REVENUE - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenues from alternative revenue programs	$ (2.9)	$ 1.0	$ (9.0)	$ 2.1
South Jersey Gas Company
Disaggregation of Revenue [Line Items]
Total revenues from alternative revenue programs	$ (1.0)	$ 0.6	$ (6.8)	$ (0.1)