Segment Disclosures Reconciliation of Segment Revenues to Consolidated (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment revenues
Revenues		$ 3,021	$ 2,475	$ 8,035	$ 7,370
Intersegment Elimination [Member]
Segment revenues
Revenues		(342)	(390)	(1,093)	(912)
Operating Segments [Member] | Transmission And Gulf Of Mexico [Member]
Segment revenues
Revenues		1,043	937	3,040	2,749
Operating Segments [Member] | Northeast G And P [Member]
Segment revenues
Revenues		459	417	1,330	1,209
Operating Segments [Member] | West [Member]
Segment revenues
Revenues		708	531	1,957	1,450
Operating Segments [Member] | Gas & NGL Marketing Services
Segment revenues
Revenues	[1]	938	882	2,351	2,661
Operating Segments [Member] | Other [Member]
Segment revenues
Revenues		215	98	450	213
Service [Member]
Segment revenues
Revenues		1,685	1,506	4,828	4,418
Service [Member] | Transmission And Gulf Of Mexico [Member]
Segment revenues
Revenues		880	812	2,563	2,445
Service [Member] | Northeast G And P [Member]
Segment revenues
Revenues		408	390	1,178	1,101
Service [Member] | West [Member]
Segment revenues
Revenues		393	300	1,073	857
Service [Member] | Gas & NGL Marketing Services
Segment revenues
Revenues	[1]	1	0	2	2
Service [Member] | Other [Member]
Segment revenues
Revenues		3	4	12	13
Service [Member] | Intersegment Elimination [Member]
Segment revenues
Revenues		(74)	(57)	(194)	(138)
Service [Member] | Intersegment Elimination [Member] | Transmission And Gulf Of Mexico [Member]
Segment revenues
Revenues		(30)	(24)	(88)	(48)
Service [Member] | Intersegment Elimination [Member] | Northeast G And P [Member]
Segment revenues
Revenues		(9)	(9)	(30)	(29)
Service [Member] | Intersegment Elimination [Member] | West [Member]
Segment revenues
Revenues		(32)	(20)	(66)	(51)
Service [Member] | Intersegment Elimination [Member] | Gas & NGL Marketing Services
Segment revenues
Revenues	[1]	0	0	0	0
Service [Member] | Intersegment Elimination [Member] | Other [Member]
Segment revenues
Revenues		(3)	(4)	(10)	(10)
Service [Member] | Operating Segments [Member] | Transmission And Gulf Of Mexico [Member]
Segment revenues
Revenues		910	836	2,651	2,493
Service [Member] | Operating Segments [Member] | Northeast G And P [Member]
Segment revenues
Revenues		417	399	1,208	1,130
Service [Member] | Operating Segments [Member] | West [Member]
Segment revenues
Revenues		425	320	1,139	908
Service [Member] | Operating Segments [Member] | Gas & NGL Marketing Services
Segment revenues
Revenues	[1]	1	0	2	2
Service [Member] | Operating Segments [Member] | Other [Member]
Segment revenues
Revenues		6	8	22	23
NonRegulated Service Commodity Consideration [Member]
Segment revenues
Revenues		60	64	223	164
NonRegulated Service Commodity Consideration [Member] | Intersegment Elimination [Member]
Segment revenues
Revenues		0	0	0	0
NonRegulated Service Commodity Consideration [Member] | Operating Segments [Member] | Transmission And Gulf Of Mexico [Member]
Segment revenues
Revenues		11	13	54	34
NonRegulated Service Commodity Consideration [Member] | Operating Segments [Member] | Northeast G And P [Member]
Segment revenues
Revenues		2	(1)	12	4
NonRegulated Service Commodity Consideration [Member] | Operating Segments [Member] | West [Member]
Segment revenues
Revenues		47	52	157	126
NonRegulated Service Commodity Consideration [Member] | Operating Segments [Member] | Gas & NGL Marketing Services
Segment revenues
Revenues	[1]	0	0	0	0
NonRegulated Service Commodity Consideration [Member] | Operating Segments [Member] | Other [Member]
Segment revenues
Revenues		0	0	0	0
Product [Member]
Segment revenues
Revenues		1,260	1,296	3,475	3,229
Product [Member] | Transmission And Gulf Of Mexico [Member]
Segment revenues
Revenues		78	54	187	141
Product [Member] | Northeast G And P [Member]
Segment revenues
Revenues		11	(1)	24	11
Product [Member] | West [Member]
Segment revenues
Revenues		61	13	111	43
Product [Member] | Gas & NGL Marketing Services
Segment revenues
Revenues	[1]	1,079	1,183	3,073	2,912
Product [Member] | Other [Member]
Segment revenues
Revenues		31	47	80	122
Product [Member] | Intersegment Elimination [Member]
Segment revenues
Revenues		(268)	(333)	(899)	(774)
Product [Member] | Intersegment Elimination [Member] | Transmission And Gulf Of Mexico [Member]
Segment revenues
Revenues		(43)	(34)	(147)	(81)
Product [Member] | Intersegment Elimination [Member] | Northeast G And P [Member]
Segment revenues
Revenues		(29)	(20)	(86)	(64)
Product [Member] | Intersegment Elimination [Member] | West [Member]
Segment revenues
Revenues		(184)	(164)	(573)	(398)
Product [Member] | Intersegment Elimination [Member] | Gas & NGL Marketing Services
Segment revenues
Revenues	[1]	195	(51)	349	(137)
Product [Member] | Intersegment Elimination [Member] | Other [Member]
Segment revenues
Revenues		(207)	(64)	(442)	(94)
Product [Member] | Operating Segments [Member] | Transmission And Gulf Of Mexico [Member]
Segment revenues
Revenues		121	88	334	222
Product [Member] | Operating Segments [Member] | Northeast G And P [Member]
Segment revenues
Revenues		40	19	110	75
Product [Member] | Operating Segments [Member] | West [Member]
Segment revenues
Revenues		245	177	684	441
Product [Member] | Operating Segments [Member] | Gas & NGL Marketing Services
Segment revenues
Revenues	[1]	884	1,234	2,724	3,049
Product [Member] | Operating Segments [Member] | Other [Member]
Segment revenues
Revenues		238	111	522	216
Energy Commodities and Service
Segment revenues
Revenues	[2]	16	(391)	(491)	(441)
Energy Commodities and Service | Realized Gain (Loss)
Segment revenues
Revenues		(13)	(82)	(145)	(124)
Energy Commodities and Service | Unrealized Gain (Loss)
Segment revenues
Revenues		29	(309)	(346)	(317)
Energy Commodities and Service | Transmission And Gulf Of Mexico [Member]
Segment revenues
Revenues	[2]	1	0	1	0
Energy Commodities and Service | Transmission And Gulf Of Mexico [Member] | Realized Gain (Loss)
Segment revenues
Revenues		0	0	0	0
Energy Commodities and Service | Transmission And Gulf Of Mexico [Member] | Unrealized Gain (Loss)
Segment revenues
Revenues		1	0	1	0
Energy Commodities and Service | Northeast G And P [Member]
Segment revenues
Revenues	[2]	0	0	0	0
Energy Commodities and Service | Northeast G And P [Member] | Realized Gain (Loss)
Segment revenues
Revenues		0	0	0	0
Energy Commodities and Service | Northeast G And P [Member] | Unrealized Gain (Loss)
Segment revenues
Revenues		0	0	0	0
Energy Commodities and Service | West [Member]
Segment revenues
Revenues	[2]	(9)	(18)	(23)	(25)
Energy Commodities and Service | West [Member] | Realized Gain (Loss)
Segment revenues
Revenues		(9)	(18)	(23)	(25)
Energy Commodities and Service | West [Member] | Unrealized Gain (Loss)
Segment revenues
Revenues		0	0	0	0
Energy Commodities and Service | Gas & NGL Marketing Services
Segment revenues
Revenues	[1],[2]	53	(352)	(375)	(390)
Energy Commodities and Service | Gas & NGL Marketing Services | Realized Gain (Loss)
Segment revenues
Revenues	[1]	54	(58)	(18)	(93)
Energy Commodities and Service | Gas & NGL Marketing Services | Unrealized Gain (Loss)
Segment revenues
Revenues	[1]	(1)	(294)	(357)	(297)
Energy Commodities and Service | Other [Member]
Segment revenues
Revenues	[2]	(29)	(21)	(94)	(26)
Energy Commodities and Service | Other [Member] | Realized Gain (Loss)
Segment revenues
Revenues		(58)	(6)	(104)	(6)
Energy Commodities and Service | Other [Member] | Unrealized Gain (Loss)
Segment revenues
Revenues		29	(15)	10	(20)
Energy Commodities and Service | Intersegment Elimination [Member]
Segment revenues
Revenues	[2]	0	0	0	0
Energy Commodities and Service | Intersegment Elimination [Member] | Realized Gain (Loss)
Segment revenues
Revenues		0	0	0	0
Energy Commodities and Service | Intersegment Elimination [Member] | Unrealized Gain (Loss)
Segment revenues
Revenues		$ 0	$ 0	$ 0	$ 0

[1] See Note 1 – General, Description of Business, and Basis of Presentation.

[2] We record transactions that qualify as derivatives at fair value with changes in fair value recognized in earnings in the period of change and characterized as unrealized gains or losses. Gains and losses on derivatives held for energy trading purposes are presented on a net basis in revenue.