Finance Receivables - Credit Quality,Impaired Receivables, TDRs and Non-Accrual Status (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	$ 84,380	$ 81,993	$ 76,999
Number of Days Past Due After Which Consumer Receivables are Considered Impaired	greater than 120 days past due
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	33,841	31,796
Impaired Financing Receivable, Recorded Investment	92	71
Impaired Financing Receivable Recorded Investment, Percentage of Receivable	0.30%	0.20%
Financing Receivable, Recorded Investment, Nonaccrual Status	54	41
Financing Receivable, Recorded Investment, Nonaccrual Status, Percentage of Receivable	0.20%	0.10%
FinanceReceivable,Modifications,Numberof Contracts	0
Commercial Portfolio Segment [Member] | Dealer Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	32,465	30,371
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	50,539	50,197
Impaired Financing Receivable, Recorded Investment	424	435
Impaired Financing Receivable Recorded Investment, Percentage of Receivable	0.80%	0.90%
Financing Receivable, Recorded Investment, Nonaccrual Status	220	238
Financing Receivable, Recorded Investment, Nonaccrual Status, Percentage of Receivable	0.40%	0.50%
Financing Receivable, Modifications, Recorded Investment	50		55
Financing Receivable, Modifications, Recorded Investment, Percentage of Receivable	0.10%		0.10%
Financing Receivables, Modifications, Contracts Subsequently Defaulted, Default Rate	6.40%		6.30%
Financing Receivable, Allowance for Credit Losses Related to Troubled Debt Restructurings	23		22
North America Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	63,580	62,836
North America Segment [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	24,145	23,189
North America Segment [Member] | Commercial Portfolio Segment [Member] | Dealer Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	23,173	22,139
North America Segment [Member] | Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	39,435	39,647
International Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	20,800	19,157
International Segment [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	9,696	8,607
International Segment [Member] | Commercial Portfolio Segment [Member] | Dealer Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	9,292	8,232
International Segment [Member] | Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	11,104	10,550
Minimum [Member] | Consumer Portfolio Segment [Member] | Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Days At Which Finance Receivables Are Put in Non Accrual Status	120 days
Minimum [Member] | Consumer Portfolio Segment [Member] | Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Days At Which Finance Receivables Are In Process Of Collection	90 days
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term, in days, for credit quality rating	current to 60 days past due
Special Mention [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance Receivables Credit Quality Ratings Term Range	61 days
Special Mention [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance Receivables Credit Quality Ratings Term Range	120 days
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term, in days, for credit quality rating	greater than 120 days past due
Group I | Commercial Portfolio Segment [Member] | Dealer Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	25,906	23,874
Group I | North America Segment [Member] | Commercial Portfolio Segment [Member] | Dealer Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	19,527	18,424
Group I | International Segment [Member] | Commercial Portfolio Segment [Member] | Dealer Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	6,379	5,450
Group II | Commercial Portfolio Segment [Member] | Dealer Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	5,564	5,381
Group II | North America Segment [Member] | Commercial Portfolio Segment [Member] | Dealer Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	3,306	3,289
Group II | International Segment [Member] | Commercial Portfolio Segment [Member] | Dealer Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	2,258	2,092
Group III | Commercial Portfolio Segment [Member] | Dealer Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	932	1,073
Group III | North America Segment [Member] | Commercial Portfolio Segment [Member] | Dealer Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	330	424
Group III | International Segment [Member] | Commercial Portfolio Segment [Member] | Dealer Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	602	649
Group IV | Commercial Portfolio Segment [Member] | Dealer Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	63	43
Group IV | North America Segment [Member] | Commercial Portfolio Segment [Member] | Dealer Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	10	2
Group IV | International Segment [Member] | Commercial Portfolio Segment [Member] | Dealer Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	$ 53	$ 41