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Commitments, Contingencies, Guarantees and Others - Unfunded Lending Commitments: Contractual Amount and Carrying Value (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
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Loss Contingencies [Line Items] |  |
Total unfunded lending commitments, contractual amount | $ 452,558 | $ 441,283
Off-balance sheet lending commitment, carrying value | 92 | 122
Credit Card: |  |
Loss Contingencies [Line Items] |  |
Credit car lines, contractual amount | 404,968 | 392,867
Other loan commitments |  |
Loss Contingencies [Line Items] |  |
Credit car lines, contractual amount | 46,169 | 46,951
Off-balance sheet lending commitment, carrying value | 67 | 99
Advised line of credit | 4,500 | 4,700
Letter of credit |  |
Loss Contingencies [Line Items] |  |
Standby letters of credit and commercial letters of credit, contractual amount | 1,421 | 1,465
Off-balance sheet lending commitment, carrying value | $ 25 | $ 23

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- Definition The contractual amount of line of credit that drawings are subject to our satisfactory evaluation of the customer and are cancelable upon proper notice. + References No definition available. + Details
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- Definition Letter of credit issued contractual amount and unused commitment to extend credit + References No definition available. + Details
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- Definition The carrying value of off-balance sheet lending-related financial instruments (e.g., commitments and guarantees), which represents the allowance for lending-related commitments, deferred revenue and the guarantee liability. + References No definition available. + Details
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