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SEGMENT INFORMATION - Additions to Property, Plant and Equipment (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] |  |  |  |
Property, plant and equipment, additions | $ 176 | $ 132 | $ 358 | $ 265
Segment Reporting, Reconciling Item, Corporate Nonsegment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Property, plant and equipment, additions | 7 | 11 | 28 | 29
Insulation | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Property, plant and equipment, additions | 80 | 55 | 161 | 116
Roofing | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Property, plant and equipment, additions | 66 | 51 | 128 | 105
Total Segments | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Property, plant and equipment, additions | 169 | 121 | 330 | 236
Doors | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Property, plant and equipment, additions | $ 23 | $ 15 | $ 41 | $ 15

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