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Commitments and Contingencies - Legal, Environmental or Regulatory (Details) |  |  | 1 Months Ended | 9 Months Ended | 12 Months Ended | 14 Months Ended | 104 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 27, 2022 USD ($) | Oct. 14, 2020 USD ($) | Sep. 30, 2021 USD ($) | May 31, 2015 bbl | Sep. 20, 2022 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2023 USD ($) | 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 bbl) | bbl |  |  |  | 2,934 |  |  |  |  |  |  |  |
Estimated size of release to reach Pacific Ocean (in bbl) | bbl |  |  |  | 598 |  |  |  |  |  |  |  |
Recoveries from insurance carriers |  |  |  |  |  |  |  |  |  | $ 280,000,000 |  |
Aggregate total estimated costs |  |  |  |  |  | $ 750,000,000 |  |  | $ 750,000,000 | 750,000,000 |  |
Significant costs related to legal and environmental remediation matters |  |  |  |  |  | 10,000,000 | $ 95,000,000 | $ 15,000,000 |  |  |  |
Total release costs probable of recovery |  |  |  |  |  | 505,000,000 |  |  | 505,000,000 | 505,000,000 |  |
Line 901 Incident | Civil Penalties | Judicial Ruling |  |  |  |  |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |  |  |  |  |
Penalties or compensation paid |  | $ 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 |  |  |  |  |  |  |  |  |  |  |  |
Penalties or compensation paid |  | $ 22,325,000 |  |  |  |  |  |  |  |  |  |
Line 901 Incident | May 2016 Indictment |  |  |  |  |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |  |  |  |  |
Number of felony charges 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 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 | Maximum | Judicial Ruling |  |  |  |  |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |  |  |  |  |
Amount awarded to claimants by court |  |  | $ 150,000 |  |  |  |  |  |  |  |  |
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 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 |  |
Exceeded coverage limit under insurance program |  |  |  |  |  | 250,000,000 |  |  | 250,000,000 | 250,000,000 |  |
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 |  |
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 |  |
Response to Request for Reimbursement Not Received |  |  |  |  |  |  |  |  |  |  |  |
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 |  |
Arbitration Proceedings Against Insurers |  |  |  |  |  |  |  |  |  |  |  |
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 |  |
Other long-term assets, net | Line 901 Incident |  |  |  |  |  |  |  |  |  |  |  |
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 |  |
Current liabilities | Line 901 Incident |  |  |  |  |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |  |  |  |  |
Remaining undiscounted liability |  |  |  |  |  | 94,000,000 | 105,000,000 |  | 94,000,000 | 94,000,000 |  |
Excluding Line 901 Incident |  |  |  |  |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |  |  |  |  |
Estimated undiscounted reserve for environmental liabilities |  |  |  |  |  | 56,000,000 | 55,000,000 |  | 56,000,000 | 56,000,000 |  |
Estimated undiscounted reserve for environmental liabilities, short-term |  |  |  |  |  | $ 10,000,000 | $ 10,000,000 |  | $ 10,000,000 | $ 10,000,000 |  |
Estimated undiscounted reserve for environmental liabilities, short-term [Extensible Enumeration] |  |  |  |  |  | Other current liabilities | Other current liabilities |  | Other current liabilities | Other current liabilities |  |
Estimated undiscounted reserve for environmental liabilities, long-term |  |  |  |  |  | $ 46,000,000 | $ 45,000,000 |  | $ 46,000,000 | $ 46,000,000 |  |
Estimated undiscounted reserve for environmental liabilities, long-term [Extensible Enumeration] |  |  |  |  |  | Other long-term liabilities and deferred credits | Other long-term liabilities and deferred credits |  | Other long-term liabilities and deferred credits | Other long-term liabilities and deferred credits |  |
Amounts probable of recovery under insurance and from third parties under indemnification agreements |  |  |  |  |  | $ 4,000,000 | $ 4,000,000 |  | $ 4,000,000 | $ 4,000,000 |  |
Excluding Line 901 Incident | Other long-term assets, net |  |  |  |  |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |  |  |  |  |
Amounts probable of recovery under insurance and from third parties under indemnification agreements |  |  |  |  |  | $ 1,000,000 | $ 1,000,000 |  | $ 1,000,000 | $ 1,000,000 |  |

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