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Commitments and Contingencies - Legal, Environmental or Regulatory (Details) |  |  |  | 1 Months Ended | 9 Months Ended | 11 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 06, 2016 USD ($) item | Jul. 10, 2015 bbl | Jan. 01, 2015 bbl | May. 31, 2015 bbl | Mar. 31, 2016 USD ($) lawsuit | Mar. 31, 2016 USD ($) lawsuit | Dec. 31, 2015 USD ($) | Apr. 30, 2015 item
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |
Estimated undiscounted reserve for environmental liabilities |  |  |  |  | $ 176,000,000 | $ 176,000,000 | $ 185,000,000 |
Estimated undiscounted reserve for environmental liabilities, short-term |  |  |  |  | 69,000,000 | 69,000,000 | 81,000,000 |
Estimated undiscounted reserve for environmental liabilities, long-term |  |  |  |  | 107,000,000 | 107,000,000 | 104,000,000 |
Amounts probable of recovery under insurance and from third parties under indemnification agreements |  |  |  |  | 81,000,000 | 81,000,000 | $ 161,000,000 |
Line 901 Incident |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |
Aggregate total estimated costs |  |  |  |  | 269,000,000 | 269,000,000 |  |
Estimated undiscounted reserve for environmental liabilities |  |  |  |  | 104,000,000 | 104,000,000 |  |
Recoveries from insurance carriers |  |  |  |  |  | 112,000,000 |  |
Total release costs probable of recovery |  |  |  |  | 186,000,000 | 186,000,000 |  |
Amounts probable of recovery under insurance and from third parties under indemnification agreements |  |  |  |  | 74,000,000 | 74,000,000 |  |
Fines or penalties assessed |  |  |  |  | 0 | $ 0 |  |
Line 901 Incident | Class Action Lawsuits |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |
Number of cases filed during the period | lawsuit |  |  |  |  |  | 8 |  |
Number of cases consolidated into a single proceeding | lawsuit |  |  |  |  |  | 7 |  |
Line 901 Incident | Securities Law Class Action Lawsuits |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |
Number of cases filed during the period | lawsuit |  |  |  |  |  | 2 |  |
Line 901 Incident | Unitholder Derivative Lawsuits |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |
Number of cases filed during the period | lawsuit |  |  |  |  |  | 3 |  |
Line 901 Incident | Production of Books And Records Lawsuits |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |
Number of cases filed during the period | lawsuit |  |  |  |  |  | 2 |  |
Line 901 Incident | Worst Case Estimate |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |
Estimated size of release (in barrels) | bbl |  |  |  | 2,935 |  |  |  |
MP 29 Release |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |
Estimated size of release (in barrels) | bbl |  | 100 |  |  |  |  |  |
Fines or penalties assessed |  |  |  |  | 0 | $ 0 |  |
MP 29 Release | Maximum |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |
Aggregate total estimated costs |  |  |  |  | $ 10,000,000 | 10,000,000 |  |
MP 29 Release | Class Action Lawsuits |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |
Number of cases filed during the period | lawsuit |  |  |  |  | 1 |  |  |
In the Matter of Bakersfield Crude Terminal LLC et al |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |
Number of alleged rule violations | item |  |  |  |  |  |  |  | 10
Fines or penalties assessed |  |  |  |  | $ 0 | $ 0 |  |
Mesa to Basin Pipeline |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |
Estimated size of release (in barrels) | bbl |  |  | 500 |  |  |  |  |
Mesa to Basin Pipeline | PHMSA |  |  |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |  |  |
Number of occasions of alleged failure to carry out damage prevention program and other procedures | item | 4 |  |  |  |  |  |  |
Fines or penalties recommended | $ 190,000 |  |  |  |  |  |  |

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