Revenue from Contracts with Customers - EEGH (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Revenue from External Customer [Line Items]
Operating revenue	$ 6,346	$ 6,030
EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	551	488
Other revenue	2	(6)
Operating revenue	553	482
Contract liability	70		$ 80
Contract liability, revenue recognized	22
Regulated | EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	334	285
Nonregulated | EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	217	203
Gas transmission and storage | Regulated
Revenue from External Customer [Line Items]
Total Customer Revenue	392	388
Gas transmission and storage | Regulated | EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	332	285
Other | Regulated
Revenue from External Customer [Line Items]
Total Customer Revenue	34	22
Other | Regulated | EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	$ 2	$ 0