Finance Receivables - Credit Quality (Details) (Financial Services [Member], USD $) In Millions, unless otherwise specified																										3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Mar. 31, 2014 Non-consumer [Member]	Dec. 31, 2013 Non-consumer [Member]	Mar. 31, 2014 Consumer [Member]	Dec. 31, 2013 Consumer [Member]	Mar. 31, 2014 North America [Member]	Dec. 31, 2013 North America [Member]	Mar. 31, 2014 North America [Member] Non-consumer [Member]	Dec. 31, 2013 North America [Member] Non-consumer [Member]	Mar. 31, 2014 North America [Member] Consumer [Member]	Dec. 31, 2013 North America [Member] Consumer [Member]	Mar. 31, 2014 International [Member]	Dec. 31, 2013 International [Member]	Mar. 31, 2014 International [Member] Non-consumer [Member]	Dec. 31, 2013 International [Member] Non-consumer [Member]	Mar. 31, 2014 International [Member] Consumer [Member]	Dec. 31, 2013 International [Member] Consumer [Member]	Mar. 31, 2014 Wholesale and Dealer Loans [Member] Non-consumer [Member]	Dec. 31, 2013 Wholesale and Dealer Loans [Member] Non-consumer [Member]	Mar. 31, 2014 Wholesale and Dealer Loans [Member] North America [Member] Non-consumer [Member]	Dec. 31, 2013 Wholesale and Dealer Loans [Member] North America [Member] Non-consumer [Member]	Mar. 31, 2014 Wholesale and Dealer Loans [Member] International [Member] Non-consumer [Member]	Dec. 31, 2013 Wholesale and Dealer Loans [Member] International [Member] Non-consumer [Member]	Mar. 31, 2014 Special Mention [Member] Consumer [Member] Minimum [Member]	Mar. 31, 2014 Special Mention [Member] Consumer [Member] Maximum [Member]	Mar. 31, 2014 Pass Consumer [Member]	Mar. 31, 2014 Substandard Consumer [Member]	Mar. 31, 2014 Group I Wholesale and Dealer Loans [Member] Non-consumer [Member]	Dec. 31, 2013 Group I Wholesale and Dealer Loans [Member] Non-consumer [Member]	Mar. 31, 2014 Group I Wholesale and Dealer Loans [Member] North America [Member] Non-consumer [Member]	Dec. 31, 2013 Group I Wholesale and Dealer Loans [Member] North America [Member] Non-consumer [Member]	Mar. 31, 2014 Group I Wholesale and Dealer Loans [Member] International [Member] Non-consumer [Member]	Dec. 31, 2013 Group I Wholesale and Dealer Loans [Member] International [Member] Non-consumer [Member]	Mar. 31, 2014 Group II Wholesale and Dealer Loans [Member] Non-consumer [Member]	Dec. 31, 2013 Group II Wholesale and Dealer Loans [Member] Non-consumer [Member]	Mar. 31, 2014 Group II Wholesale and Dealer Loans [Member] North America [Member] Non-consumer [Member]	Dec. 31, 2013 Group II Wholesale and Dealer Loans [Member] North America [Member] Non-consumer [Member]	Mar. 31, 2014 Group II Wholesale and Dealer Loans [Member] International [Member] Non-consumer [Member]	Dec. 31, 2013 Group II Wholesale and Dealer Loans [Member] International [Member] Non-consumer [Member]	Mar. 31, 2014 Group III Wholesale and Dealer Loans [Member] Non-consumer [Member]	Dec. 31, 2013 Group III Wholesale and Dealer Loans [Member] Non-consumer [Member]	Mar. 31, 2014 Group III Wholesale and Dealer Loans [Member] North America [Member] Non-consumer [Member]	Dec. 31, 2013 Group III Wholesale and Dealer Loans [Member] North America [Member] Non-consumer [Member]	Mar. 31, 2014 Group III Wholesale and Dealer Loans [Member] International [Member] Non-consumer [Member]	Dec. 31, 2013 Group III Wholesale and Dealer Loans [Member] International [Member] Non-consumer [Member]	Mar. 31, 2014 Group IV Wholesale and Dealer Loans [Member] Non-consumer [Member]	Dec. 31, 2013 Group IV Wholesale and Dealer Loans [Member] Non-consumer [Member]	Mar. 31, 2014 Group IV Wholesale and Dealer Loans [Member] North America [Member] Non-consumer [Member]	Dec. 31, 2013 Group IV Wholesale and Dealer Loans [Member] North America [Member] Non-consumer [Member]	Mar. 31, 2014 Group IV Wholesale and Dealer Loans [Member] International [Member] Non-consumer [Member]	Dec. 31, 2013 Group IV Wholesale and Dealer Loans [Member] International [Member] Non-consumer [Member]
Credit quality ratings
Term, in days, for credit quality rating																												current to 60 days past due	greater than 120 days past due
Finance Receivables Credit Quality Ratings Term Range																										61 days	120 days
Finance Receivable Credit Quality [Abstract]
Financing Receivable By Credit Quality Indicator	$ 83,644	$ 81,173	$ 77,001	$ 33,104	$ 30,976	$ 50,540	$ 50,197	$ 63,355	$ 62,451	$ 23,920	$ 22,804	$ 39,435	$ 39,647	$ 20,289	$ 18,722	$ 9,184	$ 8,172	$ 11,105	$ 10,550	$ 31,930	$ 29,905	$ 23,110	$ 22,072	$ 8,820	$ 7,833					$ 25,371	$ 23,408	$ 19,464	$ 18,357	$ 5,907	$ 5,051	$ 5,564	$ 5,381	$ 3,306	$ 3,289	$ 2,258	$ 2,092	$ 932	$ 1,073	$ 330	$ 424	$ 602	$ 649	$ 63	$ 43	$ 10	$ 2	$ 53	$ 41