Transfers of Receivables - Assets and Liabilities of Securitizations (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Securitization Transactions [Line Items]
Cash and cash equivalents	$ 7,448	$ 10,658
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	137,721		$ 126,074
Related Debt	130,495	129,287
Total assets	150,627	149,205	$ 143,790
Consolidated Entities [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,700	2,700
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	80,200	78,500
Allowance for Credit Losses	(400)	(500)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	79,800	78,000
Related Debt	53,900	58,000
Consolidated Entities [Member] | Securitization Transactions [Member] | Financing Receivable [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,200	2,200
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	67,800	67,300
Allowance for Credit Losses	(400)	(500)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	67,400	66,800
Related Debt	45,700	50,500
Consolidated Entities [Member] | Securitization Transactions [Member] | Retail [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,000	2,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	45,100	46,000
Allowance for Credit Losses	(400)	(500)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	44,700	45,500
Related Debt	37,700	38,500
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	22,700	21,300
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	22,700	21,300
Related Debt	8,000	12,000
Consolidated Entities [Member] | Securitization Transactions [Member] | Net Investment in Operating Leases [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	500	500
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	12,400	11,200
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	12,400	11,200
Related Debt	8,200	7,500
Variable Interest Entity, Primary Beneficiary [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,311	2,298
Related Debt	45,152	48,177
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	69,900	67,700
Allowance for Credit Losses	(300)	(400)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	69,600	67,300
Related Debt	45,200	48,200
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Financing Receivable [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	1,800	1,800
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	57,500	56,500
Allowance for Credit Losses	(300)	(400)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	57,200	56,100
Related Debt	37,000	40,700
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Retail [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	1,600	1,600
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	35,300	35,700
Allowance for Credit Losses	(300)	(400)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	35,000	35,300
Related Debt	29,200	29,100
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	22,200	20,800
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	22,200	20,800
Related Debt	7,800	11,600
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Net Investment in Operating Leases [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	500	500
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	12,400	11,200
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	12,400	11,200
Related Debt	8,200	7,500
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	10,300	10,800
Allowance for Credit Losses	(100)	(100)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	10,200	10,700
Related Debt	8,700	9,800
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	10,300	10,800
Allowance for Credit Losses	(100)	(100)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	10,200	10,700
Related Debt	8,700	9,800
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	9,800	10,300
Allowance for Credit Losses	(100)	(100)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	9,700	10,200
Related Debt	8,500	9,400
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	200	400
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