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Landfill and Environmental Remediation Liabilities (Tables) | 6 Months Ended
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Jun. 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):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2022 | ​ | December 31, 2021
​ | ​ | ​ | ​ | ​ | Environmental | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Environmental | ​ | ​ | ​
​ |  | Landfill |  | Remediation |  | Total |  | Landfill |  | Remediation |  | Total
Current (in accrued liabilities) |  | $ | 135 | ​ | $ | 29 | ​ | $ | 164 | ​ | $ | 137 | ​ | $ | 29 | ​ | $ | 166
Long-term | ​ |  | 2,244 | ​ |  | 182 | ​ |  | 2,426 |  |  | 2,189 | ​ |  | 184 | ​ |  | 2,373
​ |  | $ | 2,379 | ​ | $ | 211 | ​ | $ | 2,590 | ​ | $ | 2,326 | ​ | $ | 213 | ​ | $ | 2,539
Changes to Landfill and Environmental Remediation Liabilities | The changes to landfill and environmental remediation liabilities for the six months ended June 30, 2022 are reflected in the table below (in millions):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Environmental
​ |  | Landfill |  | Remediation
December 31, 2021 | ​ | $ | 2,326 | ​ | $ | 213
Obligations incurred and capitalized | ​ |  | 56 |  |  | —
Obligations settled | ​ |  | (43) |  |  | (12)
Interest accretion | ​ |  | 54 |  |  | 1
Revisions in estimates and interest rate assumptions (a) (b) | ​ |  | (13) |  |  | 9
Acquisitions, divestitures and other adjustments | ​ |  | (1) |  |  | —
June 30, 2022 | ​ | $ | 2,379 | ​ | $ | 211
(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 $11 million due to an increase from 1.50% at December 31, 2021 to 3.00% at June 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q4) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 + Details
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