Finance Receivables Activity in Allowance for Commercial Loan Losses (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for Loan, Lease, and Other Losses	$ 117	$ 311
Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Losses	29	29	24	6
Provision for Loan, Lease, and Other Losses	1	18
Financing Receivable, Allowance for Credit Losses, Recovery	4	5
North America [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for Loan, Lease, and Other Losses	108	283
North America [Member] | Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Losses	13	13	12	6
Provision for Loan, Lease, and Other Losses	1	7
International [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for Loan, Lease, and Other Losses	9	28
International [Member] | Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Losses	16	16	12
Provision for Loan, Lease, and Other Losses		11
Financing Receivable, Allowance for Credit Losses, Recovery	$ 4	$ 5