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Employee Benefit Plans - Schedule of Future Benefit Payments (Details)
$ in Millions
Sep. 30, 2023
USD ($)
Pension benefits  
Defined Benefit Plan Disclosure [Line Items]  
2023 $ 139.5
2024 137.8
2025 135.6
2026 133.3
2027 129.5
2028 - 2032 600.0
Total 1,275.7
Other postretirement benefits  
Defined Benefit Plan Disclosure [Line Items]  
2023 2.7
2024 2.4
2025 2.2
2026 2.0
2027 1.9
2028 - 2032 8.7
Total $ 19.9