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Restructuring, Impairment and Transaction-Related Charges (Schedule of Restructuring, Impairment and Transaction-Related Charges) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Restructuring and Related Activities [Abstract]    
Employee termination charges $ 2.9 $ 4.9
Impairment charges 0.4 16.7
Transaction-related charges 0.8 0.6
Integration costs 0.0 0.1
Other restructuring charges 5.1 6.6
Total $ 9.2 $ 28.9