Basis of Presentation and Summary of Significant Accounting Policies - Property, Plant and Equipment by Geographic Location (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 376.8	$ 358.8
Impairment of long-lived assets	0.0	0.0	$ 0.0
United States
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	235.1	225.0
Western Europe
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	83.2	76.0
Developing
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	48.9	48.2
Other Developed
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 9.6	$ 9.6