Commitments and Contingencies (Schedule Of Settlement And Defense Costs) (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Loss Contingencies [Line Items]
Pre-tax cash payments, net	$ 7.5	$ 10.8
Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Settlement / indemnity costs incurred	10.5	5.5	$ 40.6
Defense costs incurred	2.5	3.6	14.6
Total costs incurred	13.0	9.1	55.2
Settlement / indemnity payments	9.6	10.1	42.6
Defense payments	2.1	3.2	15.4
Insurance receipts	(4.2)	(2.5)	(13.1)
Pre-tax cash payments, net	$ 7.5	$ 10.8	$ 44.9