Goodwill and Intangible Assets - (Notes)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND INTANGIBLE ASSETS

The changes in the carrying amount of goodwill are detailed below by segment.



	North America			Latin America			Europe/ Africa/ Russia Caspian		Middle East/ Asia Pacific		Industrial Services			Total Goodwill
Balance at December 31, 2014	$	3,102		$	587		$	1,068	$	819	$	505		$	6,081
Currency translation adjustments	(5		)	(3		)	—		—		(3		)	(11		)
Balance at December 31, 2015	$	3,097		$	584		$	1,068	$	819	$	502		$	6,070

We perform an annual impairment test of goodwill as of October 1 of every year. There were no impairments of goodwill in any of the three years ended December 31, 2015 related to the annual impairment test.

Intangible assets are comprised of the following at December 31:



	2015						2014
	Gross Carrying Amount		Less: Accumulated Amortization		Net		Gross Carrying Amount		Less: Accumulated Amortization		Net
Technology	$	866	$	452	$	414	$	870	$	393	$	477
Customer relationships ⁽¹⁾	251		106		145		488		191		297
Trade names ⁽¹⁾	108		89		19		120		92		28
Other	18		13		5		23		13		10
Total intangibles	$	1,243	$	660	$	583	$	1,501	$	689	$	812


⁽¹⁾	During 2015, we recorded impairments relating to our customer relationships and trade names intangible assets totaling $116 million. See Note 3. "Impairment and Restructuring Charges" for further discussion.

Intangible assets are generally amortized on a straight-line basis with estimated useful lives ranging from 3 to 30 years. Amortization expense for the years ended December 31, 2015, 2014 and 2013 was $104 million, $107 million and $119 million, respectively. Estimated amortization expense for each of the subsequent five fiscal years is expected to be as follows:



Year	Estimated Amortization Expense
2016	$	87
2017	84
2018	77
2019	72
2020	62

- 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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