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v3.26.1

Revenue (Tables) | 6 Months Ended
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Jun. 30, 2026
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 three and six months ended June 30, 2026 and 2025:
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
Mineral Fiber |  | 2026 |  |  | 2025 |  |  | 2026 |  |  | 2025 |
Distributors |  | $ | 217.9 |  |  | $ | 200.2 |  |  | $ | 406.2 |  |  | $ | 380.2 |
Home centers |  |  | 27.3 |  |  |  | 25.0 |  |  |  | 57.5 |  |  |  | 52.0 |
Direct customers |  |  | 17.9 |  |  |  | 17.9 |  |  |  | 30.8 |  |  |  | 32.0 |
Other |  |  | 25.1 |  |  |  | 23.9 |  |  |  | 50.9 |  |  |  | 47.9 |
Total |  | $ | 288.2 |  |  | $ | 267.0 |  |  | $ | 545.4 |  |  | $ | 512.1 |
Architectural Specialties [Member] |
Disaggregation Of Revenue [Line Items] |
Schedule of Net Sales by Major Customer Channel within Each Segment |
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
Architectural Specialties |  | 2026 |  |  | 2025 |  |  | 2026 |  |  | 2025 |
Direct customers |  | $ | 96.4 |  |  | $ | 80.9 |  |  | $ | 177.0 |  |  | $ | 158.3 |
Distributors |  |  | 80.6 |  |  |  | 70.0 |  |  |  | 147.0 |  |  |  | 124.3 |
Other |  |  | 6.8 |  |  |  | 6.7 |  |  |  | 12.5 |  |  |  | 12.6 |
Total |  | $ | 183.8 |  |  | $ | 157.6 |  |  | $ | 336.5 |  |  | $ | 295.2 |

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