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Landfill and Environmental Remediation Liabilities | 6 Months Ended
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Jun. 30, 2017
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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):
|  | June 30, 2017 |  |  | December 31, 2016 |
|  | Landfill |  |  | Environmental Remediation |  |  | Total |  |  | Landfill |  |  | Environmental Remediation |  |  | Total |
Current (in accrued liabilities) |  | $ | 138 |  |  | $ | 26 |  |  | $ | 164 |  |  | $ | 119 |  |  | $ | 28 |  |  | $ | 147 |
Long-term |  |  | 1,493 |  |  |  | 219 |  |  |  | 1,712 |  |  |  | 1,457 |  |  |  | 218 |  |  |  | 1,675 |
|  | $ | 1,631 |  |  | $ | 245 |  |  | $ | 1,876 |  |  | $ | 1,576 |  |  | $ | 246 |  |  | $ | 1,822 |
The changes to landfill and environmental remediation liabilities for the six months ended June 30, 2017 are reflected in the table below (in millions):
|  | Landfill |  |  | Environmental Remediation |
December 31, 2016 |  | $ | 1,576 |  |  | $ | 246 |
Obligations incurred and capitalized |  |  | 33 |  |  |  | — |
Obligations settled |  |  | (38 | ) |  |  | (10 | )
Interest accretion |  |  | 45 |  |  |  | 2 |
Revisions in estimates and interest rate assumptions |  |  | 13 |  |  |  | 7 |
Acquisitions, divestitures and other adjustments |  |  | 2 |  |  |  | — |
June 30, 2017 |  | $ | 1,631 |  |  | $ | 245 |
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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