Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating revenue:
Total operating revenue	$ 25,150	$ 20,952	$ 19,844
Energy:
Cost of fuel and energy	5,504	4,187	4,586
Operations and maintenance	3,991	3,545	3,318
Depreciation and amortization	3,829	3,410	2,965
Property and other taxes	789	634	574
Real estate	5,710	4,885	4,251
Total operating expenses	19,823	16,661	15,694
Operating income	5,327	4,291	4,150
Other income (expense):
Interest expense	(2,118)	(2,021)	(1,912)
Capitalized interest	64	80	77
Allowance for equity funds	126	165	173
Interest and dividend income	89	71	117
Gains (losses) on marketable securities, net	1,823	4,797	(288)
Other, net	(17)	88	97
Total other income (expense)	(33)	3,180	(1,736)
Income (loss) before income tax expense (benefit) and equity income (loss)	5,294	7,471	2,414
Income tax (benefit) expense	(1,132)	308	(598)
Equity income (loss)	(237)	(149)	(44)
Net income	6,189	7,014	2,968
Net income attributable to noncontrolling interests	399	71	18
Net income (loss) attributable to parent	5,790	6,943	2,950
Preferred dividends	121	26	0
Earnings on common shares	5,669	6,917	2,950
Energy
Operating revenue:
Total operating revenue	18,935	15,556	15,371
Real estate
Operating revenue:
Total operating revenue	$ 6,215	$ 5,396	$ 4,473