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Benefit Plans, Estimated Future Benefit Payments (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Pension Benefits [Member]  
Estimated future benefit payments [Abstract]  
2020 $ 25.0
2021 25.3
2022 27.0
2023 27.2
2024 27.0
2025-2029 134.1
Post-Retirement Benefits [Member]  
Estimated future benefit payments [Abstract]  
2020 0.4
2021 0.4
2022 0.4
2023 0.5
2024 0.5
2025-2029 $ 2.3