Rendering

Component: (Network and Table)
Network
2416402 - Disclosure - Inventories (Summary Of Inventories) (Detail)
(http://www.marathonpetroleum.com/role/InventoriesSummaryOfInventoriesDetail)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001510295 (http://www.sec.gov/CIK)
Inventory Disclosure [Abstract]Period [Axis]
2016-12-31
2015-12-31
Inventory Disclosure [Abstract]
 
 
Crude oil and refinery feedstocks
2,208,000,000  
2,180,000,000  
Refined products
2,810,000,000  
2,804,000,000  
Materials and supplies
485,000,000  
438,000,000  
Merchandise
153,000,000  
173,000,000  
Lower of cost or market reserve
0  
(370,000,000) 
Total
5,656,000,000  
 
5,225,000,000