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Loans - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Accrued interest receivable | $ 2,200 | $ 1,900 |
Financing Receivable, Pledged Status [Extensible Enumeration] | Asset Pledged as Collateral [Member] |  |
Net loans held for investment | $ 305,176 | 299,091 |
Loans held for sale | 854 | 203 |
Commercial and multifamily real estate |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Payments for origination, loan | 4,400 | 8,600 | $ 9,100
Federal Home Loan banks |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Net loans held for investment | 7,400 | 9,800 |
Remaining borrowing capacity | 32,100 | 19,900 |
Federal Reserve Discount Window |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Net loans held for investment | 78,300 | 34,100 |
Remaining borrowing capacity | 41,400 | 19,700 |
Domestic credit card: | Domestic Credit Card and Commercial Banking Portfolios |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Revolving loans converted to term during period | $ 617 | $ 441 |

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