The Company has three reportable segments: Composites, Insulation and Roofing. Accounting policies for the segments are the same as those for the Company. The Company’s three reportable segments are defined as follows:

Composites – The Company manufactures, fabricates and sells glass reinforcements in the form of fiber. Glass reinforcement materials are also used downstream by the Composites segment to manufacture and sell glass fiber products in the form of fabrics, non-wovens and other specialized products.

Insulation – Within our Insulation segment, the Company manufactures and sells fiberglass insulation into residential, commercial, industrial and other markets for both thermal and acoustical applications. It also manufactures and sells glass fiber pipe insulation, flexible duct media, bonded and granulated mineral wool insulation, cellular glass insulation and foam insulation used in above- and below-grade construction applications.

Roofing – Within our Roofing segment, the Company manufactures and sells residential roofing shingles, oxidized asphalt materials, roofing components used in residential and commercial construction and specialty applications, and synthetic packaging materials.

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.


	Twelve Months Ended December 31,
	2019		2018		2017
Reportable Segments
Composites	$	2,059	$	2,041	$	2,068
Insulation	2,668		2,720		2,001
Roofing	2,634		2,492		2,553
Total reportable segments	7,361		7,253		6,622
Corporate eliminations	(201)		(196)		(238)
NET SALES	$	7,160	$	7,057	$	6,384


External Customer Sales by Geographic Region
United States	$	4,776	$	4,647	$	4,495
Europe	1,209		1,209		661
Asia Pacific	664		656		675
Canada and other	511		545		553
NET SALES	$	7,160	$	7,057	$	6,384

Earnings before interest and taxes (EBIT) by segment consists of net sales less related costs and expenses and are presented on a basis that is used internally for evaluating segment performance. Certain items, such as general corporate expenses or income and certain other expense or income items, are excluded from the internal evaluation of segment performance. Accordingly, these items are not reflected in EBIT for our reportable segments and are included within Corporate, Other and Eliminations.


	Twelve Months Ended December 31,
	2019		2018		2017
Reportable Segments
Composites	$	247	$	251	$	291
Insulation	230		290		177
Roofing	455		434		535
Total reportable segments	932		975		1,003

Restructuring costs	(28)		(22)		(48)
Acquisition-related costs	—		(16)		(15)
Recognition of acquisition inventory fair value step-up	—		(2)		(5)
Litigation settlement gain, net of legal fees	—		—		29
Pension settlement losses	(43)		—		(64)
Environmental liability charges	(4)		—		(15)



General corporate expense and other	(104)		(114)		(148)
Total Corporate, other and eliminations	(179)		(154)		(266)
EBIT	$	753	$	821	$	737

The following table summarizes total assets by segment and property, plant and equipment by geographic region (in millions):


	December 31,
TOTAL ASSETS	2019		2018
Reportable Segments
Composites	$	2,470	$	2,480
Insulation	4,975		4,907
Roofing	1,784		1,750
Total reportable segments	9,229		9,137

Cash and cash equivalents	172		78
Noncurrent deferred income taxes	46		43
Investments in affiliates	51		51
Assets held for sale	1		3
Corporate property, plant and equipment, other assets and eliminations	507		459
CONSOLIDATED TOTAL ASSETS	$	10,006	$	9,771


	December 31,
PROPERTY, PLANT AND EQUIPMENT BY GEOGRAPHIC REGION	2019		2018
United States	$	2,204	$	2,166
Europe	762		779
Asia Pacific	601		567
Canada and other	288		299
TOTAL PROPERTY, PLANT AND EQUIPMENT	$	3,855	$	3,811


	Twelve Months Ended December 31,
	2019		2018		2017
Reportable Segments
Composites	$	154	$	147	$	144
Insulation	194		186		124
Roofing	54		51		50
Total reportable segments	402		384		318
General corporate depreciation and amortization (a)	55		49		53
CONSOLIDATED PROVISION FOR DEPRECIATION AND AMORTIZATION	$	457	$	433	$	371

(a)In 2019, 2018 and 2017, General corporate depreciation and amortization expense included $9 million, $10 million and $17 million, respectively, of accelerated depreciation related to restructuring actions further explained in Note 12 to the Consolidated Financial Statements.

The following table summarizes additions to property, plant and equipment on an accrual basis by segment (in millions):


	Twelve Months Ended December 31,
	2019		2018		2017
Reportable Segments
Composites	$	123	$	154	$	148
Insulation	210		240		151
Roofing	56		91		66
Total reportable segments	389		485		365
General corporate additions	62		57		37
CONSOLIDATED ADDITIONS TO PROPERTY, PLANT AND EQUIPMENT	$	451	$	542	$	402