Segment Reporting - Schedule of Operations Reporting by Assets (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Segment Reporting Information [Line Items]
Finance receivables, net	$ 91,313	$ 93,510
Leased vehicles, net	32,239	31,586
Assets from reportable segments	142,682	140,897
Total assets	142,853	141,030
Other Operating Segment
Segment Reporting Information [Line Items]
Other assets	172	134
North America
Segment Reporting Information [Line Items]
Finance receivables, net	84,779	87,084
Leased vehicles, net	31,861	31,236
Assets from reportable segments	133,310	131,643
International
Segment Reporting Information [Line Items]
Finance receivables, net	6,534	6,426
Leased vehicles, net	379	350
Assets from reportable segments	$ 9,372	$ 9,254