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Fee Income from Contracts with Customers - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Disaggregation of Revenue [Line Items]      
Deferred fee income $ 4   $ 4
Credit card fees, net      
Disaggregation of Revenue [Line Items]      
Interchange fees 25 $ 18  
Rewards program costs $ 15 $ 11