Supplemental Cash Flow Disclosures - EEGH (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,096	$ 1,290
Restricted cash and cash equivalents	127	140
Total cash and cash equivalents and restricted cash and cash equivalents	1,244	1,445	$ 1,268	$ 883
Interest paid, net of amounts capitalized	2,041	1,855	1,723
Income taxes received, net	(1,309)	(1,361)	(850)
Supplemental disclosure of non-cash investing and financing transactions:
Accrued capital expenditures	834	801	888
EEGH
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	22	35
Restricted cash and cash equivalents	17	13
Total cash and cash equivalents and restricted cash and cash equivalents	39	48	39	$ 198
Interest paid, net of amounts capitalized	144	317	291
Income taxes received, net	(60)	31	65
Supplemental disclosure of non-cash investing and financing transactions:
Accrued capital expenditures	42	30	25
Equity distributions	(137)	0	0
Equity contributions	73	0	0
Distribution of Questar Pipeline Group	0	(699)	0
Distribution of 50% interest in Cove Point	0	(2,765)	0
Acquisition of Eastern Energy Gas by BHE	$ 0	$ 343	$ 0