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Consolidated Statements of Equity and Series A Preferred Units (Consolidated Statements of Equity) - USD ($)
$ in Millions
Total
Common Unit-holders Public
Common Unit-holder MPC
Series B Preferred Unit-holders
Accumulated Other Comprehensive Income (Loss)
Non-controlling Interests
Beginning Balance at Dec. 31, 2022 $ 12,546 $ 8,413 $ 3,293 $ 611 $ (8) $ 237
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 3,872 1,336 2,493 5 0 38
Conversion of Series A preferred units 73 73 0 0 0 0
Partners' Capital Account, Redemptions 600 2 3 595 0 0
Distributions (3,243) (1,125) (2,056) (21) 0  
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders           (41)
Contributions 31 0 31 0 0 0
Other 10 5 0 0 4 1
Ending Balance at Dec. 31, 2023 12,689 8,700 3,758 0 (4) 235
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 4,330 1,555 2,735 0 0 40
Unit repurchases (326) (326) 0 0 0 0
Conversion of Series A preferred units (675) (675) 0 0 0 0
Distributions (3,603) (1,289) (2,270) 0 0  
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders           (44)
Contributions 34 0 34 0 0 0
Other 8 7 0 0 1 0
Ending Balance at Dec. 31, 2024 13,807 9,322 4,257 0 (3) 231
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 4,952 1,791 3,121 0 0 40
Unit repurchases (400) (400) 0 0 0 0
Conversion of Series A preferred units 197 197 0 0 0 0
Distributions (4,062) (1,463) (2,555) 0 0  
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders           (44)
Contributions 21 0 21 0 0 0
Other 13 4 1 0 8 0
Ending Balance at Dec. 31, 2025 $ 14,528 $ 9,451 $ 4,845 $ 0 $ 5 $ 227