Segment Disclosures Recon from Modified EBITDA to Net Income (Loss) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Modified EBITDA to Net Income (Loss)
Modified EBITDA		$ 8,013	$ 6,075	$ 5,494
Accretion expense associated with asset retirement obligations for nonregulated operations		(59)	(51)	(45)
Depreciation and amortization expenses		(2,071)	(2,009)	(1,842)
Equity earnings (losses)		589	637	608
Other investing income (loss) – net		108	16	7
Proportional Modified EBITDA Equity Method Investments		(939)	(979)	(970)
Interest Expense		(1,236)	(1,147)	(1,179)
(Provision) benefit for income taxes		(1,005)	(425)	(511)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest		(97)	0	0
Net income (loss)		3,303	2,117	1,562
Operating Segments [Member]
Reconciliation of Modified EBITDA to Net Income (Loss)
Modified EBITDA		7,172	5,641	5,316
Operating Segments [Member] | Transmission And Gulf Of Mexico [Member]
Reconciliation of Modified EBITDA to Net Income (Loss)
Modified EBITDA		3,068	2,674	2,621
Proportional Modified EBITDA Equity Method Investments		(205)	(193)	(183)
Operating Segments [Member] | Northeast G And P [Member]
Reconciliation of Modified EBITDA to Net Income (Loss)
Modified EBITDA		1,916	1,796	1,712
Proportional Modified EBITDA Equity Method Investments		(574)	(654)	(682)
Operating Segments [Member] | West [Member]
Reconciliation of Modified EBITDA to Net Income (Loss)
Modified EBITDA		1,238	1,211	961
Proportional Modified EBITDA Equity Method Investments		(162)	(132)	(105)
Operating Segments [Member] | Gas & NGL Marketing Services
Reconciliation of Modified EBITDA to Net Income (Loss)
Modified EBITDA		950	(40)	22
Proportional Modified EBITDA Equity Method Investments	[1]	0	0	0
Operating Segments [Member] | Other [Member]
Reconciliation of Modified EBITDA to Net Income (Loss)
Proportional Modified EBITDA Equity Method Investments		2	0	0
Corporate, Non-Segment
Reconciliation of Modified EBITDA to Net Income (Loss)
Modified EBITDA		$ 841	$ 434	$ 178

[1] As we are acting as agent for natural gas marketing customers or engage in energy trading activities, the resulting revenues are presented net of the related costs of those activities.