Other Long-Term Liabilities (Schedule of Other Long-Term Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Fair value of derivative liabilities	$ 28.4	$ 15.6
Acquisition-related contingent consideration	16.9
Long-term deferred compensation arrangements	14.8	14.0
Environmental insurance recoveries received in excess of cumulative expenses incurred	5.0
Other	11.4	8.2
Total other long-term liabilities	$ 76.5	$ 37.8