STATEMENTS OF CONSOLIDATED CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating activities:
Net income	$ 5,970	$ 5,657	$ 5,615
Reconciliation of net income to net cash flow provided by operating activities:
Depreciation and accretion	1,987	1,871	1,797
Amortization of intangible assets	207	201	177
Amortization of major maintenance costs for reaction-based plants	59	64	51
Other amortization expense	220	207	220
Impairment of assets other than goodwill	57	32	53
Equity in income of unconsolidated affiliates	(408)	(462)	(464)
Distributions received from unconsolidated affiliates attributable to earnings	406	446	446
Net losses (gains) attributable to asset sales and related matters	2	(10)	1
Deferred income tax expense	45	12	60
Change in fair market value of derivative instruments	(20)	33	78
Non-cash expense related to long-term operating leases	95	72	59
Net effect of changes in operating accounts	(506)	(555)	(54)
Other operating activities	1	1	0
Net cash flow provided by operating activities	8,115	7,569	8,039
Investing activities:
Capital expenditures	(4,544)	(3,266)	(1,964)
Cash used for business combinations, net of cash received	(949)	0	(3,204)
Investments in unconsolidated affiliates	0	(2)	(1)
Distributions received from unconsolidated affiliates attributable to the return of capital	77	42	98
Proceeds from asset sales and other matters	14	42	122
Other investing activities	(31)	(13)	(5)
Net cash flow used in investing activities	(5,433)	(3,197)	(4,954)
Financing activities:
Borrowings under debt agreements	53,715	89,899	96,140
Repayments of debt	(50,546)	(89,447)	(97,395)
Debt issuance costs	(44)	(17)	(1)
Monetization of interest rate derivative instruments	(33)	21	0
Cash distributions paid to common unitholders	(4,512)	(4,301)	(4,095)
Cash payments made in connection with distribution equivalent rights	(43)	(38)	(34)
Cash distributions paid to noncontrolling interests	(106)	(160)	(163)
Cash contributions from noncontrolling interests	90	44	7
Repurchase of common units under 2019 Buyback Program	(219)	(188)	(250)
Acquisition of noncontrolling interests	(400)	(10)	0
Other financing activities	(66)	(61)	(53)
Net cash flow used in financing activities	(2,164)	(4,258)	(5,844)
Net change in cash and cash equivalents, including restricted cash	518	114	(2,759)
Cash and cash equivalents, including restricted cash, at beginning of period	320	206	2,965
Cash and cash equivalents, including restricted cash, at end of period	$ 838	$ 320	$ 206