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Derivatives - Derivatives Associated with Fixed Income Trading Activities (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Customer interest rate contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Notional | $ 4,264 | $ 4,096
Assets | 24 | 8
Liabilities | 122 | 190
Offsetting upstream interest rate contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Notional | 4,442 | 4,265
Assets | 84 | 134
Liabilities | 24 | 9
Forwards and futures purchased |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Notional | 1,660 | 1,421
Assets | 10 | 1
Liabilities | 0 | 6
Forwards and futures sold |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Notional | 1,753 | 1,426
Assets | 0 | 7
Liabilities | $ 11 | $ 0

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