v3.8.0.1
Organization and Basis of Presentation Principles of Consolidation (Details) - USD ($)
$ in Millions
9 Months Ended
Jun. 01, 2017
Sep. 30, 2017
Sep. 30, 2016
Net cash from operating activities [1]   $ 549 $ 414
Net cash used in investing activities [1]   (751) (234)
Net Cash Provided by (Used in) Financing Activities [1]   (448) 301
Predecessor [Member]      
Net cash from operating activities   30 (15)
Net cash used in investing activities   26 $ (98)
Net Cash Provided by (Used in) Financing Activities   (34)  
Western Refining Logistics      
Revenues   310  
Management Fee Expense   $ 27  
WNRL Merger      
Business Acquisition, Effective Date of Acquisition Jun. 01, 2017    
[1] Adjusted to include the historical results of the Predecessors. See Note 1 for further discussion.