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Stockholders' Equity - (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	600,000		600,000
Equity-based compensation expense	$ 0.6	$ (0.9)	$ 4.1	$ 7.2
Payment, Tax Withholding, Share-based Payment Arrangement	0.0	0.1	2.3	4.1
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	10.8		10.8
Share-based Payment Arrangement, Expense, Tax Benefit	0.0	(0.5)	0.2	0.8
Proceeds from Stock Options Exercised	0.0	0.2	0.0	1.3
Cost of Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax	$ 0.6	0.6	$ 2.0	1.7
Continuing Operations
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense		1.3		6.0
Discontinued Operations
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense		$ 0.4		$ 1.2
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based awards granted			198,887
Grant-date fair value of awards per share			$ 28.36
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based awards granted			194,378
Grant-date fair value of awards per share			$ 31.04