Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total revenue	$ 2,828	$ 2,303	$ 8,139	$ 6,977
Income before income taxes	358	589	1,042	2,246
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	576	579	1,690	1,643
Interest expense	1,653	851	4,575	2,119
Financing Receivable, Credit Loss, Expense (Reversal)	74	39	191	(81)
Provision for credit losses	74	39	191	(81)
Net finance receivables and net investment in operating leases	126,327	115,472	126,327	115,472
Total assets	143,551	127,918	143,551	127,918	$ 138,576
Reportable segments
Segment Reporting Information [Line Items]
Total revenue	2,828	2,303	8,139	6,977
Income before income taxes	356	492	1,140	1,948
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	576	579	1,690	1,643
Interest expense	1,604	891	4,457	2,287
Financing Receivable, Credit Loss, Expense (Reversal)	74	39	191	(81)
Net finance receivables and net investment in operating leases	126,327	115,472	126,327	115,472
Total assets	143,551	127,918	143,551	127,918
Reportable segments | All Other
Other disclosures [Abstract]
Net finance receivables and net investment in operating leases	5,112	5,088	5,112	5,088
Total assets	5,665	5,720	5,665	5,720
Reportable segments | United States and Canada
Other disclosures [Abstract]
Net finance receivables and net investment in operating leases	101,885	93,930	101,885	93,930
Total assets	114,585	102,916	114,585	102,916
Reportable segments | Europe
Other disclosures [Abstract]
Net finance receivables and net investment in operating leases	19,330	16,454	19,330	16,454
Total assets	23,301	19,282	23,301	19,282
Reportable segments | United States and Canada
Segment Reporting Information [Line Items]
Total revenue	2,366	2,015	6,841	6,073
Income before income taxes	257	394	801	1,840
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	568	588	1,676	1,673
Interest expense	1,354	792	3,807	1,998
Financing Receivable, Credit Loss, Expense (Reversal)	71	42	170	(82)
Reportable segments | Europe
Segment Reporting Information [Line Items]
Total revenue	346	188	974	604
Income before income taxes	78	74	269	256
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	8	(9)	14	(30)
Interest expense	185	52	477	148
Financing Receivable, Credit Loss, Expense (Reversal)	4	(12)	6	(17)
Reportable segments | All Other
Segment Reporting Information [Line Items]
Total revenue	116	100	324	300
Income before income taxes	21	24	70	(148)
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	65	47	173	141
Financing Receivable, Credit Loss, Expense (Reversal)	(1)	9	15	18
Unallocated other
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Income before income taxes	2	97	(98)	298
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	49	(40)	118	(168)
Financing Receivable, Credit Loss, Expense (Reversal)	0	0	0	0
Net finance receivables and net investment in operating leases	0	0	0	0
Total assets	$ 0	$ 0	$ 0	$ 0