General Information (Details) - USD ($)			3 Months Ended		6 Months Ended
	May 25, 2016	Feb. 25, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Feb. 04, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Receivables sold and derecognized			$ 623,000,000	$ 488,000,000	$ 623,000,000	$ 488,000,000
Amount collected on behalf of financial institution			560,000,000	342,000,000	560,000,000	342,000,000
Amount funded by financial institution			84,000,000	121,000,000	84,000,000	121,000,000
Amount of deferred proceeds			31,000,000	$ 57,000,000	31,000,000	57,000,000
Receivables sold					19,000,000	$ 98,000,000
Amount transferred subject to continuing involvement			$ 345,000,000		$ 345,000,000		$ 282,000,000
Dividends declared (in dollars per share)	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.10	$ 0.10
Share repurchase program, authorized amount								$ 250,000,000
Shares repurchased (in shares)					6,555,073	565,026
Shares repurchased, average price (in dollars per share)					$ 12.51	$ 14.16
Stock repurchase program, remaining authorized repurchase amount			$ 105,000,000		$ 105,000,000
Business Combinations [Abstract]
Charges Associated with Business Combinations			5,300,000	$ 3,400,000	10,400,000	$ 4,400,000
Other Special Charges			0	500,000	5,400,000	1,700,000
Business Combinations and Other Special Charges			$ 5,300,000	$ 3,900,000	$ 15,800,000	$ 6,100,000