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Income Taxes - Summary of Income Tax (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Current      
Federal $ 94.9 $ 93.5 $ 133.1
Foreign 35.1 26.4 22.4
State and other 21.5 24.1 22.8
Deferred      
Federal, state and other (4.4) 4.8 (27.2)
Foreign (3.1) (1.8) 8.4
Income tax expense as reported $ 144.0 $ 147.0 $ 159.5