Transfers of Receivables - Assets and Liabilities of Securitizations (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Securitization Transactions [Line Items]
Cash and cash equivalents	$ 6,298	$ 10,963
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	115,627		$ 117,760
Related Debt	109,461	117,717
Total assets	128,250	134,945	$ 138,811
Unencumbered Assets	500	900
Consolidated Entities [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,600	3,800
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	60,600	58,500
Allowance for Credit Losses	300	400
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	60,300	58,100
Related Debt	47,100	45,400
Consolidated Entities [Member] | Securitization Transactions [Member] | Financing Receivable [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,000	3,400
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	50,100	51,000
Allowance for Credit Losses	300	400
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	49,800	50,600
Related Debt	40,000	40,300
Consolidated Entities [Member] | Securitization Transactions [Member] | Retail [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	1,900	2,100
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	36,500	39,000
Allowance for Credit Losses	300	400
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	36,200	38,600
Related Debt	31,200	31,400
Consolidated Entities [Member] | Securitization Transactions [Member] | Wholesale [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	100	1,300
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	13,600	12,000
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	13,600	12,000
Related Debt	8,800	8,900
Consolidated Entities [Member] | Securitization Transactions [Member] | Net Investment in Operating Leases [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	600	400
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	10,500	7,500
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	10,500	7,500
Related Debt	7,100	5,100
Variable Interest Entity, Primary Beneficiary [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,284	3,407
Related Debt	41,072	38,274
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,300	3,400
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	53,900	50,800
Allowance for Credit Losses	200	300
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	53,700	50,500
Related Debt	41,100	38,300
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Financing Receivable [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	1,700	3,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	43,400	43,300
Allowance for Credit Losses	200	300
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	43,200	43,000
Related Debt	34,000	33,200
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Retail [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	1,600	1,700
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	30,100	31,600
Allowance for Credit Losses	200	300
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	29,900	31,300
Related Debt	25,400	24,500
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Wholesale [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	100	1,300
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	13,300	11,700
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	13,300	11,700
Related Debt	8,600	8,700
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Net Investment in Operating Leases [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	600	400
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	10,500	7,500
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	10,500	7,500
Related Debt	7,100	5,100
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	300	400
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	6,700	7,700
Allowance for Credit Losses	100	100
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	6,600	7,600
Related Debt	6,000	7,100
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member] | Financing Receivable [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	300	400
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	6,700	7,700
Allowance for Credit Losses	100	100
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	6,600	7,600
Related Debt	6,000	7,100
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member] | Retail [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	300	400
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	6,400	7,400
Allowance for Credit Losses	100	100
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	6,300	7,300
Related Debt	5,800	6,900
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	300
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	300	300
Related Debt	200	200
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