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Commitments and Contingencies (Details)
 1 Months Ended 2 Months Ended 6 Months Ended 9 Months Ended 20 Months Ended 33 Months Ended 110 Months Ended
Oct. 27, 2022
USD ($)
Oct. 14, 2020
USD ($)
Sep. 30, 2021
USD ($)
May 31, 2015
bbl
Jun. 30, 2024
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Sep. 20, 2022
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2024
USD ($)
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                    
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         750,000,000 750,000,000     750,000,000 750,000,000 750,000,000      
Significant costs related to legal and environmental remediation matters           0 $ 0              
Total release costs probable of recovery         505,000,000 505,000,000     505,000,000 505,000,000 505,000,000      
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 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         250,000,000 250,000,000     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     225,000,000 225,000,000 225,000,000      
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      
Membership Interest Purchase Agreement | Claims against PAA | Pending Litigation                            
Legal, Environmental or Regulatory Matters                            
Amount awarded to claimants by court         0                  
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         50,000,000 50,000,000     50,000,000 50,000,000 50,000,000 $ 225,000,000    
Current liabilities | Line 901 Incident                            
Legal, Environmental or Regulatory Matters                            
Remaining undiscounted liability         81,000,000 81,000,000     81,000,000 81,000,000 81,000,000      
Trade accounts receivable and other receivables, net | Line 901 Incident                            
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      
Excluding Line 901 Incident                            
Legal, Environmental or Regulatory Matters                            
Estimated undiscounted reserve for environmental liabilities         56,000,000 56,000,000     56,000,000 56,000,000 56,000,000 56,000,000    
Estimated undiscounted reserve for environmental liabilities, short-term         $ 12,000,000 $ 12,000,000     $ 12,000,000 $ 12,000,000 $ 12,000,000 $ 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 Other current liabilities Other current liabilities    
Estimated undiscounted reserve for environmental liabilities, long-term         $ 44,000,000 $ 44,000,000     $ 44,000,000 $ 44,000,000 $ 44,000,000 $ 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 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 $ 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 $ 1,000,000 $ 1,000,000