v3.26.3
Earnings Per Share (Summary of Earnings Per Share) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Basic earnings per share:        
Net income attributable to MPC $ 7,447 $ 1,370 $ 13,096 $ 2,512
Income allocated to participating securities, basic (7) (2) (12) (3)
Income available to common stockholders - basic $ 7,440 $ 1,368 $ 13,084 $ 2,509
Weighted average common shares outstanding - basic (in shares) 279 303 287 307
Basic earnings per share $ 26.66 $ 4.51 $ 45.51 $ 8.16
Diluted earnings per share:        
Net income attributable to MPC $ 7,447 $ 1,370 $ 13,096 $ 2,512
Income allocated to participating securities, diluted (7) (2) (12) (3)
Income available to common stockholders - diluted $ 7,440 $ 1,368 $ 13,084 $ 2,509
Weighted average common shares outstanding - basic (in shares) 279 303 287 307
Effect of dilutive securities (in shares) 1 1 1 1
Weighted average shares outstanding - diluted (in shares) 280 304 288 308
Diluted earnings per share $ 26.59 $ 4.51 $ 45.40 $ 8.15