Operating Lease Equipment - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease equipment	$ 319	$ 459
Accumulated depreciation	333	355
Operating lease income	$ 100	$ 135	$ 146
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Commercial banking revenue	Commercial banking revenue	Commercial banking revenue
Depreciation expense	$ 81	$ 110	$ 121
Operating lease payments received	101	140	147
Impairment losses of operating lease equipment	$ 0	$ 0	$ 2