Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating revenue:
Total operating revenue	$ 26,337	$ 25,150	$ 20,952
Energy:
Cost of fuel and energy	6,757	5,504	4,187
Operations and maintenance	4,217	3,991	3,545
Depreciation and amortization	4,230	3,829	3,410
Property and other taxes	775	789	634
Real estate	5,117	5,710	4,885
Total operating expenses	21,096	19,823	16,661
Operating income	5,241	5,327	4,291
Other income (expense):
Interest expense	(2,216)	(2,118)	(2,021)
Capitalized interest	76	64	80
Allowance for equity funds	167	126	165
Interest and dividend income	154	89	71
(Losses) gains on marketable securities, net	(2,002)	1,823	4,797
Other, net	(7)	(17)	88
Total other income (expense)	(3,828)	(33)	3,180
Income (loss) before income tax expense (benefit) and equity income (loss)	1,413	5,294	7,471
Income tax (benefit) expense	(1,916)	(1,132)	308
Equity income (loss)	(185)	(237)	(149)
Net income	3,144	6,189	7,014
Net income attributable to noncontrolling interests	423	399	71
Net income (loss) attributable to parent	2,721	5,790	6,943
Preferred dividends	46	121	26
Earnings on common shares	2,675	5,669	6,917
Energy
Operating revenue:
Total operating revenue	21,069	18,935	15,556
Real estate
Operating revenue:
Total operating revenue	$ 5,268	$ 6,215	$ 5,396