v3.26.3
Master Limited Partnership (Noncontrolling Interest) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Equity transactions of MPLX $ (42) $ (46) $ (42) $ (38) $ (87) $ 83    
Additional Paid-in Capital                
Decrease due to change in ownership (23)     (42)     $ (66) $ (45)
Tax impact 8     62     20 61
Equity transactions of MPLX $ (15) $ (17) $ (14) $ 20 $ (29) $ 25 $ (46) $ 16