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UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Operating activities:    
Net income $ 1,422 $ 1,331
Reconciliation of net income to net cash flows provided by operating activities:    
Depreciation and accretion 454 440
Amortization of intangible assets 46 41
Amortization of major maintenance costs for reaction-based plants 14 12
Other amortization expense 53 58
Impairment of assets other than goodwill 13 14
Equity in income of unconsolidated affiliates (104) (117)
Distributions received from unconsolidated affiliates attributable to earnings 104 109
Net losses (gains) attributable to asset sales and related matters (2) 2
Deferred income tax expense 3 9
Change in fair market value of derivative instruments 3 42
Non-cash expense related to long-term operating leases 16 13
Net effect of changes in operating accounts (439) 191
Net cash flows provided by operating activities 1,583 2,145
Investing activities:    
Capital expenditures (653) (349)
Cash used for business combinations, net of cash received 0 (3,204)
Distributions received from unconsolidated affiliates attributable to the return of capital 15 11
Proceeds from asset sales and other matters 2 11
Other investing activities (1) (1)
Cash used in investing activities (637) (3,532)
Financing activities:    
Borrowings under debt agreements 8,321 13,444
Repayments of debt (8,018) (13,464)
Debt issuance costs (17) 0
Monetization of interest rate derivative instruments 21 0
Cash distributions paid to common unitholders (1,064) (1,012)
Cash payments made in connection with distribution equivalent rights (9) (8)
Cash distributions paid to noncontrolling interests (42) (42)
Cash contributions from noncontrolling interests 4 2
Repurchase of common units under 2019 Buyback Program (17) 0
Other financing activities (55) (45)
Cash used in financing activities (876) (1,125)
Net change in cash and cash equivalents, including restricted cash 70 (2,512)
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 $ 276 $ 453