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Stockholders' Equity - (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 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	$ 2.5	$ 4.7	$ 3.5	$ 8.1
Payment, Tax Withholding, Share-based Payment Arrangement	0.0	0.8	2.3	3.9
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	12.3		12.3
Share-based Payment Arrangement, Expense, Tax Benefit	0.5	1.0	0.2	1.3
Proceeds from Stock Options Exercised	0.0	1.1	0.0	1.1
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	$ 0.7	0.5	$ 1.3	1.0
Continuing Operations
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense		4.3		7.3
Discontinued Operations
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense		$ 0.4		$ 0.8
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based awards granted			196,128
Grant-date fair value of awards per share			$ 28.35
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based awards granted			190,914
Grant-date fair value of awards per share			$ 31.02