Finance Receivables Net (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Wholesale Loans Percentage of Dealer Financing	95.00%
Net Finance Receivables [Abstract]
Finance receivables, net	$ 71,510,000,000	$ 69,976,000,000
Financial Services [Member]
Net Finance Receivables [Abstract]
Financing Receivable, Gross	76,159,000,000	73,831,000,000
Less: Allowance for Credit Losses	(389,000,000)	(501,000,000)	(777,000,000)
Finance receivables, net	75,770,000,000	73,330,000,000
Net finance receivables subject to fair value	73,618,000,000	70,754,000,000
Fair value	75,618,000,000	72,294,000,000
Finance Receivables Net Not Subject To Fair Value	2,200,000,000	2,600,000,000
Financial Services [Member] | North America [Member]
Net Finance Receivables [Abstract]
Finance Receivable Before Unearned Interest Supplements	59,622,000,000
Financing Receivable, Gross	58,358,000,000	54,227,000,000
Less: Allowance for Credit Losses	(309,000,000)	(388,000,000)
Finance receivables, net	58,049,000,000	53,839,000,000
Financial Services [Member] | International [Member]
Net Finance Receivables [Abstract]
Finance Receivable Before Unearned Interest Supplements	18,088,000,000
Financing Receivable, Gross	17,801,000,000	19,604,000,000
Less: Allowance for Credit Losses	(80,000,000)	(113,000,000)
Finance receivables, net	17,721,000,000	19,491,000,000
Financial Services [Member] | Consumer [Member]
Net Finance Receivables [Abstract]
Finance Receivable Before Unearned Interest Supplements	49,964,000,000	49,493,000,000
Less: Unearned interest supplements	(1,551,000,000)	(1,742,000,000)
Financing Receivable, Gross	48,413,000,000	47,751,000,000
Financial Services [Member] | Consumer [Member] | North America [Member]
Net Finance Receivables [Abstract]
Finance Receivable Before Unearned Interest Supplements	39,504,000,000	38,410,000,000
Less: Unearned interest supplements	(1,264,000,000)	(1,407,000,000)
Financing Receivable, Gross	38,240,000,000	37,003,000,000
Amount of finance receivables that secure certain debt obligations	23,000,000,000	29,400,000,000
Financial Services [Member] | Consumer [Member] | International [Member]
Net Finance Receivables [Abstract]
Finance Receivable Before Unearned Interest Supplements	10,460,000,000	11,083,000,000
Less: Unearned interest supplements	(287,000,000)	(335,000,000)
Financing Receivable, Gross	10,173,000,000	10,748,000,000
Amount of finance receivables that secure certain debt obligations	6,600,000,000	7,100,000,000
Financial Services [Member] | Non-consumer [Member]
Net Finance Receivables [Abstract]
Financing Receivable, Gross	27,746,000,000	26,080,000,000
Financial Services [Member] | Non-consumer [Member] | North America [Member]
Net Finance Receivables [Abstract]
Financing Receivable, Gross	20,118,000,000	17,224,000,000
Amount of finance receivables that secure certain debt obligations	17,100,000,000	14,200,000,000
Financial Services [Member] | Non-consumer [Member] | International [Member]
Net Finance Receivables [Abstract]
Financing Receivable, Gross	7,628,000,000	8,856,000,000
Amount of finance receivables that secure certain debt obligations	4,500,000,000	5,600,000,000
Financial Services [Member] | Non-consumer [Member] | Wholesale and Dealer Loans [Member]
Net Finance Receivables [Abstract]
Financing Receivable, Gross	26,671,000,000	24,980,000,000
Financial Services [Member] | Non-consumer [Member] | Wholesale and Dealer Loans [Member] | North America [Member]
Net Finance Receivables [Abstract]
Finance Receivable Before Unearned Interest Supplements	19,429,000,000
Financing Receivable, Gross	19,429,000,000	16,501,000,000
Financial Services [Member] | Non-consumer [Member] | Wholesale and Dealer Loans [Member] | International [Member]
Net Finance Receivables [Abstract]
Finance Receivable Before Unearned Interest Supplements	7,242,000,000
Financing Receivable, Gross	7,242,000,000	8,479,000,000
Financial Services [Member] | Non-consumer [Member] | Other [Member]
Net Finance Receivables [Abstract]
Financing Receivable, Gross	1,075,000,000	1,100,000,000
Financial Services [Member] | Non-consumer [Member] | Other [Member] | North America [Member]
Net Finance Receivables [Abstract]
Finance Receivable Before Unearned Interest Supplements	689,000,000
Financing Receivable, Gross	689,000,000	723,000,000
Financial Services [Member] | Non-consumer [Member] | Other [Member] | International [Member]
Net Finance Receivables [Abstract]
Finance Receivable Before Unearned Interest Supplements	386,000,000
Financing Receivable, Gross	386,000,000	377,000,000
Other Assets on Statement of Financial Position [Member] | Financial Services [Member]
Net Finance Receivables [Abstract]
Uncollected Interest Receivable Excluded From Finance Receivable	$ 183,000,000	$ 180,000,000