Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating revenue:
Total operating revenue	$ 6,081	$ 4,527
Energy:
Cost of sales	1,569	1,038
Operations and maintenance	934	737
Depreciation and amortization	915	809
Property and other taxes	210	151
Real estate	1,120	873
Total operating expenses	4,748	3,608
Operating income	1,333	919
Other income (expense):
Interest expense	(530)	(483)
Capitalized interest	14	17
Allowance for equity funds	26	34
Interest and dividend income	21	20
(Losses) gains on marketable securities, net	(1,118)	27
Other, net	8	(27)
Total other income (expense)	(1,579)	(412)
Income before income tax expense (benefit) and equity income (loss)	(246)	507
Income tax benefit	(535)	(184)
Equity loss	(179)	(18)
Net income	110	673
Net income attributable to noncontrolling interests	106	3
Net income (loss) attributable to parent	4	670
Dividends, Preferred Stock	38	0
Undistributed Earnings (Loss) Available to Common Shareholders, Diluted	(34)	670
Electricity and natural gas [Member]
Operating revenue:
Total operating revenue	4,849	3,634
Residential real estate brokerage and mortgage businesses [Member]
Operating revenue:
Total operating revenue	$ 1,232	$ 893