Finance Receivables Allowance for Loan Losses (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision for Loan, Lease, and Other Losses	$ 160	$ 117	$ 408	$ 311
Post-Acquisition Portfolio | Consumer Finance Receivables
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	575	423	497	345
Provision for Loan, Lease, and Other Losses	162	116	421	293
Financing Receivable, Allowance for Credit Losses, Write-downs	(230)	(171)	(645)	(419)
Financing Receivable, Allowance for Credit Losses, Recovery	106	99	340	248
Financing Receivable Allowance for Credit Losses Foreign Currency Translation	(5)		(5)
Financing Receivable, Allowance for Credit Losses	608	467	608	467
Post-Acquisition Portfolio | North America Segment [Member] | Consumer Finance Receivables
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	515	415	468	345
Provision for Loan, Lease, and Other Losses	119	107	312	276
Financing Receivable, Allowance for Credit Losses, Write-downs	(194)	(153)	(543)	(401)
Financing Receivable, Allowance for Credit Losses, Recovery	96	84	299	233
Financing Receivable, Allowance for Credit Losses	536	453	536	453
Post-Acquisition Portfolio | International Segment [Member] | Consumer Finance Receivables
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	60	8	29	0
Provision for Loan, Lease, and Other Losses	43	9	109	17
Financing Receivable, Allowance for Credit Losses, Write-downs	(36)	(18)	(102)	(18)
Financing Receivable, Allowance for Credit Losses, Recovery	10	15	41	15
Financing Receivable Allowance for Credit Losses Foreign Currency Translation	(5)		(5)
Financing Receivable, Allowance for Credit Losses	$ 72	$ 14	$ 72	$ 14