v3.26.3
Master Limited Partnership (Tables)
 9 Months Ended
Sep. 30, 2026
Noncontrolling Interest [Line Items]  
Unit Repurchases
Total share repurchases were as follows for the respective periods:
Three Months Ended 
September 30,		Nine Months Ended 
September 30,
(In millions, except per share data)2026202520262025
Number of shares repurchased8 3 21 15 
Cash paid for shares repurchased(a)
$3,005 $650 $6,255 $2,399 
Average cost per share(b)
$357.68 $174.32 $289.71 $153.83 
(a)    2026 excludes $33 million paid in 2026 for excise tax on 2025 share repurchases. 2025 excludes $88 million paid in 2025 for excise tax on 2024 share repurchases.
(b)    The average cost per share includes excise tax on share repurchases resulting from the Inflation Reduction Act of 2022, but the excise tax does not reduce the remaining share repurchase authorization.
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net
As a result of equity transactions of MPLX, we are required to adjust noncontrolling interest and additional paid-in capital. Changes in MPC’s additional paid-in capital resulting from changes in its ownership interests in MPLX were as follows:
Three Months Ended 
September 30,		Nine Months Ended 
September 30,
(In millions)2026202520262025
Decrease due to change in ownership$(23)$(42)$(66)$(45)
Tax impact8 62 20 61 
Increase (decrease) in MPC's additional paid-in capital, net of tax$(15)$20 $(46)$16 
MPLX LP  
Noncontrolling Interest [Line Items]  
Unit Repurchases
Total unit repurchases were as follows for the respective periods:
Three Months Ended 
September 30,		Nine Months Ended 
September 30,
(In millions, except per unit data)2026202520262025
Number of common units repurchased1 2 3 6 
Cash paid for common units repurchased$50 $100 $150 $300 
Average cost per unit$58.69 $50.86 $57.09 $51.20