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Pension and Other Postretirement Plans - Estimated Future Benefits Payments (Details)
$ in Millions
Dec. 31, 2023
USD ($)
Pension Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2024 $ 47.6
2025 7.2
2026 7.2
2027 7.2
2028 7.1
Years 2029-2033 33.7
Postretirement Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2024 0.5
2025 0.5
2026 0.4
2027 0.4
2028 0.4
Years 2029-2033 $ 2.5