Revenue from Contracts with Customers - EEGH (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Revenue from External Customer [Line Items]
Operating revenue	$ 6,111	$ 6,346
EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	533	551
Other revenue	0	2
Operating revenue	533	553
Contract liability	38		$ 40
Contract liability, revenue recognized	11	22
Regulated | EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	330	334
Nonregulated | EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	203	217
Gas transmission and storage | Regulated
Revenue from External Customer [Line Items]
Total Customer Revenue	339	392
Gas transmission and storage | Regulated | EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	329	332
Other customer revenue | Regulated
Revenue from External Customer [Line Items]
Total Customer Revenue	27	34
Other customer revenue | Regulated | EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	$ 1	$ 2