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Commitments and Contingencies - Quarter (Details) | 9 Months Ended |
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Sep. 30, 2019 USD ($) site item | Dec. 31, 2018 USD ($)
Commitments And Contingencies [Line Items] |  |
Approximate number of homeowners' properties adjacent to or near certain of our landfills with agreements guaranteeing market value | item | 850 |
Number of landfills adjacent to or near homeowners' properties with agreements guaranteeing market value | item | 18 |
Environmental remediation reasonably possible additional losses high estimate | $ 145,000,000 |
Environmental remediation liabilities | $ 239,000,000 |
Number of sites listed on the EPA's NPL for which we have been notified we are a PRP | site | 75 |
Number of owned sites listed on the EPA's NPL for which we have been notified we are a PRP | site | 15 |
Number of non-owned sites listed on the EPA's NPL for which we have been notified we are a PRP | site | 60 |
Dollar threshold for environmental matters requiring disclosure under item 103 of the SEC's Regulation S-K | $ 100,000 |
Approximate percentage of workforce covered by collective bargaining agreements | 20.00% |
Expected time of completion of IRS audits | 18 months |
San Jacinto Waste Pits [Member] |  |
Commitments And Contingencies [Line Items] |  |
Environmental remediation liabilities | $ 56,000,000 | $ 55,000,000
Wheelabrator [Member] |  |
Commitments And Contingencies [Line Items] |  |
Maximum future payments | 57,000,000 |
Revolving Credit Facility [Member] |  |
Commitments And Contingencies [Line Items] |  |
Credit Facility, aggregate capacity | $ 2,750,000,000 |

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- Definition Percentage of employee participants subject to a collective bargaining arrangement to all participants in a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
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- Definition Approximate number of homeowners properties adjacent to or near certain of our landfills with agreements guaranteeing market value. + References No definition available. + Details
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