Statements of Income - APC - 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
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
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
Dividends on preferred stock of subsidiaries	15	15	15
Consolidated Net Income	2,393	3,119	4,739
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 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
Alabama Power
Operating Revenues:
Total operating revenues	6,413	5,830	6,125
Operating Expenses:
Other operations and maintenance	1,735	1,619	1,821
Depreciation and amortization	859	812	793
Taxes other than income taxes	410	416	403
Total operating expenses	4,607	4,136	4,532
Operating Income	1,806	1,694	1,593
Other Income and (Expense):
Allowance for equity funds used during construction	52	46	52
Interest expense, net of amounts capitalized	(340)	(338)	(336)
Other income (expense), net	107	100	46
Total other income and (expense)	(181)	(192)	(238)
Earnings Before Income Taxes	1,625	1,502	1,355
Income taxes (benefit)	372	337	270
Net Income (Loss)	1,253	1,165	1,085
Dividends on preferred stock of subsidiaries	15	15	15
Consolidated Net Income	1,238	1,150	1,070
Alabama Power | Retail electric revenues
Operating Revenues:
Total operating revenues	5,499	5,213	5,501
Alabama Power | Wholesale revenues
Operating Revenues:
Total operating revenues	377	269	258
Alabama Power | Wholesale revenues, affiliates
Operating Revenues:
Total operating revenues	171	46	81
Alabama Power | Other revenues
Operating Revenues:
Total operating revenues	366	302	285
Alabama Power | Fuel
Operating Expenses:
Cost of sales	1,235	970	1,112
Alabama Power | Purchased power
Operating Expenses:
Cost of sales	221	191	203
Alabama Power | Purchased power, affiliates
Operating Expenses:
Cost of sales	$ 147	$ 128	$ 200