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Revenue (Tables)

12 Months Ended

Dec. 31, 2025

Mineral Fiber [Member]

Disaggregation Of Revenue [Line Items]

Schedule of Net Sales by Major Customer Channel within Each Segment

The following tables present net sales by major customer channel within the Mineral Fiber and Architectural Specialties segments for the years ended December 31, 2025, 2024 and 2023:

Mineral Fiber		2025				2024				2023
Distributors		$	768.2			$	716.9			$	682.3
Home centers			105.8				107.0				103.5
Direct customers			60.3				60.5				57.1
Other			96.4				101.6				89.5
Total		$	1,030.7			$	986.0			$	932.4

Architectural Specialties [Member]

Disaggregation Of Revenue [Line Items]

Schedule of Net Sales by Major Customer Channel within Each Segment

Architectural Specialties		2025				2024				2023
Direct customers		$	309.9			$	214.6			$	159.7
Distributors			254.2				224.9				192.7
Other			26.0				20.2				10.4
Total		$	590.1			$	459.7			$	362.8

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