Segment Disclosures Reconciliation of Segment Modified EBITDA to Consolidated Net Income (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Reconciliation of Modified EBITDA to Net Income (Loss):
Modified EBITDA Earnings (Loss)		$ 1,667	$ 1,247	$ 3,797	$ 2,640
Accretion expense associated with asset retirement obligations for nonregulated operations		(14)	(13)	(29)	(24)
Depreciation and amortization expenses		(515)	(506)	(1,021)	(1,004)
Equity earnings (losses)		160	163	307	299
Other investing income (loss) - net		13	2	21	3
Proportional Modified EBITDA of equity-method investments		(249)	(250)	(478)	(475)
Interest expense		(306)	(281)	(600)	(567)
(Provision) benefit for income taxes		(175)	45	(459)	(73)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest		(87)	0	(87)	0
Net income (loss)		494	407	1,451	799
Inventory write-downs		5	12	23	12
Energy Related Derivative | Not Designated as Hedging Instrument [Member] | Cost of Sales
Reconciliation of Modified EBITDA to Net Income (Loss):
Unrealized Gain (Loss) on Derivatives		(29)	9	(34)	11
Gas & NGL Marketing Services | Energy Related Derivative | Not Designated as Hedging Instrument [Member] | Cost of Sales
Reconciliation of Modified EBITDA to Net Income (Loss):
Unrealized Gain (Loss) on Derivatives		(29)	9	(34)	11
Operating Segments [Member] | Transmission And Gulf Of Mexico [Member]
Reconciliation of Modified EBITDA to Net Income (Loss):
Modified EBITDA Earnings (Loss)		731	652	1,446	1,349
Operating Segments [Member] | Northeast G And P [Member]
Reconciliation of Modified EBITDA to Net Income (Loss):
Modified EBITDA Earnings (Loss)		515	450	985	868
Operating Segments [Member] | West [Member]
Reconciliation of Modified EBITDA to Net Income (Loss):
Modified EBITDA Earnings (Loss)		312	288	616	548
Operating Segments [Member] | Gas & NGL Marketing Services
Reconciliation of Modified EBITDA to Net Income (Loss):
Modified EBITDA Earnings (Loss)	[1]	68	(282)	635	(269)
Operating Segments [Member] | Other [Member]
Reconciliation of Modified EBITDA to Net Income (Loss):
Modified EBITDA Earnings (Loss)		$ 41	$ 139	$ 115	$ 144

[1] Modified EBITDA for the three and six months ended June 30, 2023 and 2022, includes charges of $5 million and $23 million, and $12 million and $12 million, respectively, associated with lower of cost or net realizable value adjustments to our inventory. These charges are reflected in Product sales and Product costs in our Consolidated Statement of Income. Net unrealized commodity-related derivative gains (losses) of $(29) million and $(34) million, and $9 million and $11 million for the three and six months ended June 30, 2023 and 2022, respectively, are reflected in Net processing commodity expenses.