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Commitments, Contingencies, Guarantees and Others - Unfunded Lending Commitments: Contractual Amount and Carrying Value (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Loss Contingencies [Line Items] |  |
Total unfunded lending commitments, contractual amount | $ 441,283 | $ 409,314
Off-balance sheet lending commitment, carrying value | 122 | 204
Credit Card: |  |
Loss Contingencies [Line Items] |  |
Unused commitments to extend credit, contractual amount | 392,867 | 359,507
Other loan commitments |  |
Loss Contingencies [Line Items] |  |
Unused commitments to extend credit, contractual amount | 46,951 | 48,405
Off-balance sheet lending commitment, carrying value | 99 | 176
Advised line of credit | 4,700 | 4,400
Letter of credit |  |
Loss Contingencies [Line Items] |  |
Standby letters of credit and commercial letters of credit, contractual amount | 1,465 | 1,402
Off-balance sheet lending commitment, carrying value | $ 23 | $ 28

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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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