Segment Reporting and Geographic Information - Operations Reporting by Assets (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Finance receivables	$ 90,045	$ 93,510
Leased vehicles, net	33,686	31,586	$ 30,600
Assets from reportable segments	140,272	140,897
Total assets	140,477	141,030
Other Operating Segment
Segment Reporting Information [Line Items]
Other assets	205	134
North America
Segment Reporting Information [Line Items]
Finance receivables	82,219	87,084
Leased vehicles, net	33,158	31,236
Assets from reportable segments	129,261	131,643
International
Segment Reporting Information [Line Items]
Finance receivables	7,826	6,426
Leased vehicles, net	529	350
Assets from reportable segments	$ 11,010	$ 9,254