Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Details)

v3.10.0.1
Basis of Presentation (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Other Pension, Postretirement and Supplemental Plans [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Pension and Other Postretirement Benefits Cost (Reversal of Cost) $ 0.0 $ 0.0 $ 0.1 $ 0.1