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Derivative Financial Instruments and Off-balance Sheet Financial Instruments - Schedule of OTC Derivatives Counterparty Credit Exposure by Counterparty Credit Rating (Details) $ in Millions | Dec. 31, 2025 USD ($) counter-party | Dec. 31, 2024 USD ($) counter-party
--- | --- | ---
Credit Derivatives |  |
Number of counter-parties | counter-party | 1 | 4
Notional amount | $ 37 | $ 602
Credit exposure | 0 | 20
Exposure, net of collateral | $ 0 | $ 2
AA- |  |
Credit Derivatives |  |
Number of counter-parties | counter-party | 1 | 1
Notional amount | $ 37 | $ 213
Credit exposure | 0 | 10
Exposure, net of collateral | $ 0 | $ 1
A+ |  |
Credit Derivatives |  |
Number of counter-parties | counter-party | 0 | 3
Notional amount | $ 0 | $ 389
Credit exposure | 0 | 10
Exposure, net of collateral | $ 0 | $ 1

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