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Commitments and Contingencies (Details) $ in Millions	3 Months Ended		9 Months Ended
Commitments and Contingencies (Details) $ in Millions	Jun. 30, 2026 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2026 USD ($) site landfill	Dec. 31, 2025 USD ($)
Commitments and Contingencies
Landfills near properties guaranteeing market value \| landfill			18
Aggregate increase potential liability			$ 18
Environmental remediation liabilities			$ 220	$ 231
Sites EPA notified we are a PRP \| site			75
Owned sites EPA notified we are a PRP \| site			14
Non-owned sites EPA notified we are a PRP \| site			61
Workforce covered by collective bargaining (as a percent)			15.00%
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsNoncurrent
Commitments and Contingencies
Amount of IRS deposit net of reserves			$ 89	103
Tax Year 2017
Commitments and Contingencies
Income tax deposit paid		$ 103
Amount of refund received	$ 14
San Jacinto Waste Pits
Commitments and Contingencies
Environmental remediation liabilities			100	$ 100
$3.5 Billion Revolving Credit Facility \| Revolving Credit Facility \| Line of Credit
Commitments and Contingencies
Credit Facility, aggregate capacity			$ 3,500