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Income Taxes - Consolidated Provision for Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Current:      
Federal $ (9.6) $ (18.2) $ 52.2
State 17.0 (8.8) 28.6
Foreign 47.2 85.7 48.6
Total current 54.6 58.7 129.4
Deferred:      
Federal 20.1 (23.9) 51.3
State 5.4 3.4 13.2
Foreign 1.3 (35.3) (12.6)
Total deferred 26.8 (55.8) 51.9
Income tax expense $ 81.4 $ 2.9 $ 181.3