Revenue (Tables)

3 Months Ended

Mar. 31, 2020

Mineral Fiber [Member]

Disaggregation Of Revenue [Line Items]

Schedule of Net Sales by Major Customer Group within Each Segment

The following tables provide net sales by major customer group within the Mineral Fiber and Architectural Specialties segments for the three months ended March 31, 2020 and 2019:

	Three Months Ended
	March 31,
Mineral Fiber	2020		2019
Distributors	$	141.9	$	144.6
Home centers		25.7		23.1
Direct customers		13.9		14.1
Retailers and other		16.2		14.9
Total	$	197.7	$	196.7

Architectural Specialties [Member]

Disaggregation Of Revenue [Line Items]

Schedule of Net Sales by Major Customer Group within Each Segment

	Three Months Ended
	March 31,
Architectural Specialties	2020		2019
Distributors	$	35.9	$	31.5
Direct customers		14.4		13.1
Retailers and other		0.7		0.8
Total	$	51.0	$	45.4