Segments Operations Reporting by Revenue (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]
Revenues	$ 1,191	$ 836	$ 2,288	$ 1,376
Operating Expenses	459	292	884	480
Provision for Loan, Lease, and Other Losses	113	100	248	194
Interest expense	354	164	669	246
Acquisition and integration expenses	0	16	0	22
Income before income taxes	265	264	487	434
Operating Segments [Member] | North America Segment [Member]
Segment Reporting Information [Line Items]
Revenues	691	588	1,327	1,128
Operating Expenses	310	203	584	391
Provision for Loan, Lease, and Other Losses	90	81	193	175
Interest expense	104	91	196	173
Income before income taxes	187	213	354	389
Operating Segments [Member] | International Segment [Member]
Segment Reporting Information [Line Items]
Revenues	500	248	961	248
Operating Expenses	149	89	300	89
Provision for Loan, Lease, and Other Losses	23	19	55	19
Interest expense	248	81	462	81
Acquisition and integration expenses		16		22
Income before income taxes	80	43	144	37
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Revenues	15	14	31	14
Operating Expenses	0	0	0	0
Provision for Loan, Lease, and Other Losses	0	0	0	0
Interest expense	17	6	42	6
Income before income taxes	(2)	8	(11)	8
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(15)	(14)	(31)	(14)
Interest expense	(15)	(14)	(31)	(14)
Income before income taxes	$ 0	$ 0	$ 0	$ 0