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Employee Benefit Arrangements - Pension, Other Postretirement Benefit Plans and Other Benefit Plans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items] |  |  |
Annual credit earned by participants, percentage of eligible compensation | 4.00% |  |
Deferred compensation commitment | $ 343 | $ 330 |
Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Projected benefit obligation | 1,989 | 1,912 | $ 1,999
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | 63 | (1) | 23
Other Postretirement Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Projected benefit obligation | 6 | 8 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | $ 1 | $ 1 | $ 1

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