Revenue from Contracts with Customers and Lease Income (Tables)

3 Months Ended

Mar. 31, 2023

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

The following table disaggregates revenue from contracts with customers for the three months ended March 31, 2023 and 2022:

	Southern Company		Alabama Power		Georgia Power		Mississippi Power		Southern Power		Southern Company Gas
	(in millions)
Three Months Ended March 31, 2023
Operating revenues
Retail electric revenues
Residential	$	1,525	$	659	$	801	$	65	$	—	$	—
Commercial	1,251		430		753		68		—		—
Industrial	789		398		313		78		—		—
Other	27		3		22		2		—		—
Total retail electric revenues	3,592		1,490		1,889		213		—		—
Natural gas distribution revenues
Residential	896		—		—		—		—		896
Commercial	232		—		—		—		—		232
Transportation	319		—		—		—		—		319
Industrial	23		—		—		—		—		23
Other	117		—		—		—		—		117
Total natural gas distribution revenues	1,587		—		—		—		—		1,587
Wholesale electric revenues
PPA energy revenues	284		72		12		4		202		—
PPA capacity revenues	190		60		11		32		89		—
Non-PPA revenues	36		20		3		107		103		—
Total wholesale electric revenues	510		152		26		143		394		—
Other natural gas revenues
Gas marketing services	231		—		—		—		—		231
Other natural gas revenues	11		—		—		—		—		11
Total natural gas revenues	242		—		—		—		—		242
Other revenues	310		54		132		11		11		—
Total revenue from contracts with customers	6,241		1,696		2,047		367		405		1,829
Other revenue sources(*)	239		(49)		129		23		103		46
Total operating revenues	$	6,480	$	1,647	$	2,176	$	390	$	508	$	1,875

	Southern Company		Alabama Power		Georgia Power		Mississippi Power		Southern Power		Southern Company Gas
	(in millions)
Three Months Ended March 31, 2022
Operating revenues
Retail electric revenues
Residential	$	1,525	$	634	$	821	$	70	$	—	$	—
Commercial	1,178		375		738		65		—		—
Industrial	727		323		334		70		—		—
Other	26		4		20		2		—		—
Total retail electric revenues	3,456		1,336		1,913		207		—		—
Natural gas distribution revenues
Residential	1,016		—		—		—		—		1,016
Commercial	270		—		—		—		—		270
Transportation	337		—		—		—		—		337
Industrial	32		—		—		—		—		32
Other	129		—		—		—		—		129
Total natural gas distribution revenues	1,784		—		—		—		—		1,784
Wholesale electric revenues
PPA energy revenues	342		59		32		3		251		—
PPA capacity revenues	134		39		12		3		81		—
Non-PPA revenues	58		64		9		102		73		—
Total wholesale electric revenues	534		162		53		108		405		—
Other natural gas revenues
Gas marketing services	243		—		—		—		—		243
Other natural gas revenues	16		—		—		—		—		16
Total natural gas revenues	259		—		—		—		—		259
Other revenues	225		48		95		9		8		—
Total revenue from contracts with customers	6,258		1,546		2,061		324		413		2,043
Other revenue sources(*)	390		103		147		11		126		15
Total operating revenues	$	6,648	$	1,649	$	2,208	$	335	$	539	$	2,058

(*)Other revenue sources relate to revenues from customers accounted for as derivatives and leases, alternative revenue programs at Southern Company Gas, and cost recovery mechanisms and revenues that meet other scope exceptions for revenues from contracts with customers at the traditional electric operating companies.

Schedule of Contract Balances

The following table reflects the closing balances of receivables, contract assets, and contract liabilities related to revenues from contracts with customers at March 31, 2023 and December 31, 2022:

	Southern Company		Alabama Power		Georgia Power		Mississippi Power		Southern Power		Southern Company Gas
	(in millions)
Accounts Receivable
At March 31, 2023	$	2,433	$	622	$	672	$	79	$	119	$	853
At December 31, 2022	3,123		696		922		92		237		1,107
Contract Assets
At March 31, 2023	$	160	$	3	$	74	$	—	$	—	$	19
At December 31, 2022	156		2		89		—		—		—
Contract Liabilities
At March 31, 2023	$	61	$	2	$	14	$	1	$	1	$	—
At December 31, 2022	45		4		9		—		1		—

Schedule of Remaining Performance Obligations

Revenues from contracts with customers related to these performance obligations remaining at March 31, 2023 are expected to be recognized as follows:

	2023 (remaining)		2024		2025		2026		2027		Thereafter
	(in millions)
Southern Company	$	632	$	553	$	347	$	315	$	319	$	2,089
Alabama Power	17		7		6		—		—		—
Georgia Power	68		60		25		13		14		23
Southern Power	268		345		302		303		310		2,077
Southern Company Gas	15		29		—		—		—		—

Schedule of Lease Income

Lease income for the three months ended March 31, 2023 and 2022 is as follows:

	Southern Company		Alabama Power		Georgia Power		Mississippi Power		Southern Power		Southern Company Gas
	(in millions)
For the Three Months Ended March 31, 2023
Lease income - interest income on sales-type leases	$	6	$	—	$	—	$	4	$	2	$	—
Lease income - operating leases	49		18		7		1		21		9
Variable lease income	69		—		—		—		75		—
Total lease income	$	124	$	18	$	7	$	5	$	98	$	9
For the Three Months Ended March 31, 2022
Lease income - interest income on sales-type leases	$	6	$	—	$	—	$	4	$	2	$	—
Lease income - operating leases	51		20		8		—		21		9
Variable lease income	84		—		—		—		90		—
Total lease income	$	141	$	20	$	8	$	4	$	113	$	9