Finance Receivables Credit Quality (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013 Rate		Dec. 31, 2012 Rate
Financing Receivable, Recorded Investment [Line Items]
Finance Receivables Credit Indicator, Percentage	100.00%	[1]	100.00%	[1]
Financing Receivable, Gross	$ 11,467	[1]	$ 10,993	[1]
FICO Scores Less Than 540 [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance Receivables, Carrying Value	3,444		3,011
Finance Receivables Credit Indicator, Percentage	30.00%		27.40%
FICO score 540 to 599 [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance Receivables, Carrying Value	5,389		5,014
Finance Receivables Credit Indicator, Percentage	47.00%		45.60%
FICO score 600 to 659 [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance Receivables, Carrying Value	2,333		2,513
Finance Receivables Credit Indicator, Percentage	20.40%		22.90%
FICO score 660 and greater [Member]
Financing Receivable, Recorded Investment [Line Items]
Finance Receivables, Carrying Value	301		455
Finance Receivables Credit Indicator, Percentage	2.60%		4.10%
Commercial Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Gross	$ 5,246		$ 560

[1] (a)Balance at the end of the period is the sum of pre-acquisition consumer finance receivables-outstanding balance and post-acquisition consumer finance receivables, net of fees for North America Segment.