Business Segments - Reconciliation of IFRS Basis Segment Results (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting [Line Items]
Net Interest Income	$ (643)	$ (500)	$ (522)
Other Revenues	966	(1,609)	3
Provision For Credit Losses	(732)	(332)	(495)
Total Costs and Expenses	67	44	(40)
Profit (Loss) Before Tax	988	(1,821)	16
Receivables	(2,644)	(4,557)	(162)
Total Assets	(1,796)	(3,074)	(2,974)
Derivatives and hedge accounting
Segment Reporting [Line Items]
Net Interest Income	5	15	5
Other Revenues	0	0	0
Provision For Credit Losses	0	0	0
Total Costs and Expenses	0	0	0
Profit (Loss) Before Tax	5	15	5
Receivables	0	0	0
Total Assets	(6)	(4)	0
Goodwill and intangible assets
Segment Reporting [Line Items]
Net Interest Income			0
Other Revenues			0
Provision For Credit Losses			0
Total Costs and Expenses			0
Profit (Loss) Before Tax			0
Receivables			0
Total Assets			(111)
Purchase accounting
Segment Reporting [Line Items]
Net Interest Income	0	(5)	(4)
Other Revenues	16	3	32
Provision For Credit Losses	43	14	14
Total Costs and Expenses	0	0	0
Profit (Loss) Before Tax	(27)	(16)	14
Receivables	35	19	21
Total Assets	29	46	57
Deferred loan origination costs and premiums
Segment Reporting [Line Items]
Net Interest Income	(15)	(15)	(30)
Other Revenues	4	(5)	0
Provision For Credit Losses	0	0	0
Total Costs and Expenses	0	0	0
Profit (Loss) Before Tax	(11)	(20)	(30)
Receivables	97	125	143
Total Assets	63	70	83
Credit loss impairment provisioning
Segment Reporting [Line Items]
Net Interest Income	(649)	(535)	(499)
Other Revenues	250	(14)	0
Provision For Credit Losses	(110)	15	(506)
Total Costs and Expenses	0	0	0
Profit (Loss) Before Tax	(289)	(564)	7
Receivables	(911)	(222)	(300)
Total Assets	(719)	(533)	(170)
Loans held for sale
Segment Reporting [Line Items]
Net Interest Income	4	4	6
Other Revenues	671	(1,523)	0
Provision For Credit Losses	(665)	(361)	0
Total Costs and Expenses	(5)	5	0
Profit (Loss) Before Tax	1,345	(1,163)	6
Receivables	(1,871)	(4,487)	(36)
Total Assets	94	(768)	(23)
Interest recognition
Segment Reporting [Line Items]
Net Interest Income	9	34	(2)
Other Revenues	8	0	0
Provision For Credit Losses	0	0	0
Total Costs and Expenses	0	0	0
Profit (Loss) Before Tax	17	34	(2)
Receivables	7	8	10
Total Assets	27	16	(6)
Other [Member]
Segment Reporting [Line Items]
Net Interest Income	3	2	2
Other Revenues	17	(70)	(29)
Provision For Credit Losses	0	0	(3)
Total Costs and Expenses	72	39	(40)
Profit (Loss) Before Tax	(52)	(107)	16
Receivables	(1)	0	0
Total Assets	$ (1,284)	$ (1,901)	$ (2,804)