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Landfill and Environmental Remediation Liabilities (Tables) | 9 Months Ended
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Sep. 30, 2022
Landfill and Environmental Remediation Liabilities |
Liabilities for Landfill and Environmental Remediation Costs | Liabilities for landfill and environmental remediation costs are presented in the table below (in millions):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2022 | ​ | December 31, 2021
​ | ​ | ​ | ​ | ​ | Environmental | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Environmental | ​ | ​ | ​
​ |  | Landfill |  | Remediation |  | Total |  | Landfill |  | Remediation |  | Total
Current (in accrued liabilities) |  | $ | 124 | ​ | $ | 29 | ​ | $ | 153 | ​ | $ | 137 | ​ | $ | 29 | ​ | $ | 166
Long-term | ​ |  | 2,263 | ​ |  | 173 | ​ |  | 2,436 |  |  | 2,189 | ​ |  | 184 | ​ |  | 2,373
​ |  | $ | 2,387 | ​ | $ | 202 | ​ | $ | 2,589 | ​ | $ | 2,326 | ​ | $ | 213 | ​ | $ | 2,539
Changes to Landfill and Environmental Remediation Liabilities | The changes to landfill and environmental remediation liabilities for the nine months ended September 30, 2022 are reflected in the table below (in millions):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Environmental
​ |  | Landfill |  | Remediation
December 31, 2021 | ​ | $ | 2,326 | ​ | $ | 213
Obligations incurred and capitalized | ​ |  | 86 |  |  | —
Obligations settled | ​ |  | (83) |  |  | (18)
Interest accretion | ​ |  | 81 |  |  | 3
Revisions in estimates and interest rate assumptions (a) (b) | ​ |  | (15) |  |  | 4
Acquisitions, divestitures and other adjustments | ​ |  | (8) |  |  | —
September 30, 2022 | ​ | $ | 2,387 | ​ | $ | 202
(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 $16 million due to an increase from 1.50% at December 31, 2021 to 3.75% at September 30, 2022 in the risk-free discount rate used to measure these liabilities.

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- Definition Tabular disclosure of material liabilities for remediation, site restoration, postclosure, monitoring commitments, or other exit costs that may occur on the sale, disposal or abandonment of a property as a result of unanticipated contamination of the assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q4) -URI https://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 + Details
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