v3.8.0.1
Operating Segments Operating Segments, Identifiable Assets (Details) - USD ($)
$ in Millions
Sep. 30, 2017
Dec. 31, 2016
Sep. 30, 2016
Dec. 31, 2015
Property, Plant and Equipment        
Assets $ 8,174 [1] $ 5,860    
Cash and cash equivalents [2] 38 [1] 688 $ 497 $ 16
North Dakota Gathering and Processing Assets [Member]        
Property, Plant and Equipment        
Cash and cash equivalents   673    
Operating Segments [Member] | Terminalling and Transportation        
Property, Plant and Equipment        
Assets 2,508 1,768    
Operating Segments [Member] | Gathering and Processing        
Property, Plant and Equipment        
Assets 5,066 3,392    
Operating Segments [Member] | Wholesale Segment [Member]        
Property, Plant and Equipment        
Assets [3] 556 0    
Corporate and Other [Member]        
Property, Plant and Equipment        
Assets [4] $ 44 $ 700    
[1] (a)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] The Wholesale business was acquired by Andeavor Logistics as part of the WNRL Merger on October 30, 2017 and the results are only for the period of June 1, 2017 through the end of the period.
[4] Other consists mainly of $688 million in cash and cash equivalents as of December 31, 2016, of which $673 million was used to fund the acquisition of the North Dakota Gathering and Processing Assets on January 1, 2017, increasing the Gathering and Processing segment’s identifiable assets as of September 30, 2017.