Leases - Lessor Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Lessee, Lease, Description [Line Items]
Sales-type and direct financing leases income	$ 300	$ 243	$ 243
Operating lease, lease income	46	63	75
Lease income	$ 346	$ 306	$ 318
Lending and deposit services
Lessee, Lease, Description [Line Items]
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Total noninterest income	Total noninterest income	Total noninterest income