Commitments and Contingencies (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) item site	Dec. 31, 2021 USD ($)
Commitments And Contingencies [Line Items]
Number of landfills adjacent to or near homeowners' properties with agreements guaranteeing market value | item	17
Environmental remediation reasonably possible additional losses high estimate	$ 140
Environmental remediation liabilities	$ 216
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	24 months
San Jacinto Waste Pits [Member]
Commitments And Contingencies [Line Items]
Revisions in estimate	$ 17
Environmental remediation liabilities	70	$ 53
Revolving Credit Facility [Member]
Commitments And Contingencies [Line Items]
Credit Facility, aggregate capacity	$ 3,500