v3.4.0.3

Related-Party Transactions Related-Party Transactions, Summary of Transactions Narrative (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 3 Months Ended
--- | --- | --- | ---
May. 13, 2016 | Apr. 20, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Mar. 31, 2015
Related Party Transactions |  |  |  |  |
Concentration risk, percentage |  |  | 56.00% |  | 56.00%
Imbalance settlement gains |  |  | $ 1 |  | $ 2
Reimbursements from Tesoro |  |  | 6 |  | $ 6
Cash distributions per unit (dollars per unit) |  |  |  | $ 0.78 |
Distribution declared (including IDRs) |  |  | 50 |  |
Omnibus Agreement |  |  |  |  |
Related Party Transactions |  |  |  |  |
Payment for Administrative Fees |  |  | 9 |  |
Secondment and Logistics Services Agreement |  |  |  |  |
Related Party Transactions |  |  |  |  |
Long-term Purchase Commitment, Amount |  |  | $ 2 |  |
Subsequent Event |  |  |  |  |
Related Party Transactions |  |  |  |  |
Declaration date |  | Apr. 20, 2016 |  |  |
Cash distributions per unit (dollars per unit) |  | $ 0.81 |  |  |
Distribution declared (including IDRs) | $ 59 |  |  |  |

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