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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2024
Goodwill and Other Intangible Assets |
Changes in Goodwill by Reportable Segment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Recycling | ​ | WM | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Collection and Disposal | ​ | Processing | ​ | Healthcare | ​ | ​ | ​ | ​ | ​ | ​
​ |  | East Tier |  | West Tier |  | Other Ancillary |  | and Sales |  | Solutions |  | Other |  | Total
Balance, December 31, 2022 | ​ | $ | 5,072 | ​ | $ | 3,696 | ​ | $ | 27 | ​ | $ | 527 | ​ | $ | — | ​ | $ | 1 | ​ | $ | 9,323
Acquired goodwill | ​ |  | 13 | ​ |  | 70 | ​ |  | — | ​ |  | 7 | ​ |  | — | ​ |  | — | ​ |  | 90
Divested goodwill | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | —
Impairments | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (168) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (168)
Foreign currency translation and other | ​ |  | 9 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 9
Balance, December 31, 2023 | ​ | $ | 5,094 | ​ | $ | 3,766 | ​ | $ | 27 | ​ | $ | 366 | ​ | $ | — | ​ | $ | 1 | ​ | $ | 9,254
Acquired goodwill | ​ |  | 553 | ​ |  | 30 | ​ |  | — | ​ |  | 5 | ​ |  | 3,633 | ​ |  | — | ​ |  | 4,221
Divested goodwill | ​ |  | — | ​ |  | (4) | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | (4)
Impairments | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Foreign currency translation and other | ​ |  | (32) | ​ |  | — | ​ |  | — | ​ |  | (1) | ​ |  | — | ​ |  | — | ​ |  | (33)
Balance, December 31, 2024 | ​ | $ | 5,615 | ​ | $ | 3,792 | ​ | $ | 27 | ​ | $ | 370 | ​ | $ | 3,633 | ​ | $ | 1 | ​ | $ | 13,438
​
Schedule of Other Intangible Assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Recycling | ​ | WM | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Collection and Disposal | ​ | Processing | ​ | Healthcare | ​ | ​ | ​ | ​ | ​ | ​
​ |  | East Tier |  | West Tier |  | Other Ancillary |  | and Sales |  | Solutions |  | Other |  | Total
Balance, December 31, 2022 | ​ | $ | 5,072 | ​ | $ | 3,696 | ​ | $ | 27 | ​ | $ | 527 | ​ | $ | — | ​ | $ | 1 | ​ | $ | 9,323
Acquired goodwill | ​ |  | 13 | ​ |  | 70 | ​ |  | — | ​ |  | 7 | ​ |  | — | ​ |  | — | ​ |  | 90
Divested goodwill | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | —
Impairments | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (168) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (168)
Foreign currency translation and other | ​ |  | 9 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 9
Balance, December 31, 2023 | ​ | $ | 5,094 | ​ | $ | 3,766 | ​ | $ | 27 | ​ | $ | 366 | ​ | $ | — | ​ | $ | 1 | ​ | $ | 9,254
Acquired goodwill | ​ |  | 553 | ​ |  | 30 | ​ |  | — | ​ |  | 5 | ​ |  | 3,633 | ​ |  | — | ​ |  | 4,221
Divested goodwill | ​ |  | — | ​ |  | (4) | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | (4)
Impairments | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Foreign currency translation and other | ​ |  | (32) | ​ |  | — | ​ |  | — | ​ |  | (1) | ​ |  | — | ​ |  | — | ​ |  | (33)
Balance, December 31, 2024 | ​ | $ | 5,615 | ​ | $ | 3,792 | ​ | $ | 27 | ​ | $ | 370 | ​ | $ | 3,633 | ​ | $ | 1 | ​ | $ | 13,438
​

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