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Summary of Significant Accounting Standards and Policies (Tables) | 9 Months Ended
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Sep. 30, 2021
Summary of Significant Accounting Policies |
Schedule of goodwill | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | North | ​ | South | ​ | Asia- | ​ | ​ | ​ | ​ | ​ | ​ | ​
(in millions) |  | America |  | America |  | Pacific |  | EMEA |  | Total |
Goodwill before impairment charges | ​ | $ | 622 | ​ | $ | 50 | ​ | $ | 316 | ​ | $ | 69 | ​ | $ | 1,057 | ​
Accumulated impairment charges | ​ | ​ | (1) | ​ | ​ | (33) | ​ | ​ | (121) | ​ | ​ | — | ​ | ​ | (155) | ​
Balance at January 1, 2021 | ​ | ​ | 621 | ​ | ​ | 17 | ​ | ​ | 195 | ​ | ​ | 69 | ​ | ​ | 902 | ​
Acquisitions | ​ | ​ | 1 | ​ | ​ | — | ​ | ​ | 3 | ​ | ​ | 20 | ​ | ​ | 24 | ​
Currency translation | ​ | ​ | — | ​ | ​ | (1) | ​ | ​ | (6) | ​ | ​ | (3) | ​ | ​ | (10) | ​
Balance at September 30, 2021 | ​ | $ | 622 | ​ | $ | 16 | ​ | $ | 192 | ​ | $ | 86 | ​ | $ | 916 | ​
Schedule of indefinite-lived intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(in millions) | ​ | As of September 30, 2021 |  | As of December 31, 2020 | ​
Trademarks/tradenames (indefinite-lived) | ​ | $ | 143 |  | $ | 143 | ​

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