Consolidated Statements of Income - GAS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Revenues:
Total operating revenues	$ 29,279	$ 23,113	$ 20,375
Operating Expenses:
Other operations and maintenance	6,630	6,088	5,413
Depreciation and amortization	3,663	3,565	3,518
Taxes other than income taxes	1,411	1,290	1,234
Impairment charges	251	2	0
Gain on dispositions, net	(57)	(186)	(65)
Total operating expenses	23,909	19,415	15,490
Operating income (loss)	5,370	3,698	4,885
Other Income and (Expense):
Earnings from equity method investments	151	76	153
Interest expense, net of amounts capitalized	(2,022)	(1,837)	(1,821)
Other income (expense), net	500	456	336
Total other income and (expense)	(1,147)	(1,122)	(1,389)
Earnings Before Income Taxes	4,223	2,576	3,496
Income taxes (benefit)	795	267	393
Consolidated Net Income	3,524	2,393	3,119
Southern Company Gas
Operating Revenues:
Total operating revenues	5,962	4,380	3,434
Operating Expenses:
Cost of sales	3,004	1,619	972
Other operations and maintenance	1,176	1,072	966
Depreciation and amortization	559	536	500
Taxes other than income taxes	282	225	206
Impairment charges	131	0	0
Gain on dispositions, net	(4)	(127)	(22)
Total operating expenses	5,148	3,325	2,622
Operating income (loss)	814	1,055	812
Other Income and (Expense):
Earnings from equity method investments	148	50	141
Interest expense, net of amounts capitalized	(263)	(238)	(231)
Other income (expense), net	53	(53)	41
Total other income and (expense)	(62)	(241)	(49)
Earnings Before Income Taxes	752	814	763
Income taxes (benefit)	180	275	173
Consolidated Net Income	$ 572	$ 539	$ 590