Commitments and Contingencies - Narrative (Details) $ in Millions	1 Months Ended	122 Months Ended
	Mar. 31, 2025 USD ($) bbl	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Line 901 Incident
Loss Contingencies [Line Items]
Aggregate total estimated costs		$ 870
Line 901 Incident | Current liabilities
Loss Contingencies [Line Items]
Remaining undiscounted liability		20	$ 5
Line 901 2015 Insurance Program
Loss Contingencies [Line Items]
Recoveries from insurance carriers		275
Coverage limit under insurance program		500
Line 48 Incident
Loss Contingencies [Line Items]
Estimated size of release (in barrels) | bbl	125
Self-insured retention	$ 10
Aggregate cost to clean-up and remediate	$ 20
Clean-up and remediation activities		12
Arbitration Proceedings Against Insurers | Minimum
Loss Contingencies [Line Items]
Receivable for remaining portion of release costs probable of recovery from insurance		$ 225