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Commitments and Contingencies - Other (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) site item | Dec. 31, 2020 USD ($)
Commitments And Contingencies [Line Items] |  |
Number of landfills adjacent to or near homeowners' properties with agreements guaranteeing market value | item | 18 |
Environmental remediation reasonably possible additional losses high estimate | $ 135 |
Environmental remediation liabilities | $ 213 |
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% |
San Jacinto Waste Pits [Member] |  |
Commitments And Contingencies [Line Items] |  |
Environmental remediation liabilities | $ 53 | $ 55

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- Definition Percentage of entity's employees covered by collective-bargaining arrangement to all participants in multiemployer pension plan. + References No definition available. + Details
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- Definition Number of non-owned sites listed on the environmental protection agency's national priorities list for which we have been notified we are a PRP. + References No definition available. + Details
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