CONTINGENCIES, COMMITMENTS, AND GUARANTEES (Tables)

12 Months Ended

Dec. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Schedule of regulatory assets and liabilities

At December 31, 2021 and 2020, 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. At December 31, 2021 and 2020, Alabama Power did not have environmental remediation liabilities and Mississippi Power's balance was immaterial.

	Southern Company		Georgia Power		Southern Company Gas
	(in millions)
December 31, 2021:
Environmental remediation liability:
Other current liabilities	$	69	$	17	$	52
Accrued environmental remediation	197		—		197
Under recovered environmental remediation costs:
Other regulatory assets, current	$	71	$	12	$	59
Other regulatory assets, deferred	231		23		208
December 31, 2020:
Environmental remediation liability:
Other current liabilities	$	44	$	15	$	29
Accrued environmental remediation	216		—		216
Under recovered environmental remediation costs:
Other regulatory assets, current	$	46	$	12	$	34
Other regulatory assets, deferred	265		29		236

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, 2021 were as follows:

	Pipeline Charges, Storage Capacity, and Gas Supply
	(in millions)
2022	$	634
2023	455
2024	376
2025	275
2026	164
Thereafter	910
Total	$	2,814