XML 22 R10.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Landfill and Environmental Remediation Liabilities | 3 Months Ended
--- | ---
Mar. 31, 2018
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, 2018 |  | December 31, 2017
|  |  |  |  | Environmental |  |  |  |  |  |  |  | Environmental |  |  |
|  | Landfill |  | Remediation |  | Total |  | Landfill |  | Remediation |  | Total
Current (in accrued liabilities) |  | $ | 129 |  | $ | 28 |  | $ | 157 |  | $ | 128 |  | $ | 28 |  | $ | 156
Long-term |  |  | 1,572 |  |  | 223 |  |  | 1,795 |  |  | 1,547 |  |  | 223 |  |  | 1,770
|  | $ | 1,701 |  | $ | 251 |  | $ | 1,952 |  | $ | 1,675 |  | $ | 251 |  | $ | 1,926
The changes to landfill and environmental remediation liabilities for the three months ended March 31, 2018 are reflected in the table below (in millions):
|  |  |  |  | Environmental
|  | Landfill |  | Remediation
December 31, 2017 |  | $ | 1,675 |  | $ | 251
Obligations incurred and capitalized |  |  | 19 |  |  | —
Obligations settled |  |  | (19) |  |  | (5)
Interest accretion |  |  | 23 |  |  | 1
Revisions in estimates and interest rate assumptions |  |  | (9) |  |  | 4
Acquisitions, divestitures and other adjustments |  |  | 12 |  |  | —
March 31, 2018 |  | $ | 1,701 |  | $ | 251
At several of our landfills, we provide financial assurance by depositing cash into restricted trust funds or escrow accounts for purposes of demonstrating our ability to meet our 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.

X
- References No definition available. + Details
Name: | us-gaap_EnvironmentalRemediationObligationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Asset Retirement Obligation And Environmental Remediation Disclosure [Text Block] + References No definition available. + Details
Name: | wm_AssetRetirementObligationAndEnvironmentalRemediationDisclosureTextBlock
Namespace Prefix: | wm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration