Condensed Consolidated Statements of Income (Unaudited) - GAS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Revenues:
Total operating revenues	$ 6,648	$ 5,910
Operating Expenses:
Other operations and maintenance	1,516	1,372
Depreciation and amortization	892	871
Taxes other than income taxes	372	345
Total operating expenses	5,264	4,312
Operating Income	1,384	1,598
Other Income and (Expense):
Earnings from equity method investments	46	45
Interest expense, net of amounts capitalized	(462)	(450)
Other income (expense), net	145	58
Total other income and (expense)	(220)	(301)
Earnings Before Income Taxes	1,164	1,297
Income taxes (benefit)	173	190
Consolidated Net Income	991	1,107
Retail electric revenues
Operating Revenues:
Total operating revenues	3,613	3,342
Wholesale Electric
Operating Revenues:
Total operating revenues	664	545
Other electric revenues
Operating Revenues:
Total operating revenues	177	170
Natural Gas
Operating Revenues:
Total operating revenues	2,058	1,694
Natural gas
Operating Expenses:
Less Gross Gas Costs	1,095	583
Alternative revenue programs
Operating Revenues:
Total operating revenues	0	2
Other revenues
Operating Revenues:
Total operating revenues	136	159
Operating Expenses:
Less Gross Gas Costs	69	82
SOUTHERN Co GAS
Operating Revenues:
Total operating revenues	$ 2,058	$ 1,694
Operating Expenses:
Cost, Product and Service [Extensible Enumeration]	Natural gas	Natural gas
Other operations and maintenance	$ 305	$ 299
Depreciation and amortization	137	130
Taxes other than income taxes	100	81
Total operating expenses	1,637	1,093
Operating Income	421	601
Other Income and (Expense):
Earnings from equity method investments	40	41
Interest expense, net of amounts capitalized	(61)	(60)
Other income (expense), net	16	(63)
Total other income and (expense)	(5)	(82)
Earnings Before Income Taxes	416	519
Income taxes (benefit)	97	121
Consolidated Net Income	319	398
SOUTHERN Co GAS | Natural gas
Operating Revenues:
Total operating revenues	2,058	1,692
Operating Expenses:
Less Gross Gas Costs	1,095	583
SOUTHERN Co GAS | Alternative revenue programs
Operating Revenues:
Total operating revenues	$ 0	$ 2