Consolidated Statements of Income - USD ($) $ 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
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):
Interest expense, net of amounts capitalized	(1,837)	(1,821)	(1,736)
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 (Loss)	2,309	3,103	4,744
Net loss attributable to noncontrolling interests	(99)	(31)	(10)
Consolidated Net Income	2,393	3,119	4,739
Wholesale revenues
Operating Revenues:
Total operating revenues	2,455	1,945	2,152
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
Southern Power
Operating Revenues:
Total operating revenues	2,216	1,733	1,938
Operating Expenses:
Other operations and maintenance	423	353	362
Depreciation and amortization	517	494	479
Taxes other than income taxes	45	39	40
Loss on sales-type leases	40	0	0
Gain on dispositions, net	(41)	(39)	(23)
Total operating expenses	1,925	1,391	1,543
Operating Income	291	342	395
Other Income and (Expense):
Interest expense, net of amounts capitalized	(147)	(151)	(169)
Other income (expense), net	10	19	47
Total other income and (expense)	(137)	(132)	(122)
Earnings Before Income Taxes	154	210	273
Income taxes (benefit)	(13)	3	(56)
Net Income (Loss)	167	207	329
Net loss attributable to noncontrolling interests	(99)	(31)	(10)
Consolidated Net Income	266	238	339
Southern Power | Wholesale revenues
Operating Revenues:
Total operating revenues	1,671	1,355	1,528
Southern Power | Other revenues
Operating Revenues:
Total operating revenues	30	14	12
Southern Power | Fuel
Operating Expenses:
Cost of sales	802	470	577
Southern Power | Purchased power
Operating Expenses:
Cost of sales	$ 139	$ 74	$ 108