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Landfill and Environmental Remediation Liabilities | 3 Months Ended
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Mar. 31, 2022
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, 2022 | ​ | December 31, 2021
​ | ​ | ​ | ​ | ​ | Environmental | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Environmental | ​ | ​ | ​
​ |  | Landfill |  | Remediation |  | Total |  | Landfill |  | Remediation |  | Total
Current (in accrued liabilities) |  | $ | 128 | ​ | $ | 29 | ​ | $ | 157 | ​ | $ | 137 | ​ | $ | 29 | ​ | $ | 166
Long-term | ​ |  | 2,222 | ​ |  | 187 | ​ |  | 2,409 |  |  | 2,189 | ​ |  | 184 | ​ |  | 2,373
​ |  | $ | 2,350 | ​ | $ | 216 | ​ | $ | 2,566 | ​ | $ | 2,326 | ​ | $ | 213 | ​ | $ | 2,539
​ The changes to landfill and environmental remediation liabilities for the three months ended March 31, 2022 are reflected in the table below (in millions):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Environmental
​ |  | Landfill |  | Remediation
December 31, 2021 | ​ | $ | 2,326 | ​ | $ | 213
Obligations incurred and capitalized | ​ |  | 26 |  |  | —
Obligations settled | ​ |  | (17) |  |  | (7)
Interest accretion | ​ |  | 27 |  |  | 1
Revisions in estimates and interest rate assumptions (a) (b) | ​ |  | (13) |  |  | 9
Acquisitions, divestitures and other adjustments | ​ |  | 1 |  |  | —
March 31, 2022 | ​ | $ | 2,350 | ​ | $ | 216
(a) | The amount reported for our landfill liabilities includes decreases related to revisions in estimated costs and timing of capping, closure and post-closure liabilities.
(b) | The amount reported for our environmental remediation liabilities includes a $17 million charge in our Corporate and Other segment to adjust an indirect wholly-owned subsidiary’s estimated potential share of the liability for a proposed environmental remediation plan at a closed site, as discussed in Note 6. Partially offsetting this charge was a decrease of $8 million due to an increase from 1.50% at December 31, 2021 to 2.50% at March 31, 2022 in the risk-free discount rate used to measure these liabilities.
At several of our landfills, we provide financial assurance by depositing cash into restricted trust funds 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 12 for additional information related to these trusts.

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