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Pension and Postretirement Benefits - Expected Benefit Payments (Details)
$ in Millions
Dec. 31, 2023
USD ($)
Pension plans  
Defined Benefit Plan Disclosure [Line Items]  
2024 $ 96.0
2025 98.0
2026 99.4
2027 101.3
2028 102.5
2029 - 2033 506.9
Postretirement benefit obligations  
Defined Benefit Plan Disclosure [Line Items]  
2024 0.2
2025 0.2
2026 0.1
2027 0.1
2028 0.1
2029 - 2033 $ 0.1