Commitments And Contingencies (Schedule Of Settlement And Defense Costs) (Detail) (USD $)	3 Months Ended				6 Months Ended				12 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011		Dec. 31, 2011
Loss Contingencies [Line Items]
Pre-tax cash payments					$ 39,217,000		$ 35,621,000
Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Settlement / indemnity costs incurred (1)	10,400,000	[1]	13,900,000	[1]	20,900,000	[1]	30,100,000	[1]	50,200,000	[1]
Defense costs incurred (1)	15,700,000	[1]	14,700,000	[1]	28,800,000	[1]	26,100,000	[1]	55,300,000	[1]
Total costs incurred	26,100,000		28,600,000		49,700,000		56,200,000		105,500,000
Settlement / indemnity payments	8,600,000		13,000,000		18,000,000		21,500,000		55,000,000
Defense payments	15,200,000		16,700,000		28,000,000		27,400,000		56,500,000
Insurance receipts	(2,800,000)		(6,800,000)		(6,800,000)		(13,300,000)		(32,200,000)
Pre-tax cash payments	$ 21,000,000		$ 22,900,000		$ 39,200,000		$ 35,600,000		$ 79,300,000

[1] Before insurance recoveries and tax effects.