COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 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	$ 65
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	19
Sempra Infrastructure | Liquefied Natural Gas Contracts
Loss Contingencies [Line Items]
Change in 2022	4
Change in 2023	155
Change in 2024	85
Change in 2025	95
Change in 2026	112
Change thereafter	$ 355