Consolidated Entities and Equity Method Investments (Tables)

9 Months Ended

Sep. 30, 2021

Regulated Operations [Abstract]

Schedule of Equity Method Investments

The carrying amounts of Southern Company Gas' equity method investments at September 30, 2021 and December 31, 2020 and related earnings (loss) from those investments for the three and nine months ended September 30, 2021 and 2020 were as follows:

Investment Balance	September 30, 2021		December 31, 2020
	(in millions)
SNG	$	1,130	$	1,167
PennEast Pipeline(*)	11		91
Other	33		32
Total	$	1,174	$	1,290

(*)Investment balance at September 30, 2021 reflects pre-tax impairment charges totaling $84 million recorded during 2021. See Note (C) under "Other Matters – Southern Company Gas" for additional information, including the September 2021 cancellation of the project.

Schedule of Earnings (Loss) from Equity Method Investments

	Three Months Ended September 30,				Nine Months Ended September 30,
Earnings (Loss) from Equity Method Investments	2021		2020		2021		2020
	(in millions)
SNG	$	27	$	30	$	93	$	95
PennEast Pipeline(a)(b)	(2)		2		(81)		5
Other(a)(c)	—		1		2		6
Total	$	25	$	33	$	14	$	106

(a)Earnings primarily result from AFUDC equity recorded by the project entity.

(b)Includes pre-tax impairment charges totaling $2 million and $84 million for the three and nine months ended September 30, 2021, respectively. See Note (C) under "Other Matters – Southern Company Gas" for additional information, including the September 2021 cancellation of the project.

(c)On March 24, 2020, Southern Company Gas completed the sale of its interests in Atlantic Coast Pipeline and Pivotal LNG. See Note 15 to the financial statements under "Southern Company Gas" in Item 8 of the Form 10-K for additional information.