Fee Income from Contracts with Customers - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Deferred fee income	$ 8		$ 8		$ 3
Credit card fees, net
Disaggregation of Revenue [Line Items]
Interchange fees	28	$ 27	86	$ 81
Rewards program costs	$ 19	$ 16	$ 56	$ 48