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Acquisitions - Pro Forma Information (Details) - ASP Henry Holdings, Inc. - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Acquisitions    
Revenues $ 1,324.3 $ 2,378.9
Income from continuing operations 100.5 150.0
Depreciation and amortization $ 14.4 $ 28.8