Loans - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest receivable	$ 1,900	$ 1,200
TDRs	2,700	1,600
Commitments to lend on loans modified in TDRs	$ 219	168
Financing Receivable, Pledged Status [Extensible Enumeration]	Asset Pledged as Collateral [Member]
Net loans held for investment	$ 299,091	265,910
Loans held for sale	203	5,888
Commercial and multifamily real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Payments for Origination of Mortgage Loans Held-for-sale	8,600	9,100	$ 10,000
Federal Home Loan banks
Financing Receivable, Allowance for Credit Loss [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	19,900	19,700
Net loans held for investment	9,800	10,300
Federal Reserve Discount Window
Financing Receivable, Allowance for Credit Loss [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	19,700	19,600
Net loans held for investment	34,100	26,500
Credit Card and Consumer Banking | Performing
Financing Receivable, Allowance for Credit Loss [Line Items]
TDRs	1,500	1,100
Commercial Banking | Performing
Financing Receivable, Allowance for Credit Loss [Line Items]
TDRs	595	192
Domestic credit card: | Domestic Credit Card and Commercial Banking Portfolios [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Revolving loans converted to term during period	$ 441	$ 223