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Landfill and Environmental Remediation Liabilities - Summary (Detail) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Landfill and environmental remediation liabilities |  |
Total, Environmental Remediation | $ 216 |
Current (in accrued liabilities) | 157 | $ 166
Long-term | 2,409 | 2,373
Total | 2,566 | 2,539
Landfill [Member] |  |
Landfill and environmental remediation liabilities |  |
Current (in accrued liabilities), Landfill | 128 | 137
Long-term, Landfill | 2,222 | 2,189
Total, Landfill | 2,350 | 2,326
Environmental Remediation Liabilities [Member] |  |
Landfill and environmental remediation liabilities |  |
Current (in accrued liabilities), Environmental Remediation | 29 | 29
Long-term, Environmental Remediation | 187 | 184
Total, Environmental Remediation | $ 216 | $ 213

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