Transfers of Receivables - Assets and Liabilities of Securitizations (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Securitization Transactions [Line Items]
Cash and cash equivalents	$ 6,351,000,000	$ 10,963,000,000
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	115,472,000,000		$ 116,463,000,000
Related Debt	108,044,000,000	117,717,000,000
Total assets	127,918,000,000	134,945,000,000	$ 136,068,000,000
Unencumbered Assets	400,000,000	900,000,000
Consolidated Entities [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,600,000,000	3,800,000,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	66,000,000,000.0	58,500,000,000
Allowance for Credit Losses	400,000,000	400,000,000
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	65,600,000,000	58,100,000,000
Related Debt	48,900,000,000	45,400,000,000
Consolidated Entities [Member] | Securitization Transactions [Member] | Financing Receivable [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,100,000,000	3,400,000,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	55,000,000,000.0	51,000,000,000.0
Allowance for Credit Losses	400,000,000	400,000,000
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	54,600,000,000	50,600,000,000
Related Debt	41,600,000,000	40,300,000,000
Consolidated Entities [Member] | Securitization Transactions [Member] | Retail [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,000,000,000.0	2,100,000,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	40,700,000,000	39,000,000,000.0
Allowance for Credit Losses	400,000,000	400,000,000
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	40,300,000,000	38,600,000,000
Related Debt	34,900,000,000	31,400,000,000
Consolidated Entities [Member] | Securitization Transactions [Member] | Wholesale [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	100,000,000	1,300,000,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	14,300,000,000	12,000,000,000.0
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	14,300,000,000	12,000,000,000.0
Related Debt	6,700,000,000	8,900,000,000
Consolidated Entities [Member] | Securitization Transactions [Member] | Net Investment in Operating Leases [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	500,000,000	400,000,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	11,000,000,000.0	7,500,000,000
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	11,000,000,000.0	7,500,000,000
Related Debt	7,300,000,000	5,100,000,000
Variable Interest Entity, Primary Beneficiary [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,116,000,000	3,407,000,000
Related Debt	38,121,000,000	38,274,000,000
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,100,000,000	3,400,000,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	54,000,000,000.0	50,800,000,000
Allowance for Credit Losses	300,000,000	300,000,000
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	53,700,000,000	50,500,000,000
Related Debt	38,100,000,000	38,300,000,000
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Financing Receivable [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	1,600,000,000	3,000,000,000.0
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	43,000,000,000.0	43,300,000,000
Allowance for Credit Losses	300,000,000	300,000,000
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	42,700,000,000	43,000,000,000.0
Related Debt	30,800,000,000	33,200,000,000
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Retail [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	1,500,000,000	1,700,000,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	29,000,000,000.0	31,600,000,000
Allowance for Credit Losses	300,000,000	300,000,000
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	28,700,000,000	31,300,000,000
Related Debt	24,400,000,000	24,500,000,000
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Wholesale [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	100,000,000	1,300,000,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	14,000,000,000.0	11,700,000,000
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	14,000,000,000.0	11,700,000,000
Related Debt	6,400,000,000	8,700,000,000
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Net Investment in Operating Leases [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	500,000,000	400,000,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	11,000,000,000.0	7,500,000,000
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	11,000,000,000.0	7,500,000,000
Related Debt	7,300,000,000	5,100,000,000
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	500,000,000	400,000,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	12,000,000,000.0	7,700,000,000
Allowance for Credit Losses	100,000,000	100,000,000
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	11,900,000,000	7,600,000,000
Related Debt	10,800,000,000	7,100,000,000
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member] | Financing Receivable [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	500,000,000	400,000,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	12,000,000,000.0	7,700,000,000
Allowance for Credit Losses	100,000,000	100,000,000
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	11,900,000,000	7,600,000,000
Related Debt	10,800,000,000	7,100,000,000
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member] | Retail [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	500,000,000	400,000,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	11,700,000,000	7,400,000,000
Allowance for Credit Losses	100,000,000	100,000,000
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	11,600,000,000	7,300,000,000
Related Debt	10,500,000,000	6,900,000,000
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member] | Wholesale [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	0	0
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	300,000,000	300,000,000
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	300,000,000	300,000,000
Related Debt	300,000,000	200,000,000
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member] | Net Investment in Operating Leases [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	0	0
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	0	0
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	0	0
Related Debt	$ 0	$ 0