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Revenue - disaggregation of sales - Schedule of Disaggregates of Net Sales of our Component Products and Real Estate Management and Development Segments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue - disaggregation of sales
Net sales	$ 503.5	$ 533.6	$ 1,582.5	$ 1,623.9
Component products
Revenue - disaggregation of sales
Net sales	40.0	33.6	120.6	107.5
Component products | Security Products
Revenue - disaggregation of sales
Net sales	30.3	26.6	91.2	84.7
Component products | Marine Components
Revenue - disaggregation of sales
Net sales	$ 9.7	$ 7.0	$ 29.4	$ 22.8

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