Commitments and Contingencies - Legal, Environmental or Regulatory (Details)	1 Months Ended			6 Months Ended	12 Months Ended	86 Months Ended
	Apr. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	May 31, 2015 bbl	Jun. 30, 2022 USD ($) lawsuit	Sep. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) lawsuit	Dec. 31, 2021 USD ($)	Apr. 25, 2019 USD ($)	Sep. 07, 2018 count
Legal, Environmental or Regulatory Matters
Estimated undiscounted reserve for environmental liabilities				$ 58,000,000		$ 58,000,000	$ 57,000,000
Amounts probable of recovery under insurance and from third parties under indemnification agreements				11,000,000		11,000,000	11,000,000
Other current liabilities
Legal, Environmental or Regulatory Matters
Estimated undiscounted reserve for environmental liabilities, short-term				10,000,000		10,000,000	11,000,000
Other long-term liabilities and deferred credits
Legal, Environmental or Regulatory Matters
Estimated undiscounted reserve for environmental liabilities, long-term				48,000,000		48,000,000	46,000,000
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
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
Aggregate total estimated costs				725,000,000		725,000,000
Coverage limit under insurance program				500,000,000		500,000,000
Recoveries from insurance carriers						260,000,000
Total release costs probable of recovery				500,000,000		500,000,000
Line 901 Incident | Trade accounts payable and Other current liabilities
Legal, Environmental or Regulatory Matters
Remaining undiscounted liability				330,000,000		330,000,000
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				$ 240,000,000		$ 240,000,000
Line 901 Incident | Civil Penalties | Judicial Ruling
Legal, Environmental or Regulatory Matters
Penalties or compensation paid					$ 24,000,000
Line 901 Incident | Consent Decree, 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 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 | Maximum | Judicial Ruling
Legal, Environmental or Regulatory Matters
Amount awarded to claimants by court		$ 150,000
Line 901 Incident | Class Action Lawsuits
Legal, Environmental or Regulatory Matters
Number of cases filed | lawsuit						9
Line 901 Incident | Class Action Lawsuits | Pending Litigation
Legal, Environmental or Regulatory Matters
Number of proceedings pending | lawsuit				2		2
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 | Unitholder Derivative Lawsuits | Pending Litigation
Legal, Environmental or Regulatory Matters
Number of proceedings pending | lawsuit				1		1
Litigation settlement agreement amount, subject to approval	$ 2,000,000