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Employee Benefit Plans and Other Postretirement Plans - Schedule of Estimated Benefit Payments (Details)
$ in Millions
Dec. 31, 2016
USD ($)
Pension Plans  
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]  
2017 $ 41.1
2018 45.0
2019 48.9
2020 52.6
2021 56.2
2021 - 2025 327.7
Postretirement Plans  
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]  
2017 1.2
2018 1.3
2019 1.3
2020 1.4
2021 1.3
2021 - 2025 $ 6.1