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STATEMENTS OF CONSOLIDATED CASH FLOWS - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Operating activities:      
Net income $ 5,876 $ 5,970 $ 5,657
Reconciliation of net income to net cash flow provided by operating activities:      
Depreciation and accretion 2,107 1,987 1,871
Amortization of intangible assets 216 207 201
Amortization of major maintenance costs for reaction-based plants 72 59 64
Other amortization expense 228 220 207
Impairment of assets other than goodwill (see Notes 2 and 4) 50 57 32
Equity in income of unconsolidated affiliates (361) (408) (462)
Distributions received from unconsolidated affiliates attributable to earnings 364 406 446
Net losses (gains) attributable to asset sales and related matters (14) 2 (10)
Deferred income tax expense 46 45 12
Change in fair market value of derivative instruments 16 (20) 33
Non-cash expense related to long-term operating leases (see Note 17) 109 95 72
Net effect of changes in operating accounts (see Note 19) (124) (506) (555)
Other operating activities 0 1 1
Net cash flow provided by operating activities 8,585 8,115 7,569
Investing activities:      
Capital expenditures (5,620) (4,544) (3,266)
Cash used for business combinations, net of cash received (see Note 12) 0 (949) 0
Investments in unconsolidated affiliates (2) 0 (2)
Distributions received from unconsolidated affiliates attributable to the return of capital 74 77 42
Proceeds from asset sales and other matters 82 14 42
Other investing activities (25) (31) (13)
Net cash flow used in investing activities (5,491) (5,433) (3,197)
Financing activities:      
Borrowings under debt agreements 88,281 53,715 89,899
Repayments of debt (85,771) (50,546) (89,447)
Debt issuance costs (42) (44) (17)
Monetization of interest rate derivative instruments (see Note 14) 14 (33) 21
Cash distributions paid to common unitholders (see Note 8) (4,678) (4,512) (4,301)
Cash payments made in connection with distribution equivalent rights (44) (43) (38)
Cash distributions paid to noncontrolling interests (see Note 8) (93) (106) (160)
Cash contributions from noncontrolling interests (see Note 8) 5 90 44
Repurchase of common units under 2019 Buyback Program (see Note 8) (300) (219) (188)
Acquisition of noncontrolling interests 0 (400) (10)
Other financing activities (59) (66) (61)
Net cash flow used in financing activities (2,687) (2,164) (4,258)
Net change in cash and cash equivalents, including restricted cash 407 518 114
Cash and cash equivalents, including restricted cash, January 1 838 320 206
Cash and cash equivalents, including restricted cash, December 31 $ 1,245 $ 838 $ 320