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v3.25.2

Segment Results (Schedule Of Net Sales to External Customers) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Segment Reporting Information [Line Items] |  |  |  |
Net sales to external customers | $ 424.6 | $ 365.1 | $ 807.3 | $ 691.4
Cost of goods sold | 248.8 | 215.8 | 481.6 | 417.8
Gross profit (loss) | 175.8 | 149.3 | 325.7 | 273.6
Selling, general and administrative expenses | 84.5 | 80.6 | 162.5 | 146.0
Equity (earnings) from unconsolidated affiliates, net | (31.9) | (26.3) | (58.5) | (53.5)
Segment operating income (loss) | 123.2 | 95.0 | 221.7 | 181.1
Operating Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales to external customers | 424.6 | 365.1 | 807.3 | 691.4
Cost of goods sold | 248.8 | 215.8 | 481.6 | 417.8
Gross profit (loss) | 175.8 | 149.3 | 325.7 | 273.6
Selling, general and administrative expenses | 84.5 | 80.6 | 162.5 | 146.0
Equity (earnings) from unconsolidated affiliates, net | (31.9) | (26.3) | (58.5) | (53.5)
Segment operating income (loss) | 123.2 | 95.0 | 221.7 | 181.1
Depreciation and amortization | 30.5 | 25.5 | 59.8 | 49.8
Purchases of property, plant and equipment | 19.9 | 19.9 | 39.0 | 34.6
Mineral Fiber [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales to external customers | 267.0 | 250.2 | 512.1 | 489.8
Mineral Fiber [Member] | Operating Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales to external customers | 267.0 | 250.2 | 512.1 | 489.8
Cost of goods sold | 156.7 | 147.5 | 304.7 | 293.2
Gross profit (loss) | 110.3 | 102.7 | 207.4 | 196.6
Selling, general and administrative expenses | 44.0 | 47.5 | 83.4 | 89.6
Equity (earnings) from unconsolidated affiliates, net | (32.1) | (26.5) | (58.9) | (53.9)
Segment operating income (loss) | 98.4 | 81.7 | 182.9 | 160.9
Depreciation and amortization | 22.1 | 19.7 | 42.9 | 39.6
Purchases of property, plant and equipment | 16.8 | 16.0 | 31.4 | 27.6
Architectural Specialties [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales to external customers | 157.6 | 114.9 | 295.2 | 201.6
Architectural Specialties [Member] | Operating Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales to external customers | 157.6 | 114.9 | 295.2 | 201.6
Cost of goods sold | 91.8 | 68.0 | 176.2 | 123.9
Gross profit (loss) | 65.8 | 46.9 | 119.0 | 77.7
Selling, general and administrative expenses | 40.2 | 32.7 | 78.6 | 55.8
Equity (earnings) from unconsolidated affiliates, net | 0.0 | 0.0 | 0.0 | 0.0
Segment operating income (loss) | 25.6 | 14.2 | 40.4 | 21.9
Depreciation and amortization | 8.4 | 5.8 | 16.9 | 10.2
Purchases of property, plant and equipment | 3.1 | 3.9 | 7.6 | 7.0
Unallocated Corporate [Member] | Unallocated Corporate [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Cost of goods sold | 0.3 | 0.3 | 0.7 | 0.7
Gross profit (loss) | (0.3) | (0.3) | (0.7) | (0.7)
Selling, general and administrative expenses | 0.3 | 0.4 | 0.5 | 0.6
Equity (earnings) from unconsolidated affiliates, net | 0.2 | 0.2 | 0.4 | 0.4
Segment operating income (loss) | (0.8) | (0.9) | (1.6) | (1.7)
Unallocated Corporate [Member] | Operating Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales to external customers | 0.0 | 0.0 | 0.0 | 0.0
Depreciation and amortization | 0.0 | 0.0 | 0.0 | 0.0
Purchases of property, plant and equipment | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0

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