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Income Taxes - Schedule Of Provision For Income Taxes (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
Current income taxes, Federal $ 34.2 $ 82.0 $ 89.5
Current income taxes, State 21.5 26.5 21.1
Current income taxes, Foreign 26.9 18.0 9.9
Current income taxes 82.6 126.5 120.5
Deferred income taxes, Federal 23.8 8.5 (4.1)
Deferred income taxes, State 1.6 3.2 (0.3)
Deferred income taxes, Foreign 32.2 (17.8) 38.4
Deferred income taxes 57.6 (6.1) 34.0
Total income tax expense $ 140.2 $ 120.4 $ 154.5