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v3.21.1

Landfill and Environmental Remediation Liabilities | 3 Months Ended
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Mar. 31, 2021
Landfill and Environmental Remediation Liabilities |
Landfill and Environmental Remediation Liabilities | 2. Landfill and Environmental Remediation Liabilities Liabilities for landfill and environmental remediation costs are presented in the table below (in millions):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, 2021 | ​ | December 31, 2020
​ | ​ | ​ | ​ | ​ | Environmental | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Environmental | ​ | ​ | ​
​ |  | Landfill |  | Remediation |  | Total |  | Landfill |  | Remediation |  | Total
Current (in accrued liabilities) |  | $ | 130 | ​ | $ | 25 | ​ | $ | 155 | ​ | $ | 138 | ​ | $ | 26 | ​ | $ | 164
Long-term | ​ |  | 2,069 | ​ |  | 193 | ​ |  | 2,262 |  |  | 2,018 | ​ |  | 204 | ​ |  | 2,222
​ |  | $ | 2,199 | ​ | $ | 218 | ​ | $ | 2,417 | ​ | $ | 2,156 | ​ | $ | 230 | ​ | $ | 2,386
​ The changes to landfill and environmental remediation liabilities for the three months ended March 31, 2021 are reflected in the table below (in millions):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Environmental
​ |  | Landfill |  | Remediation
December 31, 2020 | ​ | $ | 2,156 | ​ | $ | 230
Obligations incurred and capitalized | ​ |  | 26 |  |  | —
Obligations settled | ​ |  | (16) |  |  | (5)
Interest accretion | ​ |  | 26 |  |  | —
Revisions in estimates and interest rate assumptions | ​ |  | 7 |  |  | (7)
Acquisitions, divestitures and other adjustments | ​ |  | — |  |  | —
March 31, 2021 | ​ | $ | 2,199 | ​ | $ | 218
​ At several of our landfills, we provide financial assurance by depositing cash into restricted trust funds or escrow accounts for purposes of settling final capping, closure, post-closure and environmental remediation obligations. Generally, these trust funds are established to comply with statutory requirements and operating agreements. See Note 13 for additional information related to these trusts.

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