Finance Receivables Allowance for Loan Losses (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
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision for Loan, Lease, and Other Losses	$ 113	$ 100	$ 248	$ 194
Post-Acquisition Portfolio | Consumer Finance Receivables
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	537	382	497	345
Provision for Loan, Lease, and Other Losses	122	88	259	177
Financing Receivable, Allowance for Credit Losses, Write-downs	(191)	(116)	(415)	(248)
Financing Receivable, Allowance for Credit Losses, Recovery	107	69	234	149
Financing Receivable, Allowance for Credit Losses	575	423	575	423
Post-Acquisition Portfolio | North America Segment [Member] | Consumer Finance Receivables
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	491	382	468	345
Provision for Loan, Lease, and Other Losses	89	80	193	169
Financing Receivable, Allowance for Credit Losses, Write-downs	(157)	(116)	(349)	(248)
Financing Receivable, Allowance for Credit Losses, Recovery	92	69	203	149
Financing Receivable, Allowance for Credit Losses	515	415	515	415
Post-Acquisition Portfolio | International Segment [Member] | Consumer Finance Receivables
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	46	0	29	0
Provision for Loan, Lease, and Other Losses	33	8	66	8
Financing Receivable, Allowance for Credit Losses, Write-downs	(34)	0	(66)	0
Financing Receivable, Allowance for Credit Losses, Recovery	15	0	31	0
Financing Receivable, Allowance for Credit Losses	$ 60	$ 8	$ 60	$ 8