Restructuring Activities - Schedule of Costs Related to the Optimization Program (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 0.0	$ 0.8	$ 0.0	$ 4.8
Optimization Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	5.6		6.9
Cumulative cost incurred	6.9		6.9
Professional Fees [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	0.0	0.0	0.0	(0.5)
Professional Fees [Member] \| Optimization Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	0.0		0.0
Cumulative cost incurred	0.0		0.0
Retention and Separation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	0.0	0.8	0.0	5.3
Retention and Separation [Member] \| Optimization Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	5.5		6.8
Cumulative cost incurred	6.8		6.8
Other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	0.0	$ 0.0	0.0	$ 0.0
Other [Member] \| Optimization Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	0.1		0.1
Cumulative cost incurred	$ 0.1		$ 0.1

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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