Commitments And Contingencies (Details) $ in Millions					1 Months Ended	3 Months Ended
	Mar. 31, 2016 USD ($) company mi	Mar. 04, 2016 USD ($) mi	Mar. 13, 2013 company mi	Feb. 28, 2011	Mar. 31, 2015 entity party	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
Schedule of Equity Method Investments [Line Items]
Accrued probable future environmental expenditures	$ 119.8					$ 119.8		$ 119.9
Sunbelt
Schedule of Equity Method Investments [Line Items]
Equity interest sold, percentage				50.00%
Guarantee assumed by acquirer	$ 12.2					12.2
Cost of Sales
Schedule of Equity Method Investments [Line Items]
Expense related to environmental activities						$ 1.7	$ 1.5
Proceeds from insurance recoveries							$ 0.5
Contamination of Passaic River Study Area
Schedule of Equity Method Investments [Line Items]
Approximate number of other companies assuming responsibility | company			70
Number of other potentially responsible parties that submitted a de minimis settlement petition | party					9
Contamination of Passaic River Study Area | Lower Passaic River
Schedule of Equity Method Investments [Line Items]
Length of portion of river | mi	8	8	17
Number of entities contributing little or no impact to lower passaic river | entity					10
Total estimated cost of remedy		$ 1,400.0
Number of companies receiving Notice of Potential Liability (more than) | company	100