Transfers of Receivables - Assets and Liabilities of Securitizations (Details) - USD ($) $ in Millions | Mar. 31, 2016 | Dec. 31, 2015 | Mar. 31, 2015 | Dec. 31, 2014 |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | $ 10,350 | $ 8,886 | $ 7,294 | $ 6,179 |
Financing and Loans and Leases Receivable Allowance | 463 | 422 | 355 | $ 359 |
Finance Receivables & Net Investment In Operating Leases, After Allowance for Credit Losses | 126,164 | | $ 108,482 | |
Related Debt | 127,434 | 119,601 | | |
Variable Interest Entity, Primary Beneficiary [Member] | | | | |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | 2,602 | 3,949 | | |
Related Debt | 43,258 | 43,086 | | |
Securitization Transactions [Member] | Consolidated Entity Including Variable Interest Entities (VIE) [Member] | | | | |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | 3,000 | 4,300 | | |
Finance Receivables & Net Investment in Operating Leases, Before Allowance for Credit Losses | 70,800 | 67,000 | | |
Financing and Loans and Leases Receivable Allowance | 200 | 100 | | |
Finance Receivables & Net Investment In Operating Leases, After Allowance for Credit Losses | 70,600 | 66,900 | | |
Related Debt | 49,900 | 50,000 | | |
Securitization Transactions [Member] | Consolidated Entity Including Variable Interest Entities (VIE) [Member] | Financing Receivable [Member] | | | | |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | 2,300 | 3,800 | | |
Finance Receivables & Net Investment in Operating Leases, Before Allowance for Credit Losses | 57,500 | 53,700 | | |
Financing and Loans and Leases Receivable Allowance | 200 | 100 | | |
Finance Receivables & Net Investment In Operating Leases, After Allowance for Credit Losses | 57,300 | 53,600 | | |
Related Debt | 41,200 | 41,100 | | |
Securitization Transactions [Member] | Consolidated Entity Including Variable Interest Entities (VIE) [Member] | Retail [Member] | | | | |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | 2,000 | 1,800 | | |
Finance Receivables & Net Investment in Operating Leases, Before Allowance for Credit Losses | 30,700 | 27,600 | | |
Financing and Loans and Leases Receivable Allowance | 200 | 100 | | |
Finance Receivables & Net Investment In Operating Leases, After Allowance for Credit Losses | 30,500 | 27,500 | | |
Related Debt | 27,300 | 25,000 | | |
Securitization Transactions [Member] | Consolidated Entity Including Variable Interest Entities (VIE) [Member] | Wholesale [Member] | | | | |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | 300 | 2,000 | | |
Finance Receivables & Net Investment in Operating Leases, Before Allowance for Credit Losses | 26,800 | 26,100 | | |
Financing and Loans and Leases Receivable Allowance | 0 | 0 | | |
Finance Receivables & Net Investment In Operating Leases, After Allowance for Credit Losses | 26,800 | 26,100 | | |
Related Debt | 13,900 | 16,100 | | |
Securitization Transactions [Member] | Consolidated Entity Including Variable Interest Entities (VIE) [Member] | Net Investment in Operating Leases [Member] | | | | |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | 700 | 500 | | |
Finance Receivables & Net Investment in Operating Leases, Before Allowance for Credit Losses | 13,300 | 13,300 | | |
Financing and Loans and Leases Receivable Allowance | 0 | 0 | | |
Finance Receivables & Net Investment In Operating Leases, After Allowance for Credit Losses | 13,300 | 13,300 | | |
Related Debt | 8,700 | 8,900 | | |
Securitization Transactions [Member] | Variable Interest Entity, Primary Beneficiary [Member] | | | | |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | 2,600 | 3,900 | | |
Finance Receivables & Net Investment in Operating Leases, Before Allowance for Credit Losses | 63,500 | 59,300 | | |
Financing and Loans and Leases Receivable Allowance | 200 | 100 | | |
Finance Receivables & Net Investment In Operating Leases, After Allowance for Credit Losses | 63,300 | 59,200 | | |
Related Debt | 43,300 | 43,100 | | |
Securitization Transactions [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Financing Receivable [Member] | | | | |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | 1,900 | 3,400 | | |
Finance Receivables & Net Investment in Operating Leases, Before Allowance for Credit Losses | 50,200 | 46,000 | | |
Financing and Loans and Leases Receivable Allowance | 200 | 100 | | |
Finance Receivables & Net Investment In Operating Leases, After Allowance for Credit Losses | 50,000 | 45,900 | | |
Related Debt | 34,600 | 34,200 | | |
Securitization Transactions [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Retail [Member] | | | | |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | 1,600 | 1,400 | | |
Finance Receivables & Net Investment in Operating Leases, Before Allowance for Credit Losses | 24,200 | 20,900 | | |
Financing and Loans and Leases Receivable Allowance | 200 | 100 | | |
Finance Receivables & Net Investment In Operating Leases, After Allowance for Credit Losses | 24,000 | 20,800 | | |
Related Debt | 21,300 | 18,900 | | |
Securitization Transactions [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Wholesale [Member] | | | | |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | 300 | 2,000 | | |
Finance Receivables & Net Investment in Operating Leases, Before Allowance for Credit Losses | 26,000 | 25,100 | | |
Financing and Loans and Leases Receivable Allowance | 0 | 0 | | |
Finance Receivables & Net Investment In Operating Leases, After Allowance for Credit Losses | 26,000 | 25,100 | | |
Related Debt | 13,300 | 15,300 | | |
Securitization Transactions [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Net Investment in Operating Leases [Member] | | | | |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | 700 | 500 | | |
Finance Receivables & Net Investment in Operating Leases, Before Allowance for Credit Losses | 13,300 | 13,300 | | |
Financing and Loans and Leases Receivable Allowance | 0 | 0 | | |
Finance Receivables & Net Investment In Operating Leases, After Allowance for Credit Losses | 13,300 | 13,300 | | |
Related Debt | 8,700 | 8,900 | | |
Securitization Transactions [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | | | | |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | 400 | 400 | | |
Finance Receivables & Net Investment in Operating Leases, Before Allowance for Credit Losses | 7,300 | 7,700 | | |
Financing and Loans and Leases Receivable Allowance | 0 | 0 | | |
Finance Receivables & Net Investment In Operating Leases, After Allowance for Credit Losses | 7,300 | 7,700 | | |
Related Debt | 6,600 | 6,900 | | |
Securitization Transactions [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Financing Receivable [Member] | | | | |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | 400 | 400 | | |
Finance Receivables & Net Investment in Operating Leases, Before Allowance for Credit Losses | 7,300 | 7,700 | | |
Financing and Loans and Leases Receivable Allowance | 0 | 0 | | |
Finance Receivables & Net Investment In Operating Leases, After Allowance for Credit Losses | 7,300 | 7,700 | | |
Related Debt | 6,600 | 6,900 | | |
Securitization Transactions [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Retail [Member] | | | | |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | 400 | 400 | | |
Finance Receivables & Net Investment in Operating Leases, Before Allowance for Credit Losses | 6,500 | 6,700 | | |
Financing and Loans and Leases Receivable Allowance | 0 | 0 | | |
Finance Receivables & Net Investment In Operating Leases, After Allowance for Credit Losses | 6,500 | 6,700 | | |
Related Debt | 6,000 | 6,100 | | |
Securitization Transactions [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Wholesale [Member] | | | | |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | 0 | 0 | | |
Finance Receivables & Net Investment in Operating Leases, Before Allowance for Credit Losses | 800 | 1,000 | | |
Financing and Loans and Leases Receivable Allowance | 0 | 0 | | |
Finance Receivables & Net Investment In Operating Leases, After Allowance for Credit Losses | 800 | 1,000 | | |
Related Debt | 600 | 800 | | |
Securitization Transactions [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Net Investment in Operating Leases [Member] | | | | |
Securitization Transactions [Line Items] | | | | |
Cash and cash equivalents | 0 | 0 | | |
Finance Receivables & Net Investment in Operating Leases, Before Allowance for Credit Losses | 0 | 0 | | |
Financing and Loans and Leases Receivable Allowance | 0 | 0 | | |
Finance Receivables & Net Investment In Operating Leases, After Allowance for Credit Losses | 0 | 0 | | |
Related Debt | $ 0 | $ 0 | | |