Consolidated Statements of Income - Southern - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Revenues:
Total operating revenues	$ 23,113	$ 20,375	$ 21,419
Operating Expenses:
Other operations and maintenance	6,088	5,413	5,624
Depreciation and amortization	3,565	3,518	3,038
Taxes other than income taxes	1,290	1,234	1,230
Estimated loss on Plant Vogtle Units 3 and 4	1,692		0
Impairment charges	2	0	168
Gain on dispositions, net	(186)	(65)	(2,569)
Total operating expenses	19,415	15,490	13,683
Operating Income	3,698	4,885	7,736
Other Income and (Expense):
Allowance for equity funds used during construction	190	149	128
Earnings from equity method investments	76	153	162
Interest expense, net of amounts capitalized	(1,837)	(1,821)	(1,736)
Impairment of leveraged leases	(7)	(206)	0
Other income (expense), net	456	336	252
Total other income and (expense)	(1,122)	(1,389)	(1,194)
Earnings Before Income Taxes	2,576	3,496	6,542
Income taxes (benefit)	267	393	1,798
Net Income	2,309	3,103	4,744
Dividends on preferred stock of subsidiaries	15	15	15
Net loss attributable to noncontrolling interests	(99)	(31)	(10)
Consolidated Net Income	$ 2,393	$ 3,119	$ 4,739
Earnings per share —
Basic (in dollars per share)	$ 2.26	$ 2.95	$ 4.53
Diluted (in dollars per share)	$ 2.24	$ 2.93	$ 4.50
Average number of shares of common stock outstanding — (in millions)
Basic (in shares)	1,061	1,058	1,046
Diluted (in shares)	1,068	1,065	1,054
Retail electric revenues
Operating Revenues:
Total operating revenues	$ 14,852	$ 13,643	$ 14,084
Wholesale revenues
Operating Revenues:
Total operating revenues	2,455	1,945	2,152
Other electric revenues
Operating Revenues:
Total operating revenues	718	672	636
Natural gas
Operating Revenues:
Total operating revenues	4,380	3,434	3,792
Operating Expenses:
Cost of sales	1,619	972	1,319
Other revenues
Operating Revenues:
Total operating revenues	708	681	755
Operating Expenses:
Cost of sales	357	327	435
Fuel
Operating Expenses:
Cost of sales	4,010	2,967	3,622
Purchased power
Operating Expenses:
Cost of sales	$ 978	$ 799	$ 816