v3.26.1
Equity
 6 Months Ended
Jun. 30, 2026
Equity [Abstract]  
Equity Equity
On May 5, 2026, MPC announced that our board of directors approved a $5.0 billion share repurchase authorization in addition to the $5.0 billion share repurchase authorization announced on November 5, 2024. As of June 30, 2026, we had $6.13 billion remaining under the share repurchase authorizations. The share repurchase authorizations have no expiration date.
Total share repurchases were as follows for the respective periods:
Three Months Ended 
June 30,		Six Months Ended 
June 30,
(In millions, except per share data)2026202520262025
Number of shares repurchased9 5 13 12 
Cash paid for shares repurchased(a)
$2,500 $692 $3,250 $1,749 
Average cost per share(b)
$258.36 $146.43 $246.41 $147.29 
(a)    2026 excludes $33 million paid in 2026 for excise tax on 2025 share repurchases. 2025 excludes $88 million paid in 2025 for excise tax on 2024 share repurchases.
(b)    The average cost per share includes excise tax on share repurchases resulting from the Inflation Reduction Act of 2022, but the excise tax does not reduce the remaining share repurchase authorization.