Note 2 - Acquisitions Divestitures (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	[1]
Business Acquisition [Line Items]
Proceeds from sale of assets		$ 0	$ 47	$ 0
Gain (Loss) on Disposition of Property Plant Equipment	[2]	$ (4)	25	$ (4)
Alaska Terminal [Member]
Business Acquisition [Line Items]
Proceeds from sale of assets			28
Gain (Loss) on Disposition of Property Plant Equipment			$ (25)

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

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