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Goodwill | 12 Months Ended
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Dec. 31, 2018
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, 2016 (1) |  | $ | 117 |  |  | $ | 91 |  |  | $ | 103 |  |  | $ | 311 |
Additions |  |  | 2 |  |  |  | — |  |  |  | — |  |  |  | 2 |
Foreign currency translation adjustments |  |  | — |  |  |  | 7 |  |  |  | 8 |  |  |  | 15 |
Balance at December 31, 2017 |  | $ | 119 |  |  |  | 98 |  |  |  | 111 |  |  |  | 328 |
Foreign currency translation adjustments |  |  | — |  |  | $ | (8 | ) |  | $ | (6 | ) |  |  | (14 | )
Balance at December 31, 2018 |  | $ | 119 |  |  | $ | 90 |  |  | $ | 105 |  |  | $ | 314 |
| (1) | Net of prior years’ United States accumulated impairment of $393 million.
The Company performed its annual goodwill impairment test during the fourth quarter of 2018, 2017 and 2016 resulting in no impairments. The calculated fair value of each reporting unit exceeded its carrying value.

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- Definition The entire disclosure for goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2144439 + Details
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