Annual report pursuant to Section 13 and 15(d)

Basis of Presentation Basis of Presentation (Details)

v3.10.0.1
Basis of Presentation Basis of Presentation (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Jan. 01, 2019
Accounting Standards Update 2016-02 [Member] | Forecast [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Operating lease, right-of-use asset   $ 3.0
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) $ 0.1