CONTINGENCIES, COMMITMENTS, AND GUARANTEES (Tables)

12 Months Ended

Dec. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Schedule of regulatory assets and liabilities

At December 31, 2019 and 2018, the environmental remediation liability and the balance of under recovered environmental remediation costs were reflected in the balance sheets as follows:

	Southern Company		Georgia Power		Southern Company Gas
	(in millions)
December 31, 2019:
Environmental remediation liability:
Other current liabilities	$	51	$	15	$	36
Accrued environmental remediation	234		—		233
Under recovered environmental remediation costs:
Other regulatory assets, current	$	49	$	12	$	37
Other regulatory assets, deferred	300		40		260
December 31, 2018:
Environmental remediation liability:
Other current liabilities	$	49	$	23	$	26
Accrued environmental remediation	268		—		268
Under recovered environmental remediation costs:
Other regulatory assets, current	$	21	$	2	$	19
Other regulatory assets, deferred	345		53		292

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, 2019 were as follows:

	Pipeline Charges, Storage Capacity, and Gas Supply
	(in millions)
2020	$	725
2021	559
2022	526
2023	454
2024	330
2025 and thereafter	1,677
Total	$	4,271