REGULATORY MATTERS - GAS Schedule of Utility Regulation and Rate Design (Details)			1 Months Ended	12 Months Ended
	Nov. 16, 2023	Aug. 28, 2023	Nov. 30, 2021	Dec. 31, 2023	Dec. 31, 2021
Nicor Gas
Public Utilities, General Disclosures [Line Items]
Authorized ROE	9.51%		9.75%	9.51%
Atlanta Gas Light
Public Utilities, General Disclosures [Line Items]
Authorized ROE				10.25%
Virginia Natural Gas
Public Utilities, General Disclosures [Line Items]
Authorized ROE		9.70%		9.70%	9.50%
Chattanooga Gas
Public Utilities, General Disclosures [Line Items]
Authorized ROE				9.80%