Finance Receivables - Credit Quality (Details) (Financial Services [Member], USD $) In Millions, unless otherwise specified								9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2013 Non-consumer [Member]	Dec. 31, 2012 Non-consumer [Member]	Sep. 30, 2013 Consumer [Member]	Dec. 31, 2012 Consumer [Member]	Sep. 30, 2013 Consumer [Member] Pass	Sep. 30, 2013 Consumer [Member] Special Mention Minimum [Member]	Sep. 30, 2013 Consumer [Member] Special Mention Maximum [Member]	Sep. 30, 2013 Consumer [Member] Substandard	Sep. 30, 2013 North America [Member]	Dec. 31, 2012 North America [Member]	Sep. 30, 2013 North America [Member] Non-consumer [Member]	Dec. 31, 2012 North America [Member] Non-consumer [Member]	Sep. 30, 2013 North America [Member] Consumer [Member]	Dec. 31, 2012 North America [Member] Consumer [Member]	Sep. 30, 2013 International [Member]	Dec. 31, 2012 International [Member]	Sep. 30, 2013 International [Member] Non-consumer [Member]	Dec. 31, 2012 International [Member] Non-consumer [Member]	Sep. 30, 2013 International [Member] Consumer [Member]	Dec. 31, 2012 International [Member] Consumer [Member]	Sep. 30, 2013 Dealer Financing [Member] Non-consumer [Member]	Dec. 31, 2012 Dealer Financing [Member] Non-consumer [Member]	Sep. 30, 2013 Dealer Financing [Member] Non-consumer [Member] Group I	Dec. 31, 2012 Dealer Financing [Member] Non-consumer [Member] Group I	Sep. 30, 2013 Dealer Financing [Member] Non-consumer [Member] Group II	Dec. 31, 2012 Dealer Financing [Member] Non-consumer [Member] Group II	Sep. 30, 2013 Dealer Financing [Member] Non-consumer [Member] Group III	Dec. 31, 2012 Dealer Financing [Member] Non-consumer [Member] Group III	Sep. 30, 2013 Dealer Financing [Member] Non-consumer [Member] Group IV	Dec. 31, 2012 Dealer Financing [Member] Non-consumer [Member] Group IV	Sep. 30, 2013 Dealer Financing [Member] North America [Member] Non-consumer [Member]	Dec. 31, 2012 Dealer Financing [Member] North America [Member] Non-consumer [Member]	Sep. 30, 2013 Dealer Financing [Member] North America [Member] Non-consumer [Member] Group I	Dec. 31, 2012 Dealer Financing [Member] North America [Member] Non-consumer [Member] Group I	Sep. 30, 2013 Dealer Financing [Member] North America [Member] Non-consumer [Member] Group II	Dec. 31, 2012 Dealer Financing [Member] North America [Member] Non-consumer [Member] Group II	Sep. 30, 2013 Dealer Financing [Member] North America [Member] Non-consumer [Member] Group III	Dec. 31, 2012 Dealer Financing [Member] North America [Member] Non-consumer [Member] Group III	Sep. 30, 2013 Dealer Financing [Member] North America [Member] Non-consumer [Member] Group IV	Dec. 31, 2012 Dealer Financing [Member] North America [Member] Non-consumer [Member] Group IV	Sep. 30, 2013 Dealer Financing [Member] International [Member] Non-consumer [Member]	Dec. 31, 2012 Dealer Financing [Member] International [Member] Non-consumer [Member]	Sep. 30, 2013 Dealer Financing [Member] International [Member] Non-consumer [Member] Group I	Dec. 31, 2012 Dealer Financing [Member] International [Member] Non-consumer [Member] Group I	Sep. 30, 2013 Dealer Financing [Member] International [Member] Non-consumer [Member] Group II	Dec. 31, 2012 Dealer Financing [Member] International [Member] Non-consumer [Member] Group II	Sep. 30, 2013 Dealer Financing [Member] International [Member] Non-consumer [Member] Group III	Dec. 31, 2012 Dealer Financing [Member] International [Member] Non-consumer [Member] Group III	Sep. 30, 2013 Dealer Financing [Member] International [Member] Non-consumer [Member] Group IV	Dec. 31, 2012 Dealer Financing [Member] International [Member] Non-consumer [Member] Group IV
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	$ 78,370	$ 76,159	$ 72,992	$ 29,049	$ 27,746	$ 49,321	$ 48,413					$ 60,330	$ 58,358	$ 21,085	$ 20,118	$ 39,245	$ 38,240	$ 18,040	$ 17,801	$ 7,964	$ 7,628	$ 10,076	$ 10,173	$ 27,934	$ 26,671	$ 21,919	$ 21,077	$ 5,029	$ 4,013	$ 952	$ 1,556	$ 34	$ 25	$ 20,326	$ 19,429	$ 17,006	$ 16,526	$ 2,970	$ 2,608	$ 349	$ 277	$ 1	$ 18	$ 7,608	$ 7,242	$ 4,913	$ 4,551	$ 2,059	$ 1,405	$ 603	$ 1,279	$ 33	$ 7