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Commitments and Contingencies (Schedule Of Settlement And Defense Costs) (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Loss Contingencies [Line Items]    
Pre-tax cash payments, net $ 0.0 $ 7.5
Asbestos Commitments and Contingencies    
Loss Contingencies [Line Items]    
Settlement / indemnity costs incurred 0.0 10.5
Defense costs incurred 0.0 2.5
Total costs incurred 0.0 13.0
Settlement / indemnity payments 0.0 9.6
Defense payments 0.0 2.1
Insurance receipts 0.0 (4.2)
Pre-tax cash payments, net $ 0.0 $ 7.5