Commitments and Contingencies - Narrative (Details)			1 Months Ended		5 Months Ended	9 Months Ended			23 Months Ended	36 Months Ended	113 Months Ended
	Oct. 27, 2022 USD ($)	Oct. 14, 2020 USD ($)	Sep. 30, 2021 USD ($)	May 31, 2015 bbl	Sep. 30, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 20, 2022 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 USD ($)	Oct. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Apr. 25, 2019 USD ($)	Sep. 07, 2018 count
Line 901 Incident
Legal, Environmental or Regulatory Matters
Estimated size of release (in barrels) | bbl				2,934
Estimated size of release to reach pacific ocean (in barrels) | bbl				598
Costs related to the Line 901 incident						$ 120,000,000	$ 0
Recoveries from insurance carriers											$ 280,000,000
Receivable for remaining portion of release costs probable of recovery from insurance					$ 225,000,000	225,000,000			$ 225,000,000	$ 225,000,000	225,000,000
Aggregate total estimated costs					870,000,000	870,000,000			870,000,000	870,000,000	870,000,000
Total release costs probable of recovery					505,000,000	505,000,000			505,000,000	505,000,000	505,000,000
Line 901 Incident | Current liabilities
Legal, Environmental or Regulatory Matters
Remaining undiscounted liability					94,000,000	94,000,000			94,000,000	94,000,000	94,000,000
Line 901 Incident | Trade accounts receivable and other receivables, net
Legal, Environmental or Regulatory Matters
Receivable for remaining portion of release costs probable of recovery from insurance					175,000,000	175,000,000			175,000,000	175,000,000	175,000,000
Line 901 Incident | Other long-term assets, net
Legal, Environmental or Regulatory Matters
Receivable for remaining portion of release costs probable of recovery from insurance					50,000,000	50,000,000			50,000,000	50,000,000	50,000,000		$ 225,000,000
Line 901 Incident | Civil Penalties | Judicial Ruling
Legal, Environmental or Regulatory Matters
Amount paid to plaintiff		$ 24,000,000
Line 901 Incident | Compensation for Injuries to, Destruction of, Loss of Use of, Natural Resources | Judicial Ruling
Legal, Environmental or Regulatory Matters
Amount paid to plaintiff		$ 22,325,000
Line 901 Incident | May 2016 Indictment
Legal, Environmental or Regulatory Matters
Number of felony discharges found guilty | count															1
Number of misdemeanor charges found guilty | count															8
Number of misdemeanor charges found guilty, reporting | count															1
Number of misdemeanor charges found guilty, strict liability discharge | count															1
Number of misdemeanor charges found guilty, strict liability animal takings | count															6
Number of misdemeanor charges found not guilty, strict liability animal takings | count															1
Line 901 Incident | May 2016 Indictment | Judicial Ruling
Legal, Environmental or Regulatory Matters
Fines or penalties assessed														$ 3,350,000
Line 901 Incident | May 2016 Indictment | Judicial Ruling | Maximum
Legal, Environmental or Regulatory Matters
Amount awarded to claimants by court			$ 150,000
Line 901 Incident | May 2016 Indictment | Pending Litigation
Legal, Environmental or Regulatory Matters
Loss contingency, damages sought, value										275,000
Line 901 Incident | Class Action Lawsuit Claim of Damages | Pending Litigation
Legal, Environmental or Regulatory Matters
Litigation settlement agreement amount, subject to approval								$ 230,000,000
Line 901 Incident | Class Action Lawsuit Claim of Damages | Settled Litigation
Legal, Environmental or Regulatory Matters
Payments for legal settlements	$ 230,000,000
Line 901 Incident | 2024 settlements | Settled Litigation
Legal, Environmental or Regulatory Matters
Costs related to the Line 901 incident						120,000,000
Line 901 2015 Insurance Program
Legal, Environmental or Regulatory Matters
Recoveries from insurance carriers											275,000,000
Coverage limit under insurance program					500,000,000	500,000,000			500,000,000	500,000,000	500,000,000
Exceeded coverage limit under insurance program					370,000,000	370,000,000			370,000,000	370,000,000	370,000,000
Claim for Reimbursement From Insurance
Legal, Environmental or Regulatory Matters
Recoveries from insurance carriers									3,600,000
Receivable for remaining portion of release costs probable of recovery from insurance					225,000,000	225,000,000			225,000,000	225,000,000	225,000,000
Denial of Insurance Coverage
Legal, Environmental or Regulatory Matters
Receivable for remaining portion of release costs probable of recovery from insurance					185,000,000	185,000,000			185,000,000	185,000,000	185,000,000
Not Yet Accepted Nor Denied of Insurance Coverage
Legal, Environmental or Regulatory Matters
Receivable for remaining portion of release costs probable of recovery from insurance					40,000,000	40,000,000			40,000,000	40,000,000	40,000,000
Arbitration Proceedings Against Insurers
Legal, Environmental or Regulatory Matters
Receivable for remaining portion of release costs probable of recovery from insurance					225,000,000	$ 225,000,000			$ 225,000,000	$ 225,000,000	$ 225,000,000
Arbitration Proceedings Against Insurers, Binding Hearing in October | Subsequent Event
Legal, Environmental or Regulatory Matters
Receivable for remaining portion of release costs probable of recovery from insurance												$ 175,000,000
Membership Interest Purchase Agreement | Claims against PAA | Pending Litigation
Legal, Environmental or Regulatory Matters
Amount awarded to claimants by court					$ 0