COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Loss Contingencies [Line Items]
Potential monetary sanctions threshold	$ 1
Potential monetary sanctions threshold (as a percent)	1.00%
Environmental cost, potential monetary sanctions threshold, actual amount	$ 52
Sempra Infrastructure | Natural Gas Storage and Transportation Contracts
Loss Contingencies [Line Items]
Change since 2022	321
Change in 2023	(35)
Change in 2024	2
Change thereafter	354
Sempra Infrastructure | Liquefied Natural Gas Contracts
Loss Contingencies [Line Items]
Change in 2023	(660)
Change in 2024	40
Change in 2025	78
Change in 2026	62
Change in 2027	44
Change thereafter	36
San Diego Gas and Electric Company
Loss Contingencies [Line Items]
Environmental cost, potential monetary sanctions threshold, actual amount	18
Southern California Gas Company
Loss Contingencies [Line Items]
Environmental cost, potential monetary sanctions threshold, actual amount	$ 20