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	$ 13,087
Amounts due in 2015	6,497
Amounts due in 2016	4,423
Amounts due in 2017	2,731
Amounts due in 2018	1,104
Amounts due thereafter	1,238
Total amounts due	29,080
Guaranteed residual value	443
Unguaranteed residual value	519
Less: Unearned income	(976)	(998)	(944)
Total gross finance receivables	29,066	28,568	25,115
Less: Allowance for credit losses	(387)	(429)	(371)	(364)
Total net finance receivables	28,679	28,139	24,744
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	3,265
Amounts due in 2015	2,207
Amounts due in 2016	1,309
Amounts due in 2017	593
Amounts due in 2018	206
Amounts due thereafter	139
Total amounts due	7,719
Guaranteed residual value	385
Unguaranteed residual value	494
Less: Unearned income	(739)
Total gross finance receivables	7,859
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	3,626
Amounts due in 2015	2,262
Amounts due in 2016	1,757
Amounts due in 2017	1,474
Amounts due in 2018	669
Amounts due thereafter	1,070
Total amounts due	10,858
Guaranteed residual value	0
Unguaranteed residual value	0
Less: Unearned income	(89)
Total gross finance receivables	10,769
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