UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Operating activities:
Net income	$ 1,406	$ 1,483
Reconciliation of net income to net cash flow provided by operating activities:
Depreciation and accretion	511	488
Amortization of intangible assets	52	50
Amortization of major maintenance costs for reaction-based plants	16	13
Other amortization expense	57	65
Impairment of assets other than goodwill	10	20
Equity in income of unconsolidated affiliates	(94)	(102)
Distributions received from unconsolidated affiliates attributable to earnings	88	97
Net gains attributable to asset sales and related matters	(2)	0
Deferred income tax expense	11	9
Change in fair market value of derivative instruments	42	4
Non-cash expense related to long-term operating leases	28	20
Net effect of changes in operating accounts	203	(36)
Other operating activities	(14)	0
Net cash flow provided by operating activities	2,314	2,111
Investing activities:
Capital expenditures	(1,062)	(1,047)
Distributions received from unconsolidated affiliates attributable to the return of capital	15	15
Proceeds from asset sales and other matters	4	2
Other investing activities	(4)	(8)
Net cash flow used in investing activities	(1,047)	(1,038)
Financing activities:
Borrowings under debt agreements	19,103	14,328
Repayments of debt	(19,423)	(13,632)
Debt issuance costs	(12)	(18)
Monetization of interest rate derivative instruments	0	(29)
Cash distributions paid to common unitholders	(1,159)	(1,117)
Cash payments made in connection with distribution equivalent rights	(11)	(10)
Cash distributions paid to noncontrolling interests	(13)	(38)
Cash contributions from noncontrolling interests	4	8
Repurchase of common units under 2019 Buyback Program	(60)	(40)
Acquisition of noncontrolling interests	0	(400)
Other financing activities	(80)	(61)
Net cash flow used in financing activities	(1,651)	(1,009)
Net change in cash and cash equivalents, including restricted cash	(384)	64
Cash and cash equivalents, including restricted cash, at beginning of period	838	320
Cash and cash equivalents, including restricted cash, at end of period	$ 454	$ 384