Selected Quarterly Financial Data (Unaudited) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended										12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2011	Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]
Net Interest Income	$ 207	$ 229	$ 238	$ 394	$ 430		$ 417	$ 391	$ 408		$ 1,068	$ 1,646		$ 1,776
Provision for credit losses	(152)	(160)	267	24	408	[1]	287	738	791	925	(21)	2,224	[2]	4,418	[3]
Net Interest Income Loss After Provision For Credit Losses	359	389	(29)	370	22		130	(347)	(383)		1,089	(578)		(2,642)
Other Revenues	(215)	114	628	354	85		(144)	(1,865)	(195)		881	(2,119)		140
Total operating expenses	253	216	195	268	384		276	239	215		932	1,114		1,255
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	(109)	287	404	456	(277)		(290)	(2,451)	(793)		1,038	(3,811)		(3,757)
Income Tax Expense (Benefit)	51	(91)	(133)	(152)	81		98	939	288		(325)	1,406		1,431
Income (loss) from continuing operations	(58)	196	271	304	(196)		(192)	(1,512)	(505)		713	(2,405)		(2,326)
Income (loss) from discontinued operations before income tax	(19)	(29)	(51)	(78)	(99)		55	1,254	350		(249)	2,521		1,380
Net Income (Loss) Attributable to Parent	(77)	167	220	226	(295)		(137)	(258)	(155)		536	(845)		(1,408)
Increase in credit loss reserve					$ 350					$ 1,308		$ 40

[1] The provision for credit losses during the fourth quarter of 2012 included $350 million related to changes in the loss emergence period used in our roll rate migration analysis. See Note 6, "Credit Loss Reserves," in the accompanying consolidated financial statements for further discussion of the adoption of this new accounting guidance.

[2] Provision for credit losses during 2012 includes $112 million related to the lower of amortized cost or fair value attributable to credit for personal non-credit card receivables transferred to held for sale at June 30, 2012. See Note 7, "Receivables Held for Sale," for additional information.

[3] Provision for credit losses for 2011 includes $925 million related to the adoption of new accounting guidance for TDR Loans in the third quarter of 2011 as discussed more fully in Note 5, "Receivables."