Acquisition and Divestitures Acquisition and Divestitures (Details) number in Thousands, $ in Millions					3 Months Ended				9 Months Ended
		Oct. 30, 2017 USD ($)	Jun. 28, 2017 USD ($)	Jan. 01, 2017 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)		Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)		Nov. 08, 2017	Dec. 31, 2016 USD ($)
Acquisition and Divestitures
Borrowings under revolving credit agreements									$ 309	$ 761	[1]
Goodwill						$ 127			127				$ 117
Business Acquisition, Revenue						373				1,100
Business Acquisition, Net Earnings						100				277
Payments for (Proceeds from) Other Investing Activities			$ 28						(28)	4	[1]
(Gain) loss on asset disposals and impairments			$ 25			(1)	$ (2)	[2]	24	(3)	[2]
WNRL Merger
Acquisition and Divestitures
Finite-Lived Intangible Assets, Amortization Expense, Year Two						9			9
Business Acquisition, Revenue						1,086	877		3,148	2,515
Business Acquisition, Net Earnings						115	$ 86		349	$ 245
Finite-Lived Intangible Assets, Gross						130			130
Finite-Lived Intangible Assets, Accumulated Amortization						3			3
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months						9			9
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed									4
Business Combination, Separately Recognized Transactions, Expenses and Losses Recognized									5
Finite-Lived Intangible Assets, Amortization Expense, Year Three						9			9
Finite-Lived Intangible Assets, Amortization Expense, Year Four						9			9
Finite-Lived Intangible Assets, Amortization Expense, Year Five						9			9
Subsequent Event | WNRL Merger
Acquisition and Divestitures
Inventory		$ 11
Property, plant and equipment	[3]	1,301
Goodwill		$ 734
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		15 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$ 130
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest		1,763
Subsequent Event | Terminalling and Transportation | WNRL Merger
Acquisition and Divestitures
Goodwill		67
Subsequent Event | Wholesale Segment [Member] | WNRL Merger
Acquisition and Divestitures
Goodwill		667
Subsequent Event | Other Affiliates [Member] | WNRL Merger
Acquisition and Divestitures
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$ 130
North Dakota Gathering and Processing Assets [Member]
Acquisition and Divestitures
Business Combination, Consideration Transferred				$ 705
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment									31
Goodwill, Purchase Accounting Adjustments									4
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles									(32)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory									(3)
Inventory						2			2
Property, plant and equipment						571			571
Intangibles	[4]					122			122
Goodwill	[5]					10			10
Total purchase price						705			$ 705
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									10 years 7 months 6 days
Amortization of Intangible Assets						2			$ 9
Business Acquisition, Revenue						111			307
Business Acquisition, Net Earnings						$ 16			$ 42
Anacortes Logistics Assets [Member] | Subsequent Event
Acquisition and Divestitures
Business Combination, Consideration Transferred					$ 445
Storage Capacity												3,900
Borrowings under revolving credit agreements					400
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable					$ 45
Anacortes Marine Terminal [Member] | Subsequent Event
Acquisition and Divestitures
Terminal Throughput Capacity, Barrels Per Day												73
Anacortes Rail Facility Acquisition [Member] | Subsequent Event
Acquisition and Divestitures
Terminal Throughput Capacity, Barrels Per Day												4
Pipeline Throughput Capacity, Barrels per Day												111

[1] Adjusted to include the historical results of the Predecessors. See Note 1 for further discussion.

[2] Adjusted to include the historical results of the Predecessors. See Note 1 for further discussion.

[3] Estimated useful lives ranging from 3 to 22 years have been assumed based on the preliminary valuation.

[4] The intangibles consist of customer contracts with a weighted average amortization period of 10.6 years. Amortization of intangible assets for the three and nine months ended September 30, 2017 was $2 million and $9 million, respectively.

[5] We evaluated several factors that contributed to the amount of goodwill presented above. These factors include the geographic proximity of the acquired assets to existing assets owned by the Partnership along with the improved overall basin logistics efficiencies we can leverage.