CONTINGENCIES, COMMITMENTS, AND GUARANTEES (Tables)

12 Months Ended

Dec. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Schedule of regulatory assets and liabilities

At December 31, 2023 and 2022, the environmental remediation liability and the balance of under recovered environmental remediation costs were reflected in the balance sheets of Southern Company, Georgia Power, and Southern Company Gas as shown in the table below. Alabama Power and Mississippi Power did not have environmental remediation liabilities at December 31, 2023 or 2022.

	Southern Company		Georgia Power		Southern Company Gas
	(in millions)
December 31, 2023:
Environmental remediation liability:
Other current liabilities	$	44	$	14	$	30
Accrued environmental remediation	192		—		192
Under recovered environmental remediation costs:
Other regulatory assets, current	$	45	$	5	$	40
Other regulatory assets, deferred	210		15		195
December 31, 2022:
Environmental remediation liability:
Other current liabilities	$	65	$	15	$	49
Accrued environmental remediation	207		—		207
Under recovered environmental remediation costs:
Other regulatory assets, current	$	59	$	5	$	54
Other regulatory assets, deferred	235		20		215

Expected future contractual obligations

Southern Company Gas' expected future contractual obligations for pipeline charges, storage capacity, and gas supply that are not recognized on the balance sheets at December 31, 2023 were as follows:

	Pipeline Charges, Storage Capacity, and Gas Supply
	(in millions)
2024	$	587
2025	432
2026	231
2027	148
2028	103
Thereafter	785
Total	$	2,286