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Accounts Payable And Accrued Expenses (Details) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Payables And Accruals [Abstract]    
Payables, trade and other $ 71.6 $ 67.6
Employment costs 14.5 18.0
Current portion of pension and postretirement liabilities 11.6 11.6
Other 6.1 11.2
Total accounts payable and accrued expenses $ 103.8 $ 108.4