Note 2 - Acquisitions WNRL Paragraph (Details) - USD ($) $ in Millions		3 Months Ended															12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	[2]	Jun. 30, 2018	[2]	Mar. 31, 2018	[2]	Dec. 31, 2017		Sep. 30, 2017	[2]	Jun. 30, 2017	[2]	Mar. 31, 2017	[2]	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 1,051							$ 956	[1]							$ 1,051		$ 956	[1]
Finite-Lived Intangible Assets, Accumulated Amortization		156							106								156		106
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		50															50
Finite-Lived Intangible Assets, Amortization Expense, Year Two		50															50
Finite-Lived Intangible Assets, Amortization Expense, Year Three		50															50
Finite-Lived Intangible Assets, Amortization Expense, Year Four		50															50
Finite-Lived Intangible Assets, Amortization Expense, Year Five		50															50
Revenues		623	$ 642		$ 569		$ 546		$ 1,114	[2]	$ 1,094		$ 614		$ 427		2,380	[3]	3,249	[3]	$ 1,669	[3]
Net Earnings Attributable to Partners																	628		349		$ 339
WNRL Merger [Member]
Business Acquisition [Line Items]
Goodwill, Purchase Accounting Adjustments																	55
Goodwill		620															620
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	[4]	1,295															1,295
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		130															$ 130
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life																	15 years
Finite-Lived Intangible Assets, Accumulated Amortization		14															$ 14
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		9															9
Finite-Lived Intangible Assets, Amortization Expense, Year Two		9															9
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
Business Acquisition, Transaction Costs		17															17
Business Combination, Integration Related Costs																	3
Business Acquisition, Pro Forma Revenue																			4,300
Business Acquisition, Pro Forma Net Income (Loss)																			403
Revenues																	415		1,500
Net Earnings Attributable to Partners																	115		$ 40
Gathering and Processing [Member] | WNRL Merger [Member]
Business Acquisition [Line Items]
Goodwill		374															374
Terminalling and Transportation Segment [Member] | WNRL Merger [Member]
Business Acquisition [Line Items]
Goodwill		197															197
Wholesale Segment [Member] | WNRL Merger [Member]
Business Acquisition [Line Items]
Goodwill		$ 49															$ 49

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

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

[3] All periods include the historical results of the Predecessors. See Notes 1 and 2 for further discussion.

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