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Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of Goodwill Identified by Segment | Goodwill is identified by segment as follows (in millions):
|  | United States |  |  | Canada |  |  | International |  |  | Total |
Balance at December 31, 2019 (1) |  | $ | 125 |  |  | $ | 67 |  |  | $ | 53 |  |  | $ | 245 |
Impairment |  |  | (125 | ) |  |  | (60 | ) |  |  | (45 | ) |  |  | (230 | )
Foreign currency translation adjustments |  |  | — |  |  |  | (7 | ) |  |  | (8 | ) |  |  | (15 | )
Balance at December 31, 2020 |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Additions |  |  | 67 |  |  |  | — |  |  |  | — |  |  |  | 67 |
Impairment |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Foreign currency translation adjustments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Balance at December 31, 2021 |  | $ | 67 |  |  | $ | — |  |  | $ | — |  |  | $ | 67 |
(1) Net of prior years accumulated impairment of $393 million, $27 million and $54 million in the U.S., Canada and International segments, respectively.

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267 + Details
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