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Goodwill | 12 Months Ended
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Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract] |
Goodwill | 7. Goodwill Goodwill is identified by segment as follows (in millions):
|  | United States |  |  | Canada |  |  | International |  |  | Total |
Balance at December 31, 2013 |  | $ | 202 |  |  | $ | 109 |  |  | $ | 22 |  |  | $ | 333 |
Additions |  |  | 20 |  |  |  | — |  |  |  | — |  |  |  | 20 |
Currency translation adjustments and other |  |  | (2 | ) |  |  | (8 | ) |  |  | 3 |  |  |  | (7 | )
Balance at December 31, 2014 |  |  | 220 |  |  |  | 101 |  |  |  | 25 |  |  |  | 346 |
Additions |  |  | 173 |  |  |  | 4 |  |  |  | 99 |  |  |  | 276 |
Impairment |  |  | (393 | ) |  |  | — |  |  |  | — |  |  |  | (393 | )
Currency translation adjustments and other |  |  | — |  |  |  | (17 | ) |  |  | (7 | ) |  |  | (24 | )
Balance at December 31, 2015 |  | $ | — |  |  | $ | 88 |  |  | $ | 117 |  |  | $ | 205 |
The Company considered the sustained decline in worldwide oil and gas prices and rig counts, which has impacted the Company’s current results and future outlook 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. During the three months ended December 31, 2015 the Company completed the interim test performed in the three months ended September 30, 2015, and identified additional indicators that the remaining goodwill may have fallen below its carrying amount. As a result of our valuations, the Company recognized $393 million impairment (U.S. Energy and U.S. Supply Chain) for the year ended December 31, 2015, an incremental loss of $138 million for the three months 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 our 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. Further, continued adverse market conditions could result in the recognition of additional impairment if the Company determines that the fair values of its reporting units have fallen below their carrying values.

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