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Goodwill and Identifiable Intangible Assets - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2022
Dec. 31, 2020
Dec. 31, 2021
Goodwill and Identifiable Intangible Assets [Line Items]        
Goodwill [1]   $ 1,640.7 $ 1,468.7 $ 1,538.9
Net identifiable intangible assets   1,000.8   968.1
Increase in gross identifiable intangible assets   78.4    
Impairment of intangible assets, trade names   0.0    
Amount of fair value in excess of carrying amount   $ 111.0    
Percentage of fair value in excess of carrying amount   10.00%    
Expected intangible amortization expense in 2023   $ 50.0    
Expected intangible amortization expense in 2024   50.0    
Expected intangible amortization expense in 2025   50.0    
Expected intangible amortization expense in 2026   49.0    
Expected intangible amortization expense in 2027   47.0    
Gross Carrying Amounts, Indefinite-lived tradenames   478.1   479.2
Tradenames and Customer Relationship [Member]        
Goodwill and Identifiable Intangible Assets [Line Items]        
Net identifiable intangible assets   $ 1,000.8   968.1
Tradenames and Customer Relationship [Member] | Minimum [Member]        
Goodwill and Identifiable Intangible Assets [Line Items]        
Amortizable identifiable intangible assets, estimated useful life   5 years    
Tradenames and Customer Relationship [Member] | Maximum [Member]        
Goodwill and Identifiable Intangible Assets [Line Items]        
Amortizable identifiable intangible assets, estimated useful life   30 years    
Water Innovations [Member]        
Goodwill and Identifiable Intangible Assets [Line Items]        
Goodwill [1]   $ 893.4 $ 750.1 $ 814.1
Water Innovations [Member] | COVID-19 [Member]        
Goodwill and Identifiable Intangible Assets [Line Items]        
Impairment of intangible assets, trade names $ 13.0      
Amortizable identifiable intangible assets, estimated useful life     30 years  
[1] Net of accumulated impairment losses of $399.5 million in the Outdoors & Security segment.