7. Goodwill

Goodwill is identified by segment as follows (in millions):

	United States		Canada		International			Total
Balance at December 31, 2015		—	$	88	$	117		$	205
Additions		117		—		—			117
Currency translation adjustments and other		—		3		(14	)		(11	)
Balance at December 31, 2016	$	117		91		103			311
Additions		2		—		—			2
Currency translation adjustments and other		—	$	7	$	8			15
Balance at December 31, 2017	$	119	$	98	$	111		$	328

During the fourth quarter of 2017 and 2016, the Company performed its annual goodwill impairment test resulting in no impairment. The calculated fair values of all of the Company’s reporting units were in excess of the respective reporting unit’s carrying value.

In 2016, in connection with the Power Service acquisition (see Note 19 “Acquisitions”) and the related changes in the management structure, the Company established a new reporting unit, U.S. Process Solutions, under the United States reportable segment. The U.S. Process Solutions reporting unit primarily consists of the Power Service business and the Odessa Pumps business (formally a U.S. Energy component with zero goodwill value). The U.S. Process Solutions reporting unit has a goodwill balance of $119 million, as a result of the fair value measurement of the net assets acquired in the Power Service acquisition.

During the third quarter of 2015, the Company considered the sustained decline in worldwide oil and gas prices and rig counts as well as the decline in the market value of the Company’s stock, as indicators that the fair value of the Company’s reporting units’ goodwill could have fallen below their carrying value. As a result, the Company performed a goodwill impairment test as of September 30, 2015, and recognized an estimated impairment of $255 million in U.S. Energy and International reporting units. Subsequently, in the fourth quarter of 2015 the Company completed its interim test and recognized an incremental loss of $138 million. As a result, a total of $393 million goodwill impairment (U.S. Energy and U.S. Supply Chain) were recognized for the year ended December 31, 2015. The international reporting unit showed impairment indicators during the step 1 goodwill impairment calculation. However, no impairment was recognized as a result of the step 2 analysis. The Company recorded a valuation allowance against the full value of its deferred tax assets in the United States, therefore, no tax benefit was reported on its goodwill impairment for the year ended December 31, 2015. See Note 9 “Income Taxes” for a discussion of the valuation allowance recorded at December 31, 2015.