COMMITMENTS AND CONTINGENCIES - OTHER COMMITMENTS (Details)	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2011 USD ($) MMcf
Sunrise Powerlink Construction [Member] | SDG&E [Member]
Loss Contingencies [Line Items]
Expected payment	$ 4,000,000
Expected payment, due in second year	4,000,000
Expected payment, due in third year	4,000,000
Expected payment, due in fourth year	4,000,000
Expected payment, due in fifth year	4,000,000
Expected payment, thereafter	$ 282,000,000
Estimated annual escalation	2.00%
Purchase commitment period	50 years
Present value of future payments	$ 121,000,000
Continental Forge [Member] | Sempra LNG [Member]
Loss Contingencies [Line Items]
Purchase commitment period		18 years
Amount o natural gas to be sold (MMcf per day) | MMcf		500
Price index		$ 0.02