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Other Long-Term Liabilities (Schedule of Other Long-Term Liabilities) (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Other Liabilities Disclosure [Abstract]    
Fair value of derivative liabilities $ 24.0 $ 28.4
Acquisition-related contingent consideration 17.1 16.9
Long-term deferred compensation arrangements 15.5 14.8
Environmental insurance recoveries received in excess of cumulative expenses incurred 4.9 5.0
Other 10.9 11.4
Total other long-term liabilities $ 72.4 $ 76.5