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Employee Benefit Arrangements - Expected Future Contributions and Benefit Payments (Details) - Pension Plan
$ in Millions
Dec. 31, 2024
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
2025 $ 135
2026 136
2027 139
2030-2034 775
Estimated future employer contributions next year 28
2028 143
2029 $ 146