UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating activities:
Net income	$ 1,483	$ 1,422
Reconciliation of net income to net cash flows provided by operating activities:
Depreciation and accretion	488	454
Amortization of intangible assets	50	46
Amortization of major maintenance costs for reaction-based plants	13	14
Other amortization expense	65	53
Impairment of assets other than goodwill	20	13
Equity in income of unconsolidated affiliates	(102)	(104)
Distributions received from unconsolidated affiliates attributable to earnings	97	104
Net gains attributable to asset sales and related matters	0	(2)
Deferred income tax expense	9	3
Change in fair market value of derivative instruments	4	3
Non-cash expense related to long-term operating leases	20	16
Net effect of changes in operating accounts	(36)	(439)
Net cash flows provided by operating activities	2,111	1,583
Investing activities:
Capital expenditures	(1,047)	(653)
Distributions received from unconsolidated affiliates attributable to the return of capital	15	15
Proceeds from asset sales and other matters	2	2
Other investing activities	(8)	(1)
Cash used in investing activities	(1,038)	(637)
Financing activities:
Borrowings under debt agreements	14,328	8,321
Repayments of debt	(13,632)	(8,018)
Debt issuance costs	(18)	(17)
Monetization of interest rate derivative instruments	(29)	21
Cash distributions paid to common unitholders	(1,117)	(1,064)
Cash payments made in connection with distribution equivalent rights	(10)	(9)
Cash distributions paid to noncontrolling interests	(38)	(42)
Cash contributions from noncontrolling interests	8	4
Repurchase of common units under 2019 Buyback Program	(40)	(17)
Acquisition of noncontrolling interests	(400)	0
Other financing activities	(61)	(55)
Cash used in financing activities	(1,009)	(876)
Net change in cash and cash equivalents, including restricted cash	64	70
Cash and cash equivalents, including restricted cash, at beginning of period	320	206
Cash and cash equivalents, including restricted cash, at end of period	$ 384	$ 276