Commitments and Contingencies - Legal, Environmental or Regulatory (Details)	1 Months Ended			12 Months Ended	83 Months Ended
	Apr. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	May 31, 2015 bbl	Sep. 30, 2021 USD ($)	Mar. 31, 2022 USD ($) lawsuit	Dec. 31, 2021 USD ($)	Apr. 25, 2019 USD ($)	Sep. 07, 2018 count
Legal, Environmental or Regulatory Matters
Estimated undiscounted reserve for environmental liabilities					$ 59,000,000	$ 57,000,000
Amounts probable of recovery under insurance and from third parties under indemnification agreements					11,000,000	11,000,000
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
Coverage limit under insurance program					500,000,000
Recoveries from insurance carriers					260,000,000
Total release costs probable of recovery					$ 500,000,000
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
Line 901 Incident | Class Action Lawsuit Claim of Damages | Subsequent Event | 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
Line 901 Incident | Unitholder Derivative Lawsuits | Subsequent Event | Pending Litigation
Legal, Environmental or Regulatory Matters
Litigation settlement agreement amount, subject to approval	$ 2,000,000
Other current liabilities
Legal, Environmental or Regulatory Matters
Estimated undiscounted reserve for environmental liabilities, short-term					$ 9,000,000	11,000,000
Other long-term liabilities and deferred credits
Legal, Environmental or Regulatory Matters
Estimated undiscounted reserve for environmental liabilities, long-term					50,000,000	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
Trade accounts payable and Other current liabilities | Line 901 Incident
Legal, Environmental or Regulatory Matters
Remaining undiscounted liability					335,000,000
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					$ 240,000,000