Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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Number of shares of equity interests issued or issuable to acquire entity.

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The aggregate direct operating costs incurred during the reporting period.

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Amount of incentive obligation paid in cash or stock during the period to a limited liability corporation managing member or limited partnership general partner.

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The number of limited partner units issued.

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Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense.

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Amount after tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

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Basis of Presentation Narrative (Details) - USD ($) $ in Millions			3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 30, 2017	Jun. 01, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Feb. 27, 2017
Limited Partners' Capital Account, Units Issued								5,000,000
Direct Operating Costs			$ 865	$ 610	$ 2,197	$ 1,750
Other Cost and Expense, Operating			34	38	95	111
Operating expenses (excluding depreciation and amortization)			$ 899	$ 648	2,292	1,861
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent					$ 0	$ 10
Western Refining Acquisition
Business Acquisition, Effective Date of Acquisition		Jun. 01, 2017
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares		42,617,738
Subsequent Event \| WNRL Merger
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	0.4921
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage	59.00%
Subsequent Event \| IDR/GP Transaction [Member]
Limited Partners' Capital Account, Units Issued	78,000,000
Minimum \| Subsequent Event
Incentive Distribution, Distribution	$ 60
Maximum \| Subsequent Event
Incentive Distribution, Distribution	$ 160
Western Refining Logistics [Member] \| Subsequent Event \| WNRL Merger
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	0.5233
Andeavor [Member] \| Subsequent Event \| WNRL Merger
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	0.4639
Logistics \| Western Refining Logistics [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage					52.00%
Logistics \| Andeavor Logistics [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage					33.00%		34.00%