Quarterly report pursuant to Section 13 or 15(d)

Plant Closure Expenses - Schedule of Closure-Related Expenses (Details)

v3.10.0.1
Plant Closure Expenses - Schedule of Closure-Related Expenses (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]        
Cash expenses $ 0.4 $ 2.7 $ 1.9 $ 2.7
Restructuring Costs 0.0 21.0 0.0 21.0
Restructuring Charges 0.4 23.7 1.9 23.7
Employee Severance [Member]        
Restructuring Cost and Reserve [Line Items]        
Cash expenses 0.0 1.1 0.0 1.1
Decommissioning costs        
Restructuring Cost and Reserve [Line Items]        
Cash expenses 0.2 1.0 1.2 1.0
Contract termination costs        
Restructuring Cost and Reserve [Line Items]        
Cash expenses 0.2 0.6 0.7 0.6
Accelerated Depreciation        
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs 0.0 18.7 0.0 18.7
Other Restructuring        
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs $ 0.0 $ 2.3 $ 0.0 $ 2.3