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Other Comprehensive (Loss) Earnings - Componets of AOCI (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent $ (5.9) $ (72.9) $ (82.3)
Components of AOCI [Abstract]      
Beginning balance (126.2) (53.3)  
Ending balance (132.1) (126.2) (53.3)
Cash flow hedges      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent (1.6) (1.4)  
Components of AOCI [Abstract]      
Beginning balance (1.6) (0.2)  
Ending balance (3.2) (1.6) (0.2)
Employee benefit plans      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent (5.1) 0.2  
Components of AOCI [Abstract]      
Beginning balance (11.5) (11.7)  
Ending balance (16.6) (11.5) (11.7)
Cumulative foreign currency translation adjustments      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 0.8 (71.7)  
Components of AOCI [Abstract]      
Beginning balance (113.1) (41.4)  
Ending balance $ (112.3) $ (113.1) $ (41.4)