Commitments And Contingencies (Schedule Of Settlement And Defense Costs) (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Loss Contingencies [Line Items]
Pre-tax cash payments	$ 10.8	$ 10.7
Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Settlement / indemnity costs incurred (1)	11.3	7.8	$ 27.7
Defense costs incurred (1)	10.0	10.5	41.7
Gross Settlement And Defense Incurred Costs	21.3	18.3	69.4
Settlement / indemnity payments	5.1	5.5	24.5
Defense payments	8.6	8.1	43.5
Insurance receipts	(2.9)	(2.9)	(18.1)
Pre-tax cash payments	$ 10.8	$ 10.7	$ 49.9