Transfers of Receivables - Assets and Liabilities of Securitizations (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Securitization Transactions [Line Items]
Cash and cash equivalents	$ 10,579	$ 10,963
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	117,395		$ 127,138
Related Debt	115,516	117,717
Total assets	133,577	134,945	$ 147,268
Unencumbered Assets	1,000	900
Consolidated Entities [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,900	3,800
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	60,400	58,500
Allowance for Credit Losses	300	400
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	60,100	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	2,400	3,400
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	50,200	51,000
Allowance for Credit Losses	300	400
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	49,900	50,600
Related Debt	40,300	40,300
Consolidated Entities [Member] | Securitization Transactions [Member] | Retail [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,100	2,100
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	38,300	39,000
Allowance for Credit Losses	300	400
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	38,000	38,600
Related Debt	32,100	31,400
Consolidated Entities [Member] | Securitization Transactions [Member] | Wholesale [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	300	1,300
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	11,900	12,000
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	11,900	12,000
Related Debt	8,200	8,900
Consolidated Entities [Member] | Securitization Transactions [Member] | Net Investment in Operating Leases [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	500	400
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	10,200	7,500
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	10,200	7,500
Related Debt	6,800	5,100
Variable Interest Entity, Primary Beneficiary [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,473	3,407
Related Debt	40,139	38,274
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,500	3,400
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	52,600	50,800
Allowance for Credit Losses	300	300
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	52,300	50,500
Related Debt	40,100	38,300
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Financing Receivable [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,000	3,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	42,400	43,300
Allowance for Credit Losses	300	300
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	42,100	43,000
Related Debt	33,300	33,200
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Retail [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	1,700	1,700
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	30,800	31,600
Allowance for Credit Losses	300	300
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	30,500	31,300
Related Debt	25,300	24,500
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Wholesale [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	300	1,300
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	11,600	11,700
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	11,600	11,700
Related Debt	8,000	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	500	400
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	10,200	7,500
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	10,200	7,500
Related Debt	6,800	5,100
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	400	400
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	7,800	7,700
Allowance for Credit Losses	0	100
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	7,800	7,600
Related Debt	7,000	7,100
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member] | Financing Receivable [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	400	400
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	7,800	7,700
Allowance for Credit Losses	0	100
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	7,800	7,600
Related Debt	7,000	7,100
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member] | Retail [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	400	400
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	7,500	7,400
Allowance for Credit Losses	0	100
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	7,500	7,300
Related Debt	6,800	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