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Condensed Consolidated Statements of Cash Flows (Parentheticals) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Statement of Cash Flows [Abstract]    
Cash paid for interest, net of capitalized interest $ 98.4 $ 72.7
Income taxes paid, net of refunds 103.3 21.0
Net interest payments allocated to discontinued operations   15.1
Tax payments, net of refunds, allocated to discontinued operations   8.1
Non-cash additions to property, plant and equipment $ 7.2 $ 4.4