Revenue from Contracts with Customers - EEGH (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Revenue from External Customer [Line Items]
Operating revenue	$ 6,229	$ 6,612	$ 12,575	$ 12,642
EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	519	502	1,070	990
Other revenue	2	2	4	(4)
Operating revenue	521	504	1,074	986
Contract liability	35		35		$ 80
Contract liability, revenue recognized			49
Regulated | EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	293	286	627	571
Nonregulated | EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	226	216	443	419
Gas transmission and storage | Regulated
Revenue from External Customer [Line Items]
Total Customer Revenue	133	164	525	552
Gas transmission and storage | Regulated | EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	294	286	626	571
Other | Regulated
Revenue from External Customer [Line Items]
Total Customer Revenue	23	28	57	50
Other | Regulated | EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	$ (1)	$ 0	$ 1	$ 0