GOODWILL AND OTHER INTANGIBLE ASSETS

3 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets and goodwill consist of the following (in millions):



March 31, 2017	Weighted Average Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortizable intangible assets:
Customer relationships	22	$	252	$	(97	)	$	155
Technology	19	216		(106		)	110
Other	8	47		(24		)	23
Indefinite-lived intangible assets:
Trademarks		845		—			845
Total intangible assets		$	1,360	$	(227	)	$	1,133
Goodwill		$	1,337



December 31, 2016	Weighted Average Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortizable intangible assets:
Customer relationships	22	$	252	$	(94	)	$	158
Technology	19	216		(103		)	113
Other	9	45		(23		)	22
Indefinite-lived intangible assets:
Trademarks		845		—			845
Total intangible assets		$	1,358	$	(220	)	$	1,138
Goodwill		$	1,336

Other Intangible Assets

The Company expects the ongoing amortization expense for amortizable intangible assets to be approximately $27 million in each of the next five fiscal years. The Other category below primarily includes franchise agreements and emission rights. The changes in the gross carrying amount of intangible assets by asset group are as follows (in millions):



	Customer Relationships		Technology		Other		Trademarks		Total
Balance at December 31, 2016	$	252	$	216	$	45	$	845	$	1,358
Additions	—		—		2		—		2
Balance at March 31, 2017	$	252	$	216	$	47	$	845	$	1,360

Goodwill

The Company tests goodwill and indefinite-lived intangible assets for impairment during the fourth quarter of each year, or more frequently should circumstances change or events occur that would more likely than not reduce the fair value of a reporting unit below its carrying amount. No testing was deemed necessary in the first three months of 2017. The changes in the net carrying amount of goodwill by segment are as follows (in millions):



	Composites		Insulation		Roofing		Total
Balance at December 31, 2016	$	55	$	888	$	393	$	1,336
Foreign currency translation	1		—		—		1
Balance at March 31, 2017	$	56	$	888	$	393	$	1,337

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

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