Financing Activities (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivable
Amounts due in 2014	$ 13,101
Amounts due in 2015	6,506
Amounts due in 2016	4,429
Amounts due in 2017	2,734
Amounts due in 2018	1,105
Amounts due thereafter	1,238
Total amounts due	29,113
Guaranteed residual value	444
Unguaranteed residual value	521
Less: Unearned income	(976)	(998)	(944)
Total gross finance receivables	29,102	28,583	25,125
Less: Allowance for credit losses	(378)	(426)	(369)	(363)
Total net finance receivables	28,724	28,157	24,756
Retail Installment Sale Contracts
Accounts, Notes, Loans and Financing Receivable
Amounts due in 2014	2,218
Amounts due in 2015	1,709
Amounts due in 2016	1,156
Amounts due in 2017	626
Amounts due in 2018	215
Amounts due thereafter	29
Total amounts due	5,953
Guaranteed residual value	0
Unguaranteed residual value	0
Less: Unearned income	(100)
Total gross finance receivables	5,853
Wholesale Installment Sale Contracts
Accounts, Notes, Loans and Financing Receivable
Amounts due in 2014	145
Amounts due in 2015	24
Amounts due in 2016	14
Amounts due in 2017	3
Amounts due in 2018	0
Amounts due thereafter	0
Total amounts due	186
Guaranteed residual value	0
Unguaranteed residual value	0
Less: Unearned income	(1)
Total gross finance receivables	185
Retail Finance Leases
Accounts, Notes, Loans and Financing Receivable
Amounts due in 2014	3,277
Amounts due in 2015	2,215
Amounts due in 2016	1,314
Amounts due in 2017	595
Amounts due in 2018	207
Amounts due thereafter	139
Total amounts due	7,747
Guaranteed residual value	386
Unguaranteed residual value	496
Less: Unearned income	(739)
Total gross finance receivables	7,890
Wholesale Finance Leases
Accounts, Notes, Loans and Financing Receivable
Amounts due in 2014	84
Amounts due in 2015	64
Amounts due in 2016	37
Amounts due in 2017	17
Amounts due in 2018	9
Amounts due thereafter	0
Total amounts due	211
Guaranteed residual value	58
Unguaranteed residual value	25
Less: Unearned income	(22)
Total gross finance receivables	272
Retail Notes
Accounts, Notes, Loans and Financing Receivable
Amounts due in 2014	3,628
Amounts due in 2015	2,263
Amounts due in 2016	1,758
Amounts due in 2017	1,475
Amounts due in 2018	669
Amounts due thereafter	1,070
Total amounts due	10,863
Guaranteed residual value	0
Unguaranteed residual value	0
Less: Unearned income	(89)
Total gross finance receivables	10,774
Wholesale Notes
Accounts, Notes, Loans and Financing Receivable
Amounts due in 2014	3,749
Amounts due in 2015	231
Amounts due in 2016	150
Amounts due in 2017	18
Amounts due in 2018	5
Amounts due thereafter	0
Total amounts due	4,153
Guaranteed residual value	0
Unguaranteed residual value	0
Less: Unearned income	(25)
Total gross finance receivables	$ 4,128