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Commitments and Contingencies (Details) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2022 USD ($) | Sep. 30, 2022 USD ($) site | May 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Commitments And Contingencies [Line Items] |  |  |  |
Number of landfills adjacent to or near homeowners' properties with agreements guaranteeing market value | site |  | 17 |  |
Environmental remediation reasonably possible additional losses high estimate |  | $ 140 |  |
Environmental remediation liabilities |  | $ 202 |  |
Number of sites listed on the EPA's NPL for which we have been notified we are a PRP | site |  | 73 |  |
Number of owned sites listed on the EPA's NPL for which we have been notified we are a PRP | site |  | 14 |  |
Number of non-owned sites listed on the EPA's NPL for which we have been notified we are a PRP | site |  | 59 |  |
Dollar threshold for environmental matters requiring disclosure under item 103 of the SEC's Regulation S-K |  | $ 1 |  |
Workforce covered by collective bargaining (as a percent) |  | 20.00% |  |
Expected time of completion of IRS audits |  | 18 months |  |
San Jacinto Waste Pits [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Revisions in estimate | $ 17 | $ 17 |  |
Environmental remediation liabilities |  | 68 |  | $ 53
Revolving Credit Facility [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Credit Facility, aggregate capacity |  | $ 3,500 | $ 3,500 |

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