Revenue from Contracts with Customers - EEGH (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue from External Customer [Line Items]
Total Customer Revenue	$ 4,745	$ 4,199	$ 9,464	$ 8,911
Operating revenue	6,612	6,064	12,642	12,145
EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	502	436	990	922
Operating revenue	504	437	986	923
Regulated
Revenue from External Customer [Line Items]
Total Customer Revenue	3,989	3,587	8,104	7,681
Regulated | EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	286	246	571	542
Nonregulated | EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	216	190	419	380
Gas transportation and storage | Regulated
Revenue from External Customer [Line Items]
Total Customer Revenue	164	109	552	607
Gas transportation and storage | Regulated | EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	286	246	571	525
Wholesale | Regulated
Revenue from External Customer [Line Items]
Total Customer Revenue	187	108	423	301
Wholesale | Regulated | EEGH
Revenue from External Customer [Line Items]
Total Customer Revenue	0	0	0	17
Other revenue
Revenue from External Customer [Line Items]
Operating revenue	195	102	299	239
Other revenue | EEGH
Revenue from External Customer [Line Items]
Operating revenue	$ 2	$ 1	$ (4)	$ 1