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Accrued Liabilities (Summary Of Warranty Liabilities) (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure Accrued Liabilities Summary Of Warranty Liabilities [Abstract]    
Balance at beginning of period $ 11.0 $ 18.2
Expense 8.2 8.9
Changes due to acquisitions/divestitures 0.3 0.0
Payments / deductions (10.2) (16.0)
Currency translation 0.1 (0.1)
Balance at end of period 9.4 11.0
Product Warranties Disclosures [Abstract]    
Warranty 11.0 18.2
Expense 8.2 8.9
Changes due to acquisitions/divestitures 0.3 0.0
Standard and Extended Product Warranty Accrual, Decrease for Payments 10.2 16.0
Currency translation $ 0.1 $ (0.1)