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Goodwill and Identifiable Intangible Assets - Change in Net Carrying Amount of Goodwill by Segment (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 30, 2023
Dec. 31, 2022
Goodwill [Line Items]    
Beginning Balance [1] $ 1,640.7 $ 1,538.9
Translation adjustments 8.5 (10.2)
Acquisition-related adjustments 257.6 112.0
Ending Balance [1] 1,906.8 1,640.7
Water [Member]    
Goodwill [Line Items]    
Beginning Balance [1] 893.4 814.1
Translation adjustments 8.1 (9.4)
Acquisition-related adjustments 227.8 88.7
Ending Balance [1] 1,129.3 893.4
Outdoors [Member]    
Goodwill [Line Items]    
Beginning Balance [1] 651.0 627.7
Translation adjustments 0.0 0.0
Acquisition-related adjustments 0.1 23.3
Ending Balance [1] 651.1 651.0
Security [Member]    
Goodwill [Line Items]    
Beginning Balance [1] 96.3 97.1
Translation adjustments 0.4 (0.8)
Acquisition-related adjustments 29.7 0.0
Ending Balance [1] $ 126.4 $ 96.3
[1] Net of accumulated impairment losses of $399.5 million in the Outdoors segment.