COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS & ENVIRONMENTAL ISSUES (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 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	$ 56
Sempra Infrastructure | Liquefied Natural Gas Contracts
Loss Contingencies [Line Items]
Increase (decrease) in unrecorded unconditional purchase obligation, remainder of fiscal year	(144)
Increase (decrease) in unrecorded unconditional purchase obligation, year one	22
Increase (decrease) in unrecorded unconditional purchase obligation, year two	13
Increase (decrease) in unrecorded unconditional purchase obligation, year three	5
Increase (decrease) in unrecorded unconditional purchase obligation, year four	(4)
Increase (decrease) in unrecorded unconditional purchase obligation, after four years	(2)
SDG&E
Loss Contingencies [Line Items]
Environmental cost, potential monetary sanctions threshold, actual amount	20
SoCalGas
Loss Contingencies [Line Items]
Environmental cost, potential monetary sanctions threshold, actual amount	$ 25