Commitments And Contingencies (Details) $ in Millions			1 Months Ended	6 Months Ended
	Mar. 13, 2013 company	Feb. 28, 2011 USD ($)	Mar. 31, 2015 entity party	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Schedule of Equity Method Investments [Line Items]
Companies | company	71
Number of potentially responsible parties | party			10
Number of entities contributing little or no impact to lower passaic river | entity			10
Expense related to environmental activities				$ 3.5	$ 1.8
Proceeds from insurance recoveries				0.5
Accrued probable future environmental expenditures				119.4		$ 121.1
Sunbelt [Member]
Schedule of Equity Method Investments [Line Items]
Equity interest sold, percentage		50.00%
Consideration received on transaction		$ 132.3
Guarantee assumed By acquirer				$ 18.3