Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total revenue	$ 2,755	$ 2,348	$ 5,311	$ 4,674
Income before income taxes	381	903	684	1,657
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	555	549	1,114	1,064
Interest expense	1,530	657	2,922	1,268
Financing Receivable, Credit Loss, Expense (Reversal)	40	(56)	117	(120)
Provision for credit losses	40	(56)	117	(120)
Net finance receivables and net investment in operating leases	126,074	115,627	126,074	115,627
Total assets	143,790	128,250	143,790	128,250	$ 138,576
Reportable segments
Segment Reporting Information [Line Items]
Total revenue	2,755	2,348	5,311	4,674
Income before income taxes	411	778	784	1,456
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	555	549	1,114	1,064
Interest expense	1,477	742	2,853	1,396
Financing Receivable, Credit Loss, Expense (Reversal)	40	(56)	117	(120)
Net finance receivables and net investment in operating leases	126,074	115,627	126,074	115,627
Total assets	143,790	128,250	143,790	128,250
Reportable segments | All Other
Other disclosures [Abstract]
Net finance receivables and net investment in operating leases	4,902	5,124	4,902	5,124
Total assets	5,431	5,803	5,431	5,803
Reportable segments | United States and Canada
Other disclosures [Abstract]
Net finance receivables and net investment in operating leases	100,626	94,291	100,626	94,291
Total assets	114,114	103,289	114,114	103,289
Reportable segments | Europe
Other disclosures [Abstract]
Net finance receivables and net investment in operating leases	20,546	16,212	20,546	16,212
Total assets	24,245	19,158	24,245	19,158
Reportable segments | United States and Canada
Segment Reporting Information [Line Items]
Total revenue	2,305	2,029	4,475	4,058
Income before income taxes	271	680	544	1,446
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	551	559	1,108	1,085
Interest expense	1,258	648	2,453	1,206
Financing Receivable, Credit Loss, Expense (Reversal)	36	(57)	99	(124)
Reportable segments | Europe
Segment Reporting Information [Line Items]
Total revenue	344	221	628	416
Income before income taxes	113	106	191	182
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	4	(10)	6	(21)
Interest expense	162	48	292	96
Financing Receivable, Credit Loss, Expense (Reversal)	(2)	(2)	2	(5)
Reportable segments | All Other
Segment Reporting Information [Line Items]
Total revenue	106	98	208	200
Income before income taxes	27	(8)	49	(172)
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	57	46	108	94
Financing Receivable, Credit Loss, Expense (Reversal)	6	3	16	9
Unallocated other
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Income before income taxes	(30)	125	(100)	201
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	53	(85)	69	(128)
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