Equity and Accumulated Other Comprehensive Income (Components Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Stockholders' Equity Note [Abstract]
Common stock authorized, shares	200,000,000
Preferred stock authorized, shares	25,000,000
Statement Equity Components [Line Items]
Accumulated other comprehensive income (loss)	$ (230.8)	$ (286.4)
Company Common Shareholders
Statement Equity Components [Line Items]
Foreign currency translation adjustment	(165.3)	(228.2)
Pension adjustments, net of tax	(65.5)	(58.2)
Accumulated other comprehensive income (loss)	(230.8)	(286.4)
Noncontrolling Interest
Statement Equity Components [Line Items]
Foreign currency translation adjustment	(3.0)	(13.0)
Pension adjustments, net of tax	0.0	(1.3)
Accumulated other comprehensive income (loss)	$ (3.0)	$ (14.3)