XML 118 R72.htm IDEA: XBRL DOCUMENT v3.10.0.1
Acquisitions (Acquisition of Andeavor) (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Oct. 01, 2018
Dec. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Business Acquisition [Line Items]          
Fair value of shares issued     $ 19,766 $ 0 $ 0
Fair value of converted equity awards     203 0 0
Goodwill   $ 20,184 20,184 3,586 3,587
Pro-forma, purchase accounting inventory effects and transaction-related costs effect on net income attributable to MPC     727    
Refining & Marketing          
Business Acquisition [Line Items]          
Goodwill   5,020 5,020 519 519
Midstream          
Business Acquisition [Line Items]          
Goodwill   10,323 $ 10,323 $ 2,276 $ 2,276
Andeavor          
Business Acquisition [Line Items]          
Common units conversion ratio 1.87        
Cash consideration to unitholders (per unit) $ 152.27        
Common shares converted to cash, number of shares 22,900,000        
Shares converted, number of shares 128,200,000        
Shares issued or issuable, number of shares 239,800,000        
Fair value of shares issued $ 19,766        
Cash payment for acquisition 3,486        
Fair value of converted equity awards 203        
Goodwill 16,314        
Goodwill, expected tax deductible amount 893        
Property, plant and equipment, net 16,545        
Finite-lived intangibles 2,800        
Long-term debt 8,875        
Transaction costs $ 47        
Sales and other operating revenues   $ 11,300      
Andeavor | Minimum          
Business Acquisition [Line Items]          
Acquired finite-lived intangible assets, weighted average useful life 2 years        
Andeavor | Maximum          
Business Acquisition [Line Items]          
Acquired finite-lived intangible assets, weighted average useful life 10 years        
Andeavor | Customer contracts and relationships          
Business Acquisition [Line Items]          
Finite-lived intangibles $ 2,500        
Andeavor | Refining & Marketing          
Business Acquisition [Line Items]          
Goodwill 4,700        
Andeavor | Midstream          
Business Acquisition [Line Items]          
Goodwill 7,700        
Andeavor | Retail          
Business Acquisition [Line Items]          
Goodwill 3,900        
Andeavor | Line of Credit          
Business Acquisition [Line Items]          
Long-term debt 1,500        
Andeavor | Other Debt Obligations          
Business Acquisition [Line Items]          
Long-term debt $ 200