Finance Receivables Finance Receivables Aging (Details) (Financial Services [Member], USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Financing Receivables [Line Items]
Number Of Days After Which Finance Receivable Is Considered Past Due	any payment, including principal and interest, that has not been collected and is at least 31 days past the contractual due date
Financing Receivable Recorded Investment 31 To 60 Days Past Due	$ 669
Financing Receivable Recorded Investment 61 To 90 Days Past Due	98
Financing Receivable Recorded Investment 91 To 120 Days Past Due	37
Financing Receivable Recorded Investment Greater Than 120 Days Past Due	106
Financing Receivable, Recorded Investment, Past Due	910
Financing Receivable, Recorded Investment, Current	72,082
Financing Receivable, Gross	72,992	73,831
Consumer [Member]
Financing Receivables [Line Items]
Financing Receivable, Gross	48,207	47,751
Consumer [Member] | Retail [Member]
Financing Receivables [Line Items]
Financing Receivable, Gross	45,999	45,180
Consumer [Member] | Direct financing leases [Member]
Financing Receivables [Line Items]
Financing Receivable, Gross	2,208	2,571
Non-consumer [Member]
Financing Receivables [Line Items]
Financing Receivable, Gross	24,785	26,080
Non-consumer [Member] | Wholesale [Member]
Financing Receivables [Line Items]
Financing Receivable, Gross	22,309	23,829
Non-consumer [Member] | Dealer loans [Member]
Financing Receivables [Line Items]
Financing Receivable, Gross	1,204	1,151
Non-consumer [Member] | Other [Member]
Financing Receivables [Line Items]
Financing Receivable, Gross	1,272	1,100
North America [Member]
Financing Receivables [Line Items]
Financing Receivable Recorded Investment 31 To 60 Days Past Due	628
Financing Receivable Recorded Investment 61 To 90 Days Past Due	77
Financing Receivable Recorded Investment 91 To 120 Days Past Due	25
Financing Receivable Recorded Investment Greater Than 120 Days Past Due	68
Financing Receivable, Recorded Investment, Past Due	798
Financing Receivable, Recorded Investment, Current	54,727
Financing Receivable, Gross	55,525	54,227
North America [Member] | Consumer [Member]
Financing Receivables [Line Items]
Financing Receivable, Gross	37,984	37,003
North America [Member] | Consumer [Member] | Retail [Member]
Financing Receivables [Line Items]
Financing Receivable Recorded Investment 31 To 60 Days Past Due	625
Financing Receivable Recorded Investment 61 To 90 Days Past Due	72
Financing Receivable Recorded Investment 91 To 120 Days Past Due	20
Financing Receivable Recorded Investment Greater Than 120 Days Past Due	55
Financing Receivable, Recorded Investment, Past Due	772
Financing Receivable, Recorded Investment, Current	37,181
Financing Receivable, Gross	37,953	36,999
North America [Member] | Consumer [Member] | Direct financing leases [Member]
Financing Receivables [Line Items]
Financing Receivable Recorded Investment 31 To 60 Days Past Due
Financing Receivable Recorded Investment 61 To 90 Days Past Due
Financing Receivable Recorded Investment 91 To 120 Days Past Due
Financing Receivable Recorded Investment Greater Than 120 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing Receivable, Recorded Investment, Current	31
Financing Receivable, Gross	31	4
North America [Member] | Non-consumer [Member]
Financing Receivables [Line Items]
Financing Receivable, Gross	17,541	17,224
North America [Member] | Non-consumer [Member] | Wholesale [Member]
Financing Receivables [Line Items]
Financing Receivable Recorded Investment 31 To 60 Days Past Due
Financing Receivable Recorded Investment 61 To 90 Days Past Due	1
Financing Receivable Recorded Investment 91 To 120 Days Past Due	1
Financing Receivable Recorded Investment Greater Than 120 Days Past Due	2
Financing Receivable, Recorded Investment, Past Due	4
Financing Receivable, Recorded Investment, Current	15,513
Financing Receivable, Gross	15,517	15,413
North America [Member] | Non-consumer [Member] | Dealer loans [Member]
Financing Receivables [Line Items]
Financing Receivable Recorded Investment 31 To 60 Days Past Due	3
Financing Receivable Recorded Investment 61 To 90 Days Past Due	4
Financing Receivable Recorded Investment 91 To 120 Days Past Due	4
Financing Receivable Recorded Investment Greater Than 120 Days Past Due	11
Financing Receivable, Recorded Investment, Past Due	22
Financing Receivable, Recorded Investment, Current	1,124
Financing Receivable, Gross	1,146	1,088
North America [Member] | Non-consumer [Member] | Other [Member]
Financing Receivables [Line Items]
Financing Receivable Recorded Investment 31 To 60 Days Past Due
Financing Receivable Recorded Investment 61 To 90 Days Past Due
Financing Receivable Recorded Investment 91 To 120 Days Past Due
Financing Receivable Recorded Investment Greater Than 120 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing Receivable, Recorded Investment, Current	878
Financing Receivable, Gross	878	723
International [Member]
Financing Receivables [Line Items]
Financing Receivable Recorded Investment 31 To 60 Days Past Due	41
Financing Receivable Recorded Investment 61 To 90 Days Past Due	21
Financing Receivable Recorded Investment 91 To 120 Days Past Due	12
Financing Receivable Recorded Investment Greater Than 120 Days Past Due	38
Financing Receivable, Recorded Investment, Past Due	112
Financing Receivable, Recorded Investment, Current	17,355
Financing Receivable, Gross	17,467	19,604
International [Member] | Consumer [Member]
Financing Receivables [Line Items]
Financing Receivable, Gross	10,223	10,748
International [Member] | Consumer [Member] | Retail [Member]
Financing Receivables [Line Items]
Financing Receivable Recorded Investment 31 To 60 Days Past Due	34
Financing Receivable Recorded Investment 61 To 90 Days Past Due	18
Financing Receivable Recorded Investment 91 To 120 Days Past Due	10
Financing Receivable Recorded Investment Greater Than 120 Days Past Due	28
Financing Receivable, Recorded Investment, Past Due	90
Financing Receivable, Recorded Investment, Current	7,956
Financing Receivable, Gross	8,046	8,181
International [Member] | Consumer [Member] | Direct financing leases [Member]
Financing Receivables [Line Items]
Financing Receivable Recorded Investment 31 To 60 Days Past Due	6
Financing Receivable Recorded Investment 61 To 90 Days Past Due	3
Financing Receivable Recorded Investment 91 To 120 Days Past Due	2
Financing Receivable Recorded Investment Greater Than 120 Days Past Due	3
Financing Receivable, Recorded Investment, Past Due	14
Financing Receivable, Recorded Investment, Current	2,163
Financing Receivable, Gross	2,177	2,567
International [Member] | Non-consumer [Member]
Financing Receivables [Line Items]
Financing Receivable, Gross	7,244	8,856
International [Member] | Non-consumer [Member] | Wholesale [Member]
Financing Receivables [Line Items]
Financing Receivable Recorded Investment 31 To 60 Days Past Due	1
Financing Receivable Recorded Investment 61 To 90 Days Past Due
Financing Receivable Recorded Investment 91 To 120 Days Past Due
Financing Receivable Recorded Investment Greater Than 120 Days Past Due	4
Financing Receivable, Recorded Investment, Past Due	5
Financing Receivable, Recorded Investment, Current	6,787
Financing Receivable, Gross	6,792	8,416
International [Member] | Non-consumer [Member] | Dealer loans [Member]
Financing Receivables [Line Items]
Financing Receivable Recorded Investment 31 To 60 Days Past Due
Financing Receivable Recorded Investment 61 To 90 Days Past Due
Financing Receivable Recorded Investment 91 To 120 Days Past Due
Financing Receivable Recorded Investment Greater Than 120 Days Past Due	1
Financing Receivable, Recorded Investment, Past Due	1
Financing Receivable, Recorded Investment, Current	57
Financing Receivable, Gross	58	63
International [Member] | Non-consumer [Member] | Other [Member]
Financing Receivables [Line Items]
Financing Receivable Recorded Investment 31 To 60 Days Past Due
Financing Receivable Recorded Investment 61 To 90 Days Past Due
Financing Receivable Recorded Investment 91 To 120 Days Past Due
Financing Receivable Recorded Investment Greater Than 120 Days Past Due	2
Financing Receivable, Recorded Investment, Past Due	2
Financing Receivable, Recorded Investment, Current	392
Financing Receivable, Gross	$ 394	$ 377