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Condensed Consolidated Statements of Cash Flows (Parentheticals) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Statement of Cash Flows [Abstract]    
Asset retirement obligation $ 1.0  
Cash paid for interest, net of capitalized interest 14.9 $ 25.1
Income taxes paid, net of refunds 11.4 24.5
Non-cash additions to property, plant and equipment $ 15.6 $ 8.7