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Inventories (Tables)
 9 Months Ended
Sep. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of inventories
Inventories consisted of the following (in millions):
September 30,
2020		December 31,
2019
Refinery feedstocks$1,625 $2,399 
Refined petroleum products and blendstocks
3,180 4,034 
Renewable diesel feedstocks and products
29 46 
Ethanol feedstocks and products240 260 
Materials and supplies283 274 
Inventories$5,357 $7,013