v3.26.1
Equity
 3 Months Ended
Mar. 31, 2026
Equity [Abstract]  
Equity Equity
On November 5, 2024, MPC announced that our board of directors approved a $5.0 billion share repurchase authorization. As of March 31, 2026, $3.63 billion remained available for repurchase under the share repurchase authorization. The share repurchase authorization has no expiration date.
Total share repurchases were as follows for the respective periods:
Three Months Ended 
March 31,
(In millions, except per share data)20262025
Number of shares repurchased4 7 
Cash paid for shares repurchased$750 $1,057 
Average cost per share(a)
$213.45 $147.87 
(a)    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.