Finance Receivables Troubled Debt Restructurings (Details) (North America Segment [Member], Consumer Finance Receivables, USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
North America Segment [Member] | Consumer Finance Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 1,123		$ 1,123		$ 767
TDR, allowance for loan losses	(140)		(140)		(103)
TDR, outstanding recorded investment, net of allowances	983		983		664
Impaired Financing Receivable, Unpaid Principal Balance	1,142		1,142		779
Impaired Financing Receivable, Average Recorded Investment	1,057	552	937	417
Loans and Leases Receivable, Impaired, Troubled Debt, Interest Income Earne	124	20	183	45
Troubled Debt Restructurings - Number of Loans Entering a Modification Program	13,543	11,364	35,748	27,302
Troubled Debt Restructurings - Amount of Loans That Entered a Loan Modification Program	$ 232	$ 204	$ 598	$ 478