SEGMENT INFORMATION (Tables)

6 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Reconciliation of Revenue from Segments to Consolidated

The following table summarizes our Net sales by segment and geographic region (in millions). Corporate eliminations (shown below) largely reflect intercompany sales from Composites 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,				Six Months Ended June 30,
	2020		2019		2020		2019
Reportable Segments
Composites	$	398	$	535	$	892	$	1,048
Insulation	595		661		1,198		1,252
Roofing	677		778		1,232		1,392
Total reportable segments	1,670		1,974		3,322		3,692
Corporate eliminations	(45)		(56)		(96)		(107)
NET SALES	$	1,625	$	1,918	$	3,226	$	3,585

Schedule of Revenues by Geographical Areas

External Customer Sales by Geographic Region
United States	$	1,128	$	1,297	$	2,188	$	2,397
Europe	256		314		543		610
Asia-Pacific	146		174		274		323
Rest of world	95		133		221		255
NET SALES	$	1,625	$	1,918	$	3,226	$	3,585

Schedule of Earnings before Interest and Taxes

The following table summarizes EBIT by segment (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Reportable Segments
Composites	$	6	$	67	$	50	$	124
Insulation	32		42		71		57
Roofing	148		151		212		225
Total reportable segments	186		260		333		406
Restructuring (costs) / gains	(5)		(1)		(10)		1
Gains on sale of certain precious metals	9		—		19		—
Goodwill impairment charge	—		—		(944)		—
Intangible assets impairment charge	—		—		(43)		—
General corporate expense and other	(19)		(29)		(50)		(59)
Total corporate, other and eliminations	(15)		(30)		(1,028)		(58)
EBIT	$	171	$	230	$	(695)	$	348