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Derivative Financial Instruments - Gross Positions without Impact of Master Netting Agreements (Detail) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
Derivative assets | $ 47 | $ 25
Impact of master netting agreements, Assets | 0 | 0
Derivative values with impact of master netting agreements (as carried on balance sheet), Assets | $ 47 | $ 25
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Other assets | Other assets
Cash collateral (held) pledged, Assets | $ (46) | $ (26)
Net position, Assets | 1 | (1)
Derivative liabilities | (79) | (244)
Impact of master netting agreements, Liabilities | 0 | 0
Derivative values with impact of master netting agreements (as carried on balance sheet), Liabilities | $ (79) | $ (244)
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Other liabilities | Other liabilities
Cash collateral (held) pledged, Liabilities | $ 39 | $ 30
Net position, Liabilities | $ (40) | $ (214)

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