Consolidated Statement of Income (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Financing Revenue and Other Interest Income [Abstract]
Interest and fees on finance receivables and loans	$ 1,107		$ 1,135
Interest on loans held-for-sale	0		16
Interest and dividends on available-for-sale investment securities	95		68
Interest-bearing cash	3		3
Operating leases	870		734
Total financing revenue and other interest income	2,075		1,956
Interest Expense [Abstract]
Interest on deposits	163		164
Interest on short-term borrowings	15		16
Interest on long-term debt	534		701
Total interest expense	712		881
Depreciation expense on operating lease assets	542		435
Net financing revenue (loss)	821		640
Other revenue [Abstract]
Servicing fees	9		82
Servicing asset valuation and hedge activities, net	0		(201)
Total servicing income, net	9		(119)
Insurance premiums and service revenue earned	241		259
Gain (loss) on mortgage and automotive loans, net	0		38
Gains (Losses) on Extinguishment of Debt	(39)		0
Other gain (loss) on investments, net	43		51
Other income, net of losses	67		157
Total other revenue	321		386
Total net revenue (loss)	1,142		1,026
Provision for loan losses	137		131
Noninterest Expense [Abstract]
Compensation and benefits expense	254		285
Insurance losses and loss adjustment expenses	68		115
Other operating expenses	391		558
Total noninterest expense	713		958
Income (loss) from continuing operations before income tax expense	292		(63)
Income tax expense (benefit) from continuing operations	94		(123)
Net income (loss) from continuing operations	198		60
Income (loss) from discontinued operations, net of tax	29		1,033
Net income (loss)	227		1,093
Other comprehensive income (loss), net of tax	92		(317)
Comprehensive income (loss)	319		776
Net income (loss) attributable to common shareholders [Abstract]
Net income (loss) from continuing operations	198		60
Preferred stock dividends - U.S. Department of Treasury	0		(133)
Preferred stock dividends	(68)		(67)
Net income (loss) from continuing operations attributable to common shareholders	130		(140)
Income (loss) from discontinued operations, net of tax	29		1,033
Net income (loss) attributable to common shareholders	$ 159		$ 893
Basic weighted-average common shares outstanding	479,767,540		412,600,700
Diluted weighted-average common shares outstanding	479,767,540	[1]	412,600,700	[1]
Earnings Per Share, Basic [Abstract]
Net income (loss) from continuing operations, Per Basic Share	$ 0.27		$ (0.34)
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	$ 0.06		$ 2.50
Net (loss) income, Basic	$ 0.33		$ 2.16
Earnings Per Share, Diluted [Abstract]
Net income (loss) from continuing operations, Per Diluted Share	$ 0.27	[1]	$ (0.34)	[1]
Income (loss) from discontinued operations, net of tax	$ 0.06	[1]	$ 2.50	[1]
Net (loss) income, Diluted	$ 0.33	[1]	$ 2.16	[1]

[1] Due to the antidilutive effect of converting the Fixed Rate Cumulative Mandatorily Convertible Preferred Stock into common shares for the three months ended March 31, 2013 and the net loss from continuing operations attributable to common shareholders for the three months ended March 31, 2013, net income (loss) from continuing operations attributable to common shareholders and basic weighted-average common shares outstanding were used to calculate basic and diluted earnings per share.