COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS (Details) - USD ($) $ in Millions		9 Months Ended
	Jun. 08, 2021	Sep. 30, 2021
Sempra LNG [Member] | Liquefied Natural Gas Contracts [Member]
Loss Contingencies [Line Items]
Change in 2021		$ (277)
Change in 2022		496
Change in 2023		279
Change in 2024		197
Change in 2025		153
Change thereafter		499
San Diego Gas and Electric Company [Member]
Loss Contingencies [Line Items]
Potential monetary sanctions threshold, actual amount		17
San Diego Gas and Electric Company [Member] | Natural Gas and Electric Franchise
Loss Contingencies [Line Items]
Principle payments	$ 110
Other Commitments, Interest Payments	$ 13
Other Commitments, Payments		11
Other Commitment, to be Paid, Year One		14
Other Commitment, to be Paid, Year Two		14
Other Commitment, to be Paid, Year Three		14
Other Commitment, to be Paid, Year Four		14
Other Commitment, to be Paid, Year Five		15
Other Commitment, to be Paid, after Year Five		55
Sempra Energy [Member]
Loss Contingencies [Line Items]
Potential monetary sanctions threshold, actual amount		46
Southern California Gas Company [Member]
Loss Contingencies [Line Items]
Potential monetary sanctions threshold, actual amount		$ 15