Consolidated Entities and Equity Method Investments (Tables)

3 Months Ended

Mar. 31, 2024

Regulated Operations [Abstract]

Schedule of Equity Method Investments

The carrying amounts of Southern Company Gas' equity method investments at March 31, 2024 and December 31, 2023 and related earnings from those investments for the three months ended March 31, 2024 and 2023 were as follows:

Investment Balance	March 31, 2024		December 31, 2023
	(in millions)
SNG	$	1,227	$	1,202
Other	33		33
Total	$	1,260	$	1,235

Schedule of Earnings (Loss) from Equity Method Investments

	Three Months Ended March 31,
Earnings from Equity Method Investments	2024		2023
	(in millions)
SNG	$	44	$	44
Other	—		1
Total	$	44	$	45