Consolidated Statement of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Financing Revenue and Other Interest Income [Abstract]
Interest and fees on finance receivables and loans	$ 1,124	$ 1,139	$ 2,231	$ 2,274
Interest on loans held-for-sale	1	3	1	19
Interest and dividends on available-for-sale investment securities	93	76	188	144
Interest-bearing cash	1	2	4	5
Operating leases	884	788	1,754	1,522
Total financing revenue and other interest income	2,103	2,008	4,178	3,964
Interest Expense [Abstract]
Interest on deposits	166	162	329	326
Interest on short-term borrowings	13	16	28	32
Interest on long-term debt	549	703	1,083	1,404
Total interest expense	728	881	1,440	1,762
Depreciation expense on operating lease assets	509	499	1,051	934
Net financing revenue (loss)	866	628	1,687	1,268
Other revenue [Abstract]
Servicing fees	7	19	16	101
Servicing asset valuation and hedge activities, net	0	(12)	0	(213)
Total servicing income, net	7	7	16	(112)
Insurance premiums and service revenue earned	249	258	490	517
Gain (loss) on mortgage and automotive loans, net	6	(1)	6	37
Gains (Losses) on Extinguishment of Debt	(7)	0	(46)	0
Other gain (loss) on investments, net	41	64	84	115
Other income, net of losses	69	74	136	231
Total other revenue	365	402	686	788
Total net revenue (loss)	1,231	1,030	2,373	2,056
Provision for loan losses	63	89	200	220
Noninterest Expense [Abstract]
Compensation and benefits expense	215	252	469	537
Insurance losses and loss adjustment expenses	188	146	256	261
Other operating expenses	418	403	809	961
Total noninterest expense	821	801	1,534	1,759
Income (loss) from continuing operations before income tax expense	347	140	639	77
Income tax expense (benefit) from continuing operations	64	40	158	(83)
Net income (loss) from continuing operations	283	100	481	160
Income (loss) from discontinued operations, net of tax	40	(1,027)	69	6
Net income (loss)	323	(927)	550	166
Other comprehensive income (loss), net of tax	89	(181)	181	(498)
Comprehensive income (loss)	$ 412	$ (1,108)	$ 731	$ (332)
Earnings Per Share, Basic [Abstract]
Net income (loss) from continuing operations, Per Basic Share	$ 0.45	$ (0.24)	$ 0.73	$ (0.58)
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	$ 0.09	$ (2.49)	$ 0.14	$ 0.01
Net (loss) income, Basic	$ 0.54	$ (2.73)	$ 0.87	$ (0.57)
Earnings Per Share, Diluted [Abstract]
Net income (loss) from continuing operations, Per Diluted Share	$ 0.45	$ (0.24)	$ 0.73	$ (0.58)
Income (loss) from discontinued operations, net of tax	$ 0.09	$ (2.49)	$ 0.14	$ 0.01
Net (loss) income, Diluted	$ 0.54	$ (2.73)	$ 0.87	$ (0.57)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	1.6		1.6