Derivative Instruments and Hedging Activities - Schedule of Statement of Gains and Losses on Derivative Instruments Reported in Statement of Comprehensive Income (Details) - Total derivatives not designated as accounting hedges - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain recognized in earnings	$ (2)	$ 8	$ (1)	$ 14
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain recognized in earnings	0	5	1	10
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain recognized in earnings	(2)	1	(2)	2
Equity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain recognized in earnings	0	2	0	2
Gain on mortgage and automotive loans, net | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain recognized in earnings	0	5	1	10
Other operating expenses | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain recognized in earnings	(2)	1	(2)	2
Other income, net of losses | Equity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain recognized in earnings	$ 0	$ 2	$ 0	$ 2