Noninterest Income - Credit Card Fees (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 1,503	$ 1,314	$ 1,057
Revenue not from contracts with customer	225	1,424	783
Total credit card fees	150	131	98
Credit interchange fees, net
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	117	108	76
Merchant service fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	26	18	18
Card service fees
Disaggregation of Revenue [Line Items]
Revenue not from contracts with customer	$ 7	$ 5	$ 4