commercial Lending Receivables	985	46
Proceeds from sale of commercial finance receivables, net	1,467
Payments to Acquire Businesses, Net of Cash Acquired	(863)
Payments to Acquire Property, Plant, and Equipment		1
Payments for (Proceeds from) Other Investing Activities	10	(29)
Investment in Affiliates - Net Change	97	(2,210)
Net Cash Provided by (Used in) Investing Activities	(172)	1,989
Increase (Decrease) Due from Affiliates	211	1,694
Net Cash Provided by (Used in) Financing Activities	(211)	(1,694)
Cash and Cash Equivalents, Period Increase (Decrease)	(199)	393
Effect of Exchange Rate on Cash and Cash Equivalents
Cash and Cash Equivalents, at Carrying Value	1,053	893
Non-Guarantor Subsidiaries [Member]
Net Income (Loss) Attributable to Parent	349	320
Provision for Loan and Lease Losses	67	(18)
Net Cash Provided by (Used in) Operating Activities	431	390
Payments to Acquire Receivables	4,222	2,748
Principal Collection and Recoveries on Receivables	3,053	2,040
Payments To Acquire Commercial Lending Receivable	7,807
Principal Collections and Recoveries on Commercial Lending Receivables	7,038
Purchases of Leased Vehicles	1,176	621
Proceeds from Termination of Leased Vehicles	84	18
Payments to Acquire Businesses, Net of Cash Acquired	440
Payments to Acquire Property, Plant, and Equipment	4	5
Increase (Decrease) in Restricted Cash and Investments	158	(235)
Payments for (Proceeds from) Other Investing Activities	(8)	4
Net Cash Provided by (Used in) Investing Activities	(2,744)	(1,085)
Proceeds from Lines of Credit	7,985	5,063
Repayments of Lines of Credit	5,907	3,929
Proceeds from Issuance of Unsecured Debt	522
Payments of Debt Issuance Costs	34	23
Proceeds from Contributions from Parent	130	(2,210)
Increase (Decrease) Due from Affiliates	(2,354)	(1,781)
Net Cash Provided by (Used in) Financing Activities	3,001	682
Cash and Cash Equivalents, Period Increase (Decrease)	688	(13)
Effect of Exchange Rate on Cash and Cash Equivalents	(21)
Cash and Cash Equivalents, at Carrying Value	704	59
Consolidation, Eliminations [Member]
Net Income (Loss) Attributable to Parent	(604)	(578)
Net Cash Provided by (Used in) Operating Activities
Payments to Acquire Receivables	(3,105)	(2,748)
Proceeds from sale of consumer finance receivables, net	(3,105)
Payments To Acquire Commercial Lending Receivable	(1,467)
Proceeds from sale of commercial finance receivables, net	(1,467)
Payments to Acquire Businesses, Net of Cash Acquired	863
Investment in Affiliates - Net Change	(126)	2,210
Net Cash Provided by (Used in) Investing Activities	989	(2,210)
Proceeds from Contributions from Parent	(130)	2,210
Increase (Decrease) Due from Affiliates	862
Net Cash Provided by (Used in) Financing Activities	(992)	2,210
Cash and Cash Equivalents, Period Increase (Decrease)	(3)
Effect of Exchange Rate on Cash and Cash Equivalents	3
Parent Company [Member]
Net Income (Loss) Attributable to Parent	284	249
Net Cash Provided by (Used in) Operating Activities	86	94
Payments to Acquire Businesses, Net of Cash Acquired	(2,547)
Payments to Acquire Property, Plant, and Equipment
Payments for (Proceeds from) Other Investing Activities		(7)
Investment in Affiliates - Net Change	(29)
Net Cash Provided by (Used in) Investing Activities	(2,576)	(7)
Proceeds from Lines of Credit	1,100
Repayments of Lines of Credit	(1,100)
Proceeds from Issuance of Unsecured Debt	2,500
Repayments of Unsecured Debt	(633)
Repayment of acquisition related debt	(1,416)
Proceeds from Contributed Capital	1,300
Payments of Debt Issuance Costs	29
Increase (Decrease) Due from Affiliates	1,281	87
Net Cash Provided by (Used in) Financing Activities	2,490	(87)
Cash and Cash Equivalents, Period Increase (Decrease)
Effect of Exchange Rate on Cash and Cash Equivalents