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Goodwill and Identifiable Intangible Assets - Changes in the Carry Value of Goodwill by Segment (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 28, 2024
Dec. 30, 2023
Goodwill [Line Items]    
Beginning Balance [1] $ 1,906.8 $ 1,640.7
Foreign currency translation adjustments and other (6.5) 8.5
Acquisition-related adjustments 91.7 257.6
Ending Balance [1] 1,992.0 1,906.8
Water [Member]    
Goodwill [Line Items]    
Beginning Balance [1] 1,129.3 893.4
Foreign currency translation adjustments and other (5.3) 8.1
Acquisition-related adjustments 87.2 227.8
Ending Balance [1] 1,211.2 1,129.3
Outdoors [Member]    
Goodwill [Line Items]    
Beginning Balance [1] 651.1 651.0
Foreign currency translation adjustments and other 0.0 0.0
Acquisition-related adjustments 0.0 0.1
Ending Balance [1] 651.1 651.1
Security [Member]    
Goodwill [Line Items]    
Beginning Balance [1] 126.4 96.3
Foreign currency translation adjustments and other (1.2) 0.4
Acquisition-related adjustments 4.5 29.7
Ending Balance [1] $ 129.7 $ 126.4
[1] Net of accumulated impairment losses of $399.5 million in the Outdoors segment.