Commitments and Contingencies (Schedule Of Settlement And Defense Costs) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Loss Contingencies [Line Items]
Pre-tax cash payments, net			$ 23.4	$ 20.2
Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Settlement / indemnity costs incurred	$ 12.6	$ 8.4	23.1	13.9	$ 40.6
Defense costs incurred	2.8	3.8	5.4	7.4	14.6
Total costs incurred	15.4	12.2	28.5	21.3	55.2
Settlement / indemnity payments	17.6	9.4	27.3	19.5	42.6
Defense payments	2.9	4.2	5.0	7.4	15.4
Insurance receipts	(4.6)	(4.2)	(8.8)	(6.7)	(13.1)
Pre-tax cash payments, net	$ 15.9	$ 9.4	$ 23.5	$ 20.2	$ 44.9