SUBSEQUENT EVENTS (Details) - SJI - Senior Notes - USD ($)	Sep. 15, 2022	Jul. 14, 2022
Forecast
Subsequent Event [Line Items]
Long-term debt, gross	$ 200,000,000
Subsequent Event
Subsequent Event [Line Items]
Debt instrument, face amount		$ 400,000,000
Debt instrument, percent of notes issued		50.00%
Long-term debt, gross		$ 200,000,000
Subsequent Event | Series 2022A Notes
Subsequent Event [Line Items]
Debt instrument, face amount		100,000,000
Long-term debt, gross		$ 50,000,000
Stated interest rate		5.35%
Subsequent Event | Series 2022B Notes
Subsequent Event [Line Items]
Debt instrument, face amount		$ 100,000,000
Long-term debt, gross		$ 50,000,000
Stated interest rate		5.44%
Subsequent Event | Series 2022C Notes
Subsequent Event [Line Items]
Debt instrument, face amount		$ 120,000,000
Long-term debt, gross		$ 60,000,000
Stated interest rate		5.60%
Subsequent Event | Series 2022D Notes
Subsequent Event [Line Items]
Debt instrument, face amount		$ 80,000,000
Long-term debt, gross		$ 40,000,000
Stated interest rate		5.60%