Finance Receivables - Aging Analysis (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number Of Days After Which Finance Receivable Is Considered Past Due	any payment, including principal and interest, that is at least 31 days past the contractual due date
Finance Receivables Aging Analysis [Abstract]
Financing Receivables	$ 81,993	$ 75,448
International Segment [Member]
Finance Receivables Aging Analysis [Abstract]
Financing Receivables	19,157	16,642
North America Segment [Member]
Finance Receivables Aging Analysis [Abstract]
Financing Receivables	62,836	58,806
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	14	13
Finance Receivables Aging Analysis [Abstract]
31-60 days past due	754	829
61-90 days past due	105	114
91-120 days past due	27	30
Greater than 120 days past due	63	81
Total past due	949	1,054
Current	49,248	45,928
Financing Receivables	50,197	46,982
Consumer Portfolio Segment [Member] | International Segment [Member]
Finance Receivables Aging Analysis [Abstract]
31-60 days past due	39	46
61-90 days past due	17	17
91-120 days past due	9	9
Greater than 120 days past due	26	29
Total past due	91	101
Current	10,459	8,641
Financing Receivables	10,550	8,742
Consumer Portfolio Segment [Member] | North America Segment [Member]
Finance Receivables Aging Analysis [Abstract]
31-60 days past due	715	783
61-90 days past due	88	97
91-120 days past due	18	21
Greater than 120 days past due	37	52
Total past due	858	953
Current	38,789	37,287
Financing Receivables	39,647	38,240
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	21	5
Finance Receivables Aging Analysis [Abstract]
Total past due	89	40
Current	31,707	28,426
Financing Receivables	31,796	28,466
Commercial Portfolio Segment [Member] | International Segment [Member]
Finance Receivables Aging Analysis [Abstract]
Total past due	40	11
Current	8,567	7,889
Financing Receivables	8,607	7,900
Commercial Portfolio Segment [Member] | North America Segment [Member]
Finance Receivables Aging Analysis [Abstract]
Total past due	49	29
Current	23,140	20,537
Financing Receivables	$ 23,189	$ 20,566