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Derivatives - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Collateral cash payables | $ 533 |  | $ 533 |  | $ 489
Total trading revenues | 31 | $ 22 | 75 | $ 49 |
Hedged amount of foreign currency denominated loans | 9 |  | 9 |  | 17
Additional Derivative Agreements | Derivative Instruments With Adjustable Collateral Posting Thresholds |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net fair value of derivative assets with adjustable posting thresholds | 3 |  | 3 |  | 12
Net fair value of derivative liabilities with adjustable posting thresholds | 227 |  | 227 |  | 188
Collateral received | 80 |  | 80 |  | 95
Securities posted collateral | 105 |  | 105 |  | 83
Additional Derivative Agreements | Derivative Instruments With Accelerated Termination Provisions |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net fair value of derivative assets with adjustable posting thresholds | 4 |  | 4 |  | 12
Net fair value of derivative liabilities with adjustable posting thresholds | 227 |  | 227 |  | 188
Collateral received | 81 |  | 81 |  | 95
Securities posted collateral | 105 |  | 105 |  | 83
Credit Risk Contract |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative asset, notional amount | 368 |  | 368 |  | 351
Derivative liability, notional amount | 894 |  | 894 |  | 874
Visa Class B Shares |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative liabilities related to sale | 18 |  | 18 |  | 23
Derivative valuation adjustment |  |  |  |  | 15
Counterparties |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Collateral cash receivables | 648 |  | 648 |  | 406
Collateral cash payables | $ 22 |  | $ 22 |  | $ 33

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