v3.26.1
Related Party Transactions (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Related Party Transaction [Line Items]        
Sales and other operating revenues [1] $ 51,994 $ 33,799 $ 86,194 $ 65,316
Purchases from related parties(a) 870 707 [2] 1,341 1,412 [2]
Related Party        
Related Party Transaction [Line Items]        
Sales and other operating revenues $ 738 $ 326 $ 976 $ 646
[1] Includes sales to related parties. See Note 6 for additional information. See Note 17 for the disaggregation of our revenue from external customers by segment and product line.
[2] The 2025 period includes purchases of ethanol from TAMH, an equity affiliate, through July 2025. MPC sold its interest in TAMH on July 31, 2025. TAMH ceased to be a related party after the sale. See Note 4.