Revenue (Tables)

12 Months Ended

Dec. 31, 2023

Mineral Fiber [Member]

Disaggregation Of Revenue [Line Items]

Schedule of Net Sales by Major Customer Group within Each Segment

The following tables present net sales by major customer group within the Mineral Fiber and Architectural Specialties segments for the years ended December 31, 2023, 2022 and 2021:

Mineral Fiber	2023		2022		2021
Distributors	$	682.3	$	654.1	$	603.9
Home centers		103.5		99.1		94.4
Direct customers		57.1		61.0		59.2
Other		89.5		73.2		61.0
Total	$	932.4	$	887.4	$	818.5

Architectural Specialties [Member]

Disaggregation Of Revenue [Line Items]

Schedule of Net Sales by Major Customer Group within Each Segment

Architectural Specialties	2023		2022		2021
Distributors	$	192.7	$	174.4	$	150.5
Direct customers		159.7		168.0		134.6
Other		10.4		3.3		3.0
Total	$	362.8	$	345.7	$	288.1