SUBSEQUENT EVENTS (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended
	Feb. 23, 2022	Feb. 28, 2022	Feb. 24, 2022	Nov. 30, 2019
ETG Utility Operations | New Jersey Board of Public Utilities
Subsequent Event [Line Items]
Approved rate increase (decrease)				$ 34.0
Subsequent Event | ETG Utility Operations | New Jersey Board of Public Utilities
Subsequent Event [Line Items]
Approved rate increase (decrease)		$ 72.9	$ 72.9
Subsequent Event | NJ Boardwalk Holdings LLC
Subsequent Event [Line Items]
Merger agreement, sale price per share (in dollars per share)	$ 36.00
Merger agreement, termination period	12 months
Merger agreement, contingent termination fee, payable	$ 140.0
Merger agreement, contingent termination fee, receivable	$ 255.0