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Other Charges, Net - Components (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Other Charges, Net    
Information technology transformation costs $ 0.9 $ 1.5
Restructuring charges 1.1 3.3
Acquisition-related charges 3.8 1.0
Other 0.5 2.0
Other charges, net $ 6.3 $ 7.8