Accounts Payable And Accrued Expenses (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Payables And Accruals [Abstract]
Payables, trade and other	$ 67.6	$ 68.7
Employment costs	18.0	16.3
Current portion of pension and postretirement benefit liabilities	11.6	12.2
Contingent liability related to discontinued operations		11.9
Other	11.2	7.9
Total accounts payable and accrued expenses	$ 108.4	$ 117.0