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Retirement Plans Estimated Future Benefit Payments (Details)
$ in Millions
Dec. 31, 2022
USD ($)
Pension Benefits  
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
2023 $ 50
2024 47
2025 49
2026 50
2027 51
Subsequent five years 241
Other Postretirement Plans  
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
2023 1
2024 1
2025 1
2026 0
2027 0
Subsequent five years $ 2