Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income Activity (Details)

v3.7.0.1
Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income Activity (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance     $ 623.5 $ 624.0
Total other comprehensive income (loss) $ 2.6 $ (1.9) 4.9 (7.7)
Ending balance 612.0 605.7 612.0 605.7
Foreign Currency Translation Adjustments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other Comprehensive Income (Loss), Net Transfers From Affiliates       8.6
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance     0.5 0.1
Other comprehensive income (loss) before reclassifications, net of tax     3.4 (6.7)
Amounts reclassified from accumulated other comprehensive income     0.0 0.0
Total other comprehensive income (loss)     3.4 (6.7)
Ending balance 3.9 2.0 3.9 2.0
Derivative Gain (Loss)        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other Comprehensive Income (Loss), Net Transfers From Affiliates       (0.2)
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance     0.5 2.3
Other comprehensive income (loss) before reclassifications, net of tax     (0.9) (1.1)
Amounts reclassified from accumulated other comprehensive income     0.0 (0.8)
Total other comprehensive income (loss)     (0.9) (1.9)
Ending balance (0.4) 0.2 (0.4) 0.2
Pension and Postretirement Adjustments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other Comprehensive Income (Loss), Net Transfers From Affiliates       (62.6)
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance     (60.8) (0.4)
Other comprehensive income (loss) before reclassifications, net of tax     (0.3) (0.1)
Amounts reclassified from accumulated other comprehensive income     2.7 1.0
Total other comprehensive income (loss)     2.4 0.9
Ending balance (58.4) (62.1) (58.4) (62.1)
Total Accumulated Other Comprehensive Income (Loss)        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other Comprehensive Income (Loss), Net Transfers From Affiliates       (54.2)
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance     (59.8) 2.0
Other comprehensive income (loss) before reclassifications, net of tax     2.2 (7.9)
Amounts reclassified from accumulated other comprehensive income     2.7 0.2
Total other comprehensive income (loss)     4.9 (7.7)
Ending balance $ (54.9) $ (59.9) $ (54.9) $ (59.9)