Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total revenue	$ 3,106	$ 2,556
Income before income taxes	326	303
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	610	559
Interest expense	1,848	1,392
Financing Receivable, Credit Loss, Expense (Reversal)	88	77
Provision for credit losses	88	77
Net finance receivables and net investment in operating leases	135,474	123,827
Total assets	149,709	138,932	$ 149,205
Reportable segments
Segment Reporting Information [Line Items]
Total revenue	3,106	2,556
Income before income taxes	355	373
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	610	559
Interest expense	1,750	1,376
Financing Receivable, Credit Loss, Expense (Reversal)	88	77
Net finance receivables and net investment in operating leases	135,474	123,827
Total assets	149,709	138,932
Reportable segments | All Other
Other disclosures [Abstract]
Net finance receivables and net investment in operating leases	4,819	4,943
Total assets	5,350	5,622
Reportable segments | United States and Canada
Other disclosures [Abstract]
Net finance receivables and net investment in operating leases	110,674	98,659
Total assets	120,368	109,955
Reportable segments | Europe
Other disclosures [Abstract]
Net finance receivables and net investment in operating leases	19,981	20,225
Total assets	23,991	23,355
Reportable segments | United States and Canada
Segment Reporting Information [Line Items]
Total revenue	2,616	2,170
Income before income taxes	263	273
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	603	557
Interest expense	1,460	1,195
Financing Receivable, Credit Loss, Expense (Reversal)	70	63
Reportable segments | Europe
Segment Reporting Information [Line Items]
Total revenue	371	284
Income before income taxes	72	78
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	7	2
Interest expense	221	130
Financing Receivable, Credit Loss, Expense (Reversal)	7	4
Reportable segments | All Other
Segment Reporting Information [Line Items]
Total revenue	119	102
Income before income taxes	20	22
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0
Interest expense	69	51
Financing Receivable, Credit Loss, Expense (Reversal)	11	10
Unallocated other
Segment Reporting Information [Line Items]
Total revenue	0	0
Income before income taxes	(29)	(70)
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0
Interest expense	98	16
Financing Receivable, Credit Loss, Expense (Reversal)	0	0
Net finance receivables and net investment in operating leases	0	0
Total assets	$ 0	$ 0