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Acquisitions - Pro Forma Information (Details) - ASP Henry Holdings, Inc. - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Acquisitions |  |  |  |
Revenues | $ 1,415.7 | $ 1,199.6 | $ 3,794.6 | $ 3,331.4
Income from continuing operations | 123.9 | 107.5 | 264.6 | 221.2
Depreciation and amortization | $ 13.6 | $ 20.3 | $ 54.4 | $ 61.1

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