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Goodwill and Other Intangible Assets (Schedule of Intangible Assets, Excluding Goodwill) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 589.8 $ 489.6
Accumulated Amortization (477.2) (446.2)
Total $ 112.6 $ 43.4
Trademarks, patents, licenses and agreements    
Finite-Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 7 years 7 years
Gross Carrying Amount $ 59.8 $ 24.0
Accumulated Amortization (22.4) (13.5)
Total $ 37.4 $ 10.5
Capitalized software    
Finite-Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 5 years 5 years
Gross Carrying Amount $ 15.3 $ 4.8
Accumulated Amortization (5.1) (4.3)
Total $ 10.2 $ 0.5
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period (Years) 6 years 6 years
Gross Carrying Amount $ 514.7 $ 460.8
Accumulated Amortization (449.7) (428.4)
Total $ 65.0 $ 32.4