COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS & ENVIRONMENTAL ISSUES (Details) $ in Millions	6 Months Ended
	Jun. 30, 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	$ 44
Sempra Infrastructure | Liquefied Natural Gas Contracts
Loss Contingencies [Line Items]
Increase (decrease) in unrecorded unconditional purchase obligation, remainder of fiscal year	(241)
Increase (decrease) in unrecorded unconditional purchase obligation, year one	22
Increase (decrease) in unrecorded unconditional purchase obligation, year two	47
Increase (decrease) in unrecorded unconditional purchase obligation, year three	37
Increase (decrease) in unrecorded unconditional purchase obligation, year four	14
Increase (decrease) in unrecorded unconditional purchase obligation, after four years	7
SDG&E
Loss Contingencies [Line Items]
Environmental cost, potential monetary sanctions threshold, actual amount	15
SoCalGas
Loss Contingencies [Line Items]
Environmental cost, potential monetary sanctions threshold, actual amount	20
SoCalGas | Natural Gas Contracts And Transportation Commitments
Loss Contingencies [Line Items]
Increase (decrease) in unrecorded unconditional purchase obligation	379
Increase (decrease) in unrecorded unconditional purchase obligation, remainder of fiscal year	(1)
Increase (decrease) in unrecorded unconditional purchase obligation, year one	43
Increase (decrease) in unrecorded unconditional purchase obligation, year two	123
Increase (decrease) in unrecorded unconditional purchase obligation, year three	128
Increase (decrease) in unrecorded unconditional purchase obligation, year four	$ 86