Transfers of Receivables - Assets and Liabilities of Securitizations (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Securitization Transactions [Line Items]
Cash and cash equivalents	$ 10,651	$ 10,393
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	126,327		$ 115,472
Related Debt	122,892	119,039
Total assets	143,551	138,576	$ 127,918
Consolidated Entities [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,800	2,800
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	73,500	74,600
Allowance for Credit Losses	500	500
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	73,000	74,100
Related Debt	55,900	56,400
Consolidated Entities [Member] | Securitization Transactions [Member] | Financing Receivable [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,300	2,200
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	62,900	62,100
Allowance for Credit Losses	500	500
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	62,400	61,600
Related Debt	48,600	48,200
Consolidated Entities [Member] | Securitization Transactions [Member] | Retail [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,100	2,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	45,200	43,900
Allowance for Credit Losses	500	500
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	44,700	43,400
Related Debt	37,600	37,300
Consolidated Entities [Member] | Securitization Transactions [Member] | Wholesale [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	200	200
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	17,700	18,200
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	17,700	18,200
Related Debt	11,000	10,900
Consolidated Entities [Member] | Securitization Transactions [Member] | Net Investment in Operating Leases [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	500	600
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	10,600	12,500
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	10,600	12,500
Related Debt	7,300	8,200
Variable Interest Entity, Primary Beneficiary [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,348	2,274
Related Debt	46,664	45,451
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,300	2,300
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	62,700	61,900
Allowance for Credit Losses	300	300
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	62,400	61,600
Related Debt	46,700	45,400
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Financing Receivable [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	1,800	1,700
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	52,100	49,400
Allowance for Credit Losses	300	300
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	51,800	49,100
Related Debt	39,400	37,200
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Retail [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	1,600	1,500
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	34,900	31,700
Allowance for Credit Losses	300	300
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	34,600	31,400
Related Debt	28,700	26,600
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Wholesale [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	200	200
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	17,200	17,700
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	17,200	17,700
Related Debt	10,700	10,600
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Net Investment in Operating Leases [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	500	600
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	10,600	12,500
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	10,600	12,500
Related Debt	7,300	8,200
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	500	500
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	10,800	12,700
Allowance for Credit Losses	200	200
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	10,600	12,500
Related Debt	9,200	11,000
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member] | Financing Receivable [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	500	500
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	10,800	12,700
Allowance for Credit Losses	200	200
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	10,600	12,500
Related Debt	9,200	11,000
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member] | Retail [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	500	500
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	10,300	12,200
Allowance for Credit Losses	200	200
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	10,100	12,000
Related Debt	8,900	10,700
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	500	500
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	500	500
Related Debt	300	300
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