Discontinued Operations - Summary of Assets and Liabilities of Disposal Group Held for Sale (Details) (USD $)	Mar. 31, 2014		Dec. 31, 2013		Mar. 31, 2013	Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash	$ 21,000,000		$ 23,000,000		$ 43,000,000	$ 200,000,000
Assets of discontinued operations	173,000,000		165,000,000
Liabilities of discontinued operations	98,000,000		103,000,000
Commercial Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets of discontinued operations	64,000,000		63,000,000
Liabilities of discontinued operations	0		1,000,000
Card and Retail Services [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash	21,000,000		23,000,000
Other assets	88,000,000	[1]	79,000,000	[1]
Assets of discontinued operations	109,000,000		102,000,000
Other liabilities	98,000,000	[2]	102,000,000	[2]
Liabilities of discontinued operations	$ 98,000,000		$ 102,000,000

[1] At March 31, 2014 and December 31, 2013, other assets primarily consists of current and deferred taxes.

[2] At March 31, 2014 and December 31, 2013, other liabilities primarily consists of certain legal accruals.