Commitments And Contingencies (Schedule Of Settlement And Defense Costs) (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Loss Contingencies [Line Items]
Pre-tax cash payments	$ 14.7	$ 10.8
Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Settlement / indemnity costs incurred (1)	18.5	11.3	$ 30.5
Defense costs incurred (1)	9.4	10.0	43.0
Gross Settlement And Defense Incurred Costs	28.0	21.3	73.5
Settlement / indemnity payments	14.1	5.1	32.4
Defense payments	7.9	8.6	43.7
Insurance receipts	(7.3)	(2.9)	(20.1)
Pre-tax cash payments	$ 14.7	$ 10.8	$ 56.0