Condensed Consolidated Statements of Income (Unaudited) - GAS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating Revenues:
Total operating revenues	$ 6,480	$ 6,648
Operating Expenses:
Other operations and maintenance	1,482	1,516
Depreciation and amortization	1,111	892
Taxes other than income taxes	394	372
Gain on dispositions, net	(42)	(23)
Total operating expenses	5,262	5,264
Operating Income	1,218	1,384
Other Income and (Expense):
Earnings from equity method investments	48	46
Interest expense, net of amounts capitalized	(582)	(462)
Other income (expense), net	147	145
Total other income and (expense)	(322)	(220)
Earnings Before Income Taxes	896	1,164
Income taxes (benefit)	97	173
Net Income	799	991
Retail electric revenues
Operating Revenues:
Total operating revenues	3,599	3,613
Wholesale Electric
Operating Revenues:
Total operating revenues	599	664
Other electric revenues
Operating Revenues:
Total operating revenues	190	177
Natural Gas
Operating Revenues:
Total operating revenues	1,875	2,058
Natural gas
Operating Expenses:
Total cost of sales	898	1,095
Alternative revenue programs
Operating Revenues:
Total operating revenues	12	0
Other revenues
Operating Revenues:
Total operating revenues	217	136
Operating Expenses:
Total cost of sales	127	69
SOUTHERN Co GAS
Operating Revenues:
Total operating revenues	$ 1,875	$ 2,058
Operating Expenses:
Cost, Product and Service [Extensible Enumeration]	Natural gas	Natural gas
Other operations and maintenance	$ 305	$ 305
Depreciation and amortization	141	137
Taxes other than income taxes	102	100
Total operating expenses	1,446	1,637
Operating Income	429	421
Other Income and (Expense):
Earnings from equity method investments	45	40
Interest expense, net of amounts capitalized	(76)	(61)
Other income (expense), net	14	16
Total other income and (expense)	(17)	(5)
Earnings Before Income Taxes	412	416
Income taxes (benefit)	103	97
Net Income	309	319
SOUTHERN Co GAS | Natural gas
Operating Revenues:
Total operating revenues	1,875	2,058
Operating Expenses:
Total cost of sales	$ 898	$ 1,095