v3.8.0.1

Related-Party Transactions Related-Party Transactions (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2017
Related Party Transaction |
Schedule of Related Party Transactions | SUMMARY OF REVENUE AND EXPENSE TRANSACTIONS WITH ANDEAVOR, INCLUDING PREDECESSORS (in millions)
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Revenues (a) | $ | 219 |  |  | $ | 184 |  |  | $ | 624 |  |  | $ | 521 |
Operating expenses (b) | 32 |  |  | 38 |  |  | 109 |  |  | 107 |
General and administrative expenses | 20 |  |  | 19 |  |  | 58 |  |  | 52 |
(a) | Andeavor accounted for 49% and 60% of our total revenues for the three months ended September 30, 2017 and 2016, respectively, and 49% and 58% for the nine months ended September 30, 2017 and 2016, respectively.
(b) | Net of reimbursements from Andeavor pursuant to the Amended Omnibus Agreement, the Carson Assets Indemnity Agreement and other affiliate agreements of $7 million and $3 million for the three months ended September 30, 2017 and 2016, respectively, and $12 million for both the nine months ended September 30, 2017 and 2016.

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
Name: | us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration