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Employee Retirement Plans - Schedule of Expected Benefit Payments under Pension and Postretirement Plans (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Retirement Benefits [Abstract]  
2020 $ 7.2
2021 7.4
2022 7.6
2023 7.8
2024 8.0
Thereafter 43.0
Total $ 81.0