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Condensed Consolidated Statements of Cash Flows (Parentheticals) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Statement of Cash Flows [Abstract]    
Cash paid for interest, net of capitalized interest $ 44.7 $ 39.2
Income taxes paid, net of refunds 13.9 37.7
Net interest payments allocated to discontinued operations 10.4 9.4
Tax payments, net of refunds, allocated to discontinued operations 7.9 5.9
Non-cash additions to property, plant and equipment $ 4.1 $ 24.3