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SEGMENT INFORMATION (Tables)

6 Months Ended

Jun. 30, 2025

Segment Reporting [Abstract]

Reconciliation of Revenue from Segments to Consolidated

The following tables show a disaggregation of our Net sales by segment and geographic region. Corporate eliminations (shown below) largely reflect intercompany sales from Insulation to Roofing. External customer sales are attributed to geographic region based upon the location from which the product is sold to the external customer.

			Three Months Ended June 30, 2025
(In millions)			Roofing			Insulation			Doors			Subtotal			Eliminations			Consolidated
Disaggregation Categories
North America Residential			$	1,128		$	346		$	489		$	1,963		$	(40)		$	1,923
North America Non-Residential			118			373			—			491			(3)			488
Total North America			1,246			719			489			2,454			(43)			2,411
Europe			55			180			58			293			(1)			292
Asia-Pacific			2			31			3			36			—			36
Rest of world			—			4			4			8			—			8
NET SALES			$	1,303		$	934		$	554		$	2,791		$	(44)		$	2,747

			Three Months Ended June 30, 2024
(In millions)			Roofing			Insulation			Doors			Subtotal			Eliminations			Consolidated
Disaggregation Categories
North America Residential			$	1,088		$	383		$	277		$	1,748		$	(37)		$	1,711
North America Non-Residential			112			367			—			479			(3)			476
Total North America			1,200			750			277			2,227			(40)			2,187
Europe			49			184			30			263			—			263
Asia-Pacific			3			37			1			41			—			41
Rest of world			—			3			3			6			—			6
NET SALES			$	1,252		$	974		$	311		$	2,537		$	(40)		$	2,497

			Six Months Ended June 30, 2025
(In millions)			Roofing			Insulation			Doors			Subtotal			Eliminations			Consolidated
Disaggregation Categories
North America Residential			$	2,096		$	728		$	968		$	3,792		$	(75)		$	3,717
North America Non-Residential			218			705			—			923			(5)			918
Total North America			2,314			1,433			968			4,715			(80)			4,635
Europe			103			346			114			563			(3)			560
Asia-Pacific			6			56			3			65			—			65
Rest of world			—			8			9			17			—			17
NET SALES			$	2,423		$	1,843		$	1,094		$	5,360		$	(83)		$	5,277

			Six Months Ended June 30, 2024
(In millions)			Roofing			Insulation			Doors			Subtotal			Eliminations			Consolidated
Disaggregation Categories
North America Residential			$	2,048		$	781		$	277		$	3,106		$	(70)		$	3,036
North America Non-Residential			198			718			—			916			(7)			909
Total North America			2,246			1,499			277			4,022			(77)			3,945
Europe			98			359			30			487			(1)			486
Asia-Pacific			6			65			1			72			—			72
Rest of world			—			8			3			11			—			11
NET SALES			$	2,350		$	1,931		$	311		$	4,592		$	(78)		$	4,514

Schedule of Earnings before Interest and Taxes

The following table summarizes EBITDA by segment:

			Three Months Ended June 30,						Six Months Ended June 30,
(In millions)			2025			2024			2025			2024
Reportable Segments
Roofing			$	457		$	437		$	789		$	775
Insulation			225			246			450			469
Doors			75			61			143			61
Total reportable segments			757			744			1,382			1,305
Restructuring excluding depreciation			(9)			(34)			(12)			(44)
Gains on sale of certain precious metals			12			—			21			—
Paroc marine recall			(1)			(6)			(2)			(7)
Strategic review-related charges			—			(15)			—			(17)
Acquisition-related transaction costs			—			(29)			—			(47)
Loss on Assets Held for Sale			(24)			—			(26)			—
Acquisition-related integration costs excluding amortization			(4)			(21)			(6)			(21)
Recognition of acquisition inventory fair value step-up			—			(12)			—			(12)
General corporate expense and other			(54)			(66)			(114)			(112)
Total corporate, other and eliminations			(80)			(183)			(139)			(260)
Depreciation and amortization			(172)			(142)			(331)			(250)
Interest expense, net			(63)			(63)			(127)			(79)
EARNINGS FROM CONTINUING OPERATIONS BEFORE TAXES			$	442		$	356		$	785		$	716

Reconciliation of Assets from Segment to Consolidated

The following table summarizes total assets by segment:

(In millions)			June 30, 2025						December 31, 2024
Assets allocated to reportable segments
Roofing			$	3,643					$	3,107
Insulation			4,514						4,231
Doors			4,433						4,454
Total assets allocated to reportable segments			12,590						11,792
Assets not allocated to reportable segments
Cash and cash equivalents			230						321
Non-current deferred income taxes			8						8
Investments in affiliates			60						86
Corporate property, plant and equipment, other assets and eliminations			921						862
TOTAL ASSETS FROM CONTINUING OPERATIONS			$	13,809					$	13,069

Schedule of Additions to Property, Plant and Equipment by Segment

The following table summarizes cash paid for property, plant and equipment by segment:

			Three Months Ended June 30,						Six Months Ended June 30,
(In millions)			2025			2024			2025			2024
Reportable Segments
Roofing			$	66		51			$	128		$	105
Insulation			80			55			161			116
Doors			23			15			41			15
Total reportable segments			$	169		$	121		$	330		$	236
General corporate additions			7			11			28			29
ADDITIONS TO PROPERTY, PLANT AND EQUIPMENT FROM CONTINUING OPERATIONS			$	176		$	132		$	358		$	265

Schedule of Property, Plant and Equipment by Geographical Areas

The following table summarizes total property, plant and equipment, net by geographic region:

(In millions)			June 30, 2025						December 31, 2024
North America			$	3,247					$	3,182
Europe			599						524
Asia Pacific			64						67
Rest of world			42						45
PROPERTY, PLANT AND EQUIPMENT, NET FROM CONTINUING OPERATIONS			$	3,952					$	3,818

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