Input Hierarchy of Items Measured at Fair Value on a Nonrecurring Basis (Details) (Financial Services [Member], Fair Value, Measurements, Nonrecurring [Member], USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure	$ 84	$ 115
North America [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure	57	76
North America [Member] | Retail [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure	55	70
North America [Member] | Dealer loans [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure	2	6
International [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure	27	39
International [Member] | Retail [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure	27	39
Level 1 [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure
Level 1 [Member] | North America [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure
Level 1 [Member] | North America [Member] | Retail [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure
Level 1 [Member] | North America [Member] | Dealer loans [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure
Level 1 [Member] | International [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure
Level 1 [Member] | International [Member] | Retail [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure
Level 2 [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure
Level 2 [Member] | North America [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure
Level 2 [Member] | North America [Member] | Retail [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure
Level 2 [Member] | North America [Member] | Dealer loans [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure
Level 2 [Member] | International [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure
Level 2 [Member] | International [Member] | Retail [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure
Level 3 [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure	84	115
Level 3 [Member] | North America [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure	57	76
Level 3 [Member] | North America [Member] | Retail [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure	55	70
Level 3 [Member] | North America [Member] | Dealer loans [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure	2	6
Level 3 [Member] | International [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure	27	39
Level 3 [Member] | International [Member] | Retail [Member]
Items measured at fair value [Line Items]
Financing Receivable Fair Value Disclosure	$ 27	$ 39