Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

The following table presents the changes in the carrying amount of goodwill for each of the three years in the period ended December 31, 2017:



	General rentals			Trench, power and pump			Total
Balance at January 1, 2015 (1)	$	2,804		$	468		$	3,272
Goodwill related to acquisitions (2)	16			—			16
Foreign currency translation and other adjustments	(34		)	(11		)	(45		)
Balance at December 31, 2015 (1)	2,786			457			3,243
Goodwill related to acquisitions (2)	5			4			9
Foreign currency translation and other adjustments	6			2			8
Balance at December 31, 2016 (1)	2,797			463			3,260
Goodwill related to acquisitions (2) (3)	797			8			805
Foreign currency translation and other adjustments	13			4			17
Balance at December 31, 2017 (1)	$	3,607		$	475		$	4,082

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(1)	The total carrying amount of goodwill for all periods in the table above is reflected net of $1.557 billion of accumulated impairment charges, which were primarily recorded in our general rentals segment.


(2)	Includes goodwill adjustments for the effect on goodwill of changes to net assets acquired during the measurement period, which were not significant to our previously reported operating results or financial condition.


(3)	For additional detail on the acquisitions of NES and Neff in April 2017 and October 2017, respectively, which accounted for most of the 2017 goodwill related to acquisitions, see note 3 to our consolidated financial statements.

Components of intangible assets

Other intangible assets were comprised of the following at December 31, 2017 and 2016:



	December 31, 2017
	Weighted-Average Remaining Amortization Period	Gross Carrying Amount		Accumulated Amortization		Net Amount
Non-compete agreements	31 months	$	71	$	62	$	9
Customer relationships	9 years	$	1,750	$	884	$	866



	December 31, 2016
	Weighted-Average Remaining Amortization Period	Gross Carrying Amount		Accumulated Amortization		Net Amount
Non-compete agreements	28 months	$	70	$	57	$	13
Customer relationships	10 years	$	1,465	$	737	$	728
Trade names and associated trademarks	4 months	$	80	$	79	$	1

Our other intangibles assets, net at December 31, 2017 include the following assets associated with the acquisitions of NES and Neff discussed in note 3 to our consolidated financial statements. No residual value has been assigned to these assets which are being amortized using the sum of the years' digits method, which we believe best reflects the estimated pattern in which the economic benefits will be consumed.

Estimated future amortization expense of intangible assets

As of December 31, 2017, estimated amortization expense for other intangible assets for each of the next five years and thereafter was as follows:



2018	$	179
2019	158
2020	136
2021	115
2022	94
Thereafter	193
Total	$	875

December 31, 2017

Weighted-Average Remaining
Amortization Period

Net Carrying
Amount

Customer relationships-NES

Customer relationships-Neff