GOODWILL AND OTHER INTANGIBLE ASSETS

6 Months Ended

Jun. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND INTANGIBLE ASSETS

The balances and changes in the carrying amount of Goodwill by segment are as follows (in millions of dollars):



	United States		Canada			Other businesses			Total
Balance at January 1, 2018	$	192	$	130		$	222		$	544
Impairment	—		—			(105		)	(105		)
Translation	—		(10		)	(5		)	(15		)
Balance at December 31, 2018	192		120			112			424
Translation	—		5			—			5
Balance at June 30, 2019	$	192	$	125		$	112		$	429

The cumulative goodwill impairment charges by segment as of June 30, 2019 and December 31, 2018 are as follows (in millions of dollars):



	United States		Canada		Other businesses		Total
Cumulative goodwill impairment charges	$	24	$	32	$	176	$	232

The balances and changes in Intangible assets, net are as follows (in millions of dollars):



		June 30, 2019						December 31, 2018
	Weighted average life	Gross carrying amount		Accumulated amortization		Net carrying amount		Gross carrying amount		Accumulated amortization		Net carrying amount
Customer lists and relationships	14.4 years	$	397	$	209	$	188	$	410	$	204	$	206
Trademarks, trade names and other	13.8 years	37		20		17		24		15		9
Non-amortized trade names and other		99		—		99		99		—		99
Capitalized software	4.3 years	605		472		133		657		511		146
Total intangible assets	8.8 years	$	1,138	$	701	$	437	$	1,190	$	730	$	460

Grainger tests reporting units' goodwill and intangible assets for impairment annually during the fourth quarter and more frequently if impairment indicators exist. Accordingly, Grainger periodically performs qualitative assessments of significant events and circumstances such as reporting units' historical and current results, assumptions regarding future performance, strategic initiatives and overall economic factors to determine the existence of impairment indicators and assess if it is more likely than not that the fair value of reporting units or intangible assets is less than their carrying value and if a quantitative impairment test is necessary.

Grainger's qualitative assessment for the six months ended June 30, 2019 did not indicate the presence of any impairment triggering events. Changes in assumptions regarding future performance, as well as the ability to execute on growth initiatives and productivity improvements, may have a significant impact on future cash flows. Likewise, an unfavorable economic environment and changes in market conditions, discount rates or other factors may result in future impairments of goodwill and intangible assets.