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UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Operating activities:    
Net income $ 4,055 $ 4,163
Reconciliation of net income to net cash flows provided by operating activities:    
Depreciation and accretion 1,388 1,336
Amortization of intangible assets 148 132
Amortization of major maintenance costs for reaction-based plants 48 38
Other amortization expense 158 169
Impairment of assets other than goodwill 28 48
Equity in income of unconsolidated affiliates (347) (335)
Distributions received from unconsolidated affiliates attributable to earnings 330 329
Net losses (gains) attributable to asset sales and related matters (4) 3
Deferred income tax expense 5 24
Change in fair market value of derivative instruments 48 46
Non-cash expense related to long-term operating leases 51 43
Net effect of changes in operating accounts (706) (682)
Other operating activities 1 0
Net cash flows provided by operating activities 5,203 5,314
Investing activities:    
Capital expenditures (2,254) (1,203)
Cash used for business combinations, net of cash received 0 (3,204)
Investments in unconsolidated affiliates (2) (1)
Distributions received from unconsolidated affiliates attributable to the return of capital 37 82
Proceeds from asset sales and other matters 7 20
Other investing activities (8) (3)
Cash used in investing activities (2,220) (4,309)
Financing activities:    
Borrowings under debt agreements 57,685 64,482
Repayments of debt (57,062) (64,828)
Debt issuance costs (17) (1)
Monetization of interest rate derivative instruments 21 0
Cash distributions paid to common unitholders (3,215) (3,061)
Cash payments made in connection with distribution equivalent rights (29) (26)
Cash distributions paid to noncontrolling interests (121) (115)
Cash contributions from noncontrolling interests 25 4
Repurchase of common units under 2019 Buyback Program (92) (107)
Other financing activities (70) (63)
Cash used in financing activities (2,875) (3,715)
Net change in cash and cash equivalents, including restricted cash 108 (2,710)
Cash and cash equivalents, including restricted cash, at beginning of period 206 2,965
Cash and cash equivalents, including restricted cash, at end of period $ 314 $ 255