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Disaggregation of sales - Schedule of Disaggregates of Net Sales of our Component Products and Real Estate Management and Development Segments (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disaggregation Of Revenue [Line Items]      
Net sales $ 1,921.7 $ 2,222.5 $ 2,296.4
Component products      
Disaggregation Of Revenue [Line Items]      
Net sales 161.3 166.6 140.8
Component products | Security Products      
Disaggregation Of Revenue [Line Items]      
Net sales 121.2 114.5 105.1
Component products | Marine Components      
Disaggregation Of Revenue [Line Items]      
Net sales 40.1 52.1 35.7
Real estate management and development      
Disaggregation Of Revenue [Line Items]      
Net sales 93.9 125.7 216.2
Real estate management and development | Land Sales      
Disaggregation Of Revenue [Line Items]      
Net sales 92.6 120.9 207.8
Real estate management and development | Utility and Other      
Disaggregation Of Revenue [Line Items]      
Net sales $ 1.3 1.2 1.6
Real estate management and development | Water Delivery      
Disaggregation Of Revenue [Line Items]      
Net sales   $ 3.6 $ 6.8