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Loss Contingency, Clean-Up And Remediate Aggregate Cost

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The amount of clean-up and remediation activities pertaining to the specified contingency that was incurred in the period.

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Amount retained by the entity before insurance begins to provide coverage.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of loss contingency liability.

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Amount of cash inflow from the collection of receivables related to a loss contingency.

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Commitments and Contingencies - Narrative (Details) $ in Millions	1 Months Ended	3 Months Ended		12 Months Ended
	Mar. 31, 2025 USD ($) bbl	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)
Line 901 Incident
Loss Contingencies [Line Items]
Aggregate total estimated costs		$ 870
Costs related to the line 901 incident		0	$ 0
Line 901 Incident \| Current liabilities
Loss Contingencies [Line Items]
Remaining undiscounted liability		23		$ 22
Line 901 2015 Insurance Program
Loss Contingencies [Line Items]
Recoveries from insurance carriers		295		295
Coverage limit under insurance program		500		$ 500
Line 48 Incident
Loss Contingencies [Line Items]
Estimated size of release (in barrels) \| bbl	125
Self-insured retention	$ 10		10
Aggregate cost to clean-up and remediate	$ 15		$ 15
Clean-up and remediation activities		$ 12