Commitments and Contingencies (Details) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2022 USD ($)	Jun. 30, 2022 USD ($) site	May 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Commitments And Contingencies [Line Items]
Environmental remediation reasonably possible additional losses high estimate		$ 140
Environmental remediation liabilities		$ 211
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		21 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