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v3.25.4

Revenue (Tables) | 12 Months Ended
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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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