Discontinued Operations - Additional Information (Details) - USD ($)	Mar. 29, 2013	Dec. 31, 2015	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets of discontinued operations		$ 13,000,000	$ 63,000,000
Liabilities of discontinued operations		102,000,000	71,000,000
Insurance Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of businesses	$ 153,000,000
Gain from divestiture, before tax	21,000,000
Gain from divestiture, after tax	$ 13,000,000
Commercial Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets of discontinued operations		5,000,000	62,000,000
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		8,000,000	1,000,000
Liabilities of discontinued operations		$ 102,000,000	$ 71,000,000