Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 3,434	$ 3,627	$ 9,700	$ 9,557
Regulated Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	855	968	2,624	2,590
Other non-606 revenue	8	8	25	23
Revenue	863	976	2,649	2,613
Non-regulated revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	2,329	2,516	6,436	6,512
Other non-606 revenue	242	135	615	432
Revenue	2,571	2,651	7,051	6,944
Corporate Other And Other Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	(15)	(25)	(61)	(79)
Corporate Other And Other Eliminations [Member] | Regulated Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Other non-606 revenue	0	0	0	0
Revenue	0	0	0	0
Corporate Other And Other Eliminations [Member] | Non-regulated revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	(14)	(25)	(60)	(79)
Other non-606 revenue	(1)	0	(1)	0
Revenue	(15)	(25)	(61)	(79)
Renewables
Disaggregation of Revenue [Line Items]
Revenue	708	532	1,744	1,407
Renewables | Regulated Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Other non-606 revenue	0	0	0	0
Revenue	0	0	0	0
Renewables | Non-regulated revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	672	494	1,654	1,325
Other non-606 revenue	36	38	90	82
Revenue	708	532	1,744	1,407
Utilities
Disaggregation of Revenue [Line Items]
Revenue	880	994	2,703	2,674
Utilities | Regulated Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	855	968	2,624	2,590
Other non-606 revenue	8	8	25	23
Revenue	863	976	2,649	2,613
Utilities | Non-regulated revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	16	17	51	58
Other non-606 revenue	1	1	3	3
Revenue	17	18	54	61
Energy Infrastructure
Disaggregation of Revenue [Line Items]
Revenue	1,861	2,126	5,239	5,553
Energy Infrastructure | Regulated Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Other non-606 revenue	0	0	0	0
Revenue	0	0	0	0
Energy Infrastructure | Non-regulated revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,655	2,030	4,717	5,207
Other non-606 revenue	206	96	522	346
Revenue	1,861	2,126	5,239	5,553
New Energy Technologies
Disaggregation of Revenue [Line Items]
Revenue	0	0	75	2
New Energy Technologies | Regulated Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Other non-606 revenue	0	0	0	0
Revenue	0	0	0	0
New Energy Technologies | Non-regulated revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	74	1
Other non-606 revenue	0	0	1	1
Revenue	$ 0	$ 0	$ 75	$ 2