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Employee Benefit Plans - Schedule of Future Benefit Payments (Details)
$ in Millions
Sep. 30, 2024
USD ($)
Pension benefits  
Defined Benefit Plan Disclosure [Line Items]  
2023 $ 136.3
2024 135.1
2025 133.1
2026 130.0
2027 128.7
2028 - 2032 592.5
Total 1,255.7
Other postretirement benefits  
Defined Benefit Plan Disclosure [Line Items]  
2023 2.6
2024 2.3
2025 2.1
2026 2.1
2027 2.0
2028 - 2032 8.7
Total $ 19.8