Discontinued Operations - Additional Information (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets of discontinued operations	$ 16,000,000	$ 13,000,000
Liabilities of discontinued operations	113,000,000	102,000,000
Commercial Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets of discontinued operations	4,000,000	5,000,000
Liabilities of discontinued operations	0	0
Card and Retail Services [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets of discontinued operations	12,000,000	8,000,000
Liabilities of discontinued operations	$ 113,000,000	$ 102,000,000