Commitments And Contingencies - Schedule Of Changes In Environmental Accrued Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of the year	$ 117.3	$ 119.9	$ 121.1
Environmental expenses	14.8	8.3	9.3
Net cash payments	(15.2)	(11.0)	(9.8)
Currency translation and other	0.2	0.1	(0.7)
Balance at end of year	$ 117.1	$ 117.3	$ 119.9