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Consolidated Statements of Cash Flows - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Operating activities:      
Net income $ 4,952 $ 4,357 $ 3,966
Adjustments to reconcile net income to net cash provided by operating activities:      
Amortization of deferred financing costs and debt discount 30 54 55
Depreciation and amortization 1,351 1,283 1,213
Deferred income taxes 7 2 3
Gain on equity method investments (484) (20) (92)
(Gain)/loss on disposal of assets (161) 3 (14)
Income from equity method investments (697) (802) (600)
Distributions from unconsolidated affiliates 864 826 736
Change in fair value of derivatives (17) (3) 0
Changes in:      
Current receivables 48 180 14
Inventories (26) (20) (19)
Current liabilities and other current assets (12) 5 (17)
Assets and liabilities - related parties 126 84 84
Right of use assets and operating lease liabilities 3 (3) 0
Deferred revenue (74) (5) 107
All other, net (1) 5 (39)
Net cash provided by operating activities 5,909 5,946 5,397
Investing activities:      
Additions to property, plant and equipment (1,808) (1,056) (937)
Acquisitions, net of cash acquired (3,316) (622) (246)
Disposal of assets 975 1 26
Investments - acquisitions and contributions 1,008 464 98
Investments - redemptions, repayments, return of capital and sales proceeds 293 146 3
All other, net 8 0 0
Net cash used in investing activities (4,856) (1,995) (1,252)
Financing activities:      
Long-term debt borrowings 6,541 1,630 1,589
Long-term debt repayments 2,464 1,151 1,001
Debt issuance costs (63) (15) (15)
Unit repurchases [1] (400) (326) 0
Distributions to noncontrolling interests (44) (44) (41)
Distributions to LP unitholders (4,018) (3,559) (3,181)
Contributions from MPC 24 35 31
All other, net (5) (6) (2)
Net cash used in financing activities (435) (3,480) (3,335)
Net change in cash, cash equivalents and restricted cash 618 471 810
Cash, cash equivalents and restricted cash at beginning of period 1,519 1,048 238
Cash, cash equivalents and restricted cash at end of period 2,137 1,519 1,048
Revolving Credit Facility      
Financing activities:      
Related party debt borrowings 50 0 0
Related party debt repayments (50) 0 0
Series A Preferred Stock [Member]      
Financing activities:      
Distributions to Preferred Unitholders (6) (44) (94)
Series B Preferred Stock [Member]      
Financing activities:      
Redemption of Series B preferred units 0 0 (600)
Distributions to Preferred Unitholders $ 0 $ 0 $ (21)
[1] Cash paid for common units repurchased and average cost per unit includes commissions paid to brokers during the period.