Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total revenue	$ 3,283	$ 2,755	$ 6,389	$ 5,311
Income before income taxes	343	381	669	684
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	613	555	1,223	1,114
Interest expense	1,897	1,530	3,745	2,922
Financing Receivable, Credit Loss, Expense (Reversal)	95	40	183	117
Provision for credit losses	95	40	183	117
Net finance receivables and net investment in operating leases	137,721	126,074	137,721	126,074
Total assets	150,627	143,790	150,627	143,790	$ 149,205
Reportable segments
Segment Reporting Information [Line Items]
Total revenue	3,283	2,755	6,389	5,311
Income before income taxes	396	411	751	784
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	613	555	1,223	1,114
Interest expense	1,801	1,477	3,551	2,853
Financing Receivable, Credit Loss, Expense (Reversal)	95	40	183	117
Net finance receivables and net investment in operating leases	137,721	126,074	137,721	126,074
Total assets	150,627	143,790	150,627	143,790
Reportable segments | All Other
Other disclosures [Abstract]
Net finance receivables and net investment in operating leases	4,569	4,902	4,569	4,902
Total assets	5,141	5,431	5,141	5,431
Reportable segments | United States and Canada
Other disclosures [Abstract]
Net finance receivables and net investment in operating leases	113,727	100,626	113,727	100,626
Total assets	122,702	114,114	122,702	114,114
Reportable segments | Europe
Other disclosures [Abstract]
Net finance receivables and net investment in operating leases	19,425	20,546	19,425	20,546
Total assets	22,784	24,245	22,784	24,245
Reportable segments | United States and Canada
Segment Reporting Information [Line Items]
Total revenue	2,785	2,305	5,401	4,475
Income before income taxes	298	271	561	544
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	606	551	1,209	1,108
Interest expense	1,519	1,258	2,979	2,453
Financing Receivable, Credit Loss, Expense (Reversal)	70	36	140	99
Reportable segments | Europe
Segment Reporting Information [Line Items]
Total revenue	381	344	752	628
Income before income taxes	88	113	160	191
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	7	4	14	6
Interest expense	216	162	437	292
Financing Receivable, Credit Loss, Expense (Reversal)	5	(2)	12	2
Reportable segments | All Other
Segment Reporting Information [Line Items]
Total revenue	117	106	236	208
Income before income taxes	10	27	30	49
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	66	57	135	108
Financing Receivable, Credit Loss, Expense (Reversal)	20	6	31	16
Unallocated other
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Income before income taxes	(53)	(30)	(82)	(100)
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	96	53	194	69
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