Transfers of Receivables - Assets and Liabilities of Securitizations (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024
Securitization Transactions [Line Items]
Cash and cash equivalents	$ 8,469	$ 9,272
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	143,723		$ 137,721
Related Debt	137,394	137,868
Total assets	158,742	158,292	$ 150,627
Consolidated Entities [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,800	3,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	77,300	85,300
Allowance for Credit Losses	(400)	(400)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	76,900	84,900
Related Debt	55,700	60,400
Consolidated Entities [Member] | Securitization Transactions [Member] | Financing Receivable [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,200	2,500
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	64,900	72,000
Allowance for Credit Losses	(400)	(400)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	64,500	71,600
Related Debt	47,800	51,900
Consolidated Entities [Member] | Securitization Transactions [Member] | Retail [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,000	2,200
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	43,000	47,600
Allowance for Credit Losses	(400)	(400)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	42,600	47,200
Related Debt	36,300	40,900
Consolidated Entities [Member] | Securitization Transactions [Member] | Wholesale [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	200	300
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	21,900	24,400
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	21,900	24,400
Related Debt	11,500	11,000
Consolidated Entities [Member] | Securitization Transactions [Member] | Net Investment in Operating Leases [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	600	500
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	12,400	13,300
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	12,400	13,300
Related Debt	7,900	8,500
Variable Interest Entity, Primary Beneficiary [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,364	2,494
Related Debt	47,620	50,855
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	2,400	2,500
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	68,300	74,300
Allowance for Credit Losses	(300)	(300)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	68,000	74,000
Related Debt	47,600	50,900
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Financing Receivable [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	1,800	2,000
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	55,900	61,000
Allowance for Credit Losses	(300)	(300)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	55,600	60,700
Related Debt	39,700	42,400
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	34,400	37,000
Allowance for Credit Losses	(300)	(300)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	34,100	36,700
Related Debt	28,500	31,600
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Wholesale [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	200	300
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	21,500	24,000
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	21,500	24,000
Related Debt	11,200	10,800
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member] | Net Investment in Operating Leases [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	600	500
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	12,400	13,300
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	12,400	13,300
Related Debt	7,900	8,500
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	400	500
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	9,000	11,000
Allowance for Credit Losses	(100)	(100)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	8,900	10,900
Related Debt	8,100	9,500
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member] | Financing Receivable [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	400	500
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	9,000	11,000
Allowance for Credit Losses	(100)	(100)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	8,900	10,900
Related Debt	8,100	9,500
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Securitization Transactions [Member] | Retail [Member]
Securitization Transactions [Line Items]
Cash and cash equivalents	400	500
Finance Receivables and Net Investment in Operating Leases, Before Allowance for Credit Losses	8,600	10,600
Allowance for Credit Losses	(100)	(100)
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	8,500	10,500
Related Debt	7,800	9,300
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	400	400
Allowance for Credit Losses	0	0
Finance Receivables and Net Investment In Operating Leases, After Allowance for Credit Losses	400	400
Related Debt	300	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