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Employee Benefit Arrangements - Obligations in Excess of Plan Assets (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | $ 1,819 | $ 1,773 |
Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Projected benefit obligation | 1,989 | 1,912 | $ 1,999
Fair value of plan assets | $ 1,819 | $ 1,773 | $ 1,831

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