XML 112 R89.htm IDEA: XBRL DOCUMENT v3.8.0.1
Pension Plans and Other Benefits - Est Future Defined Benefit Pension Plan Pmts (Details)
$ in Millions
Dec. 31, 2017
USD ($)
Pension Plans Benefit Payments  
Defined Benefit Plan Disclosure  
2018 $ 41.9
2019 42.9
2020 43.5
2021 44.3
2022 45.2
2023-2027 226.6
Other Postretirement Plans Benefit Payments  
Defined Benefit Plan Disclosure  
2018 4.2
2019 4.0
2020 3.7
2021 3.4
2022 3.1
2023-2027 12.3
Medicare Part D Adjustments  
Defined Benefit Plan Disclosure  
2018 0.3
2019 0.3
2020 0.2
2021 0.2
2022 0.2
2023-2027 $ 0.7