COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS & ENVIRONMENTAL ISSUES (Details) $ in Millions	9 Months Ended
	Sep. 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	$ 51
Sempra Infrastructure | Natural Gas Contracts And Transportation Commitments
Loss Contingencies [Line Items]
Increase (decrease) in unrecorded unconditional purchase obligation	474
Increase (decrease) in unrecorded unconditional purchase obligation, remainder of fiscal year	(17)
Increase (decrease) in unrecorded unconditional purchase obligation, year one	4
Increase (decrease) in unrecorded unconditional purchase obligation, year two	76
Increase (decrease) in unrecorded unconditional purchase obligation, year three	98
Increase (decrease) in unrecorded unconditional purchase obligation, year four	98
Increase (decrease) in unrecorded unconditional purchase obligation, after four years	215
Sempra Infrastructure | Liquefied Natural Gas Contracts
Loss Contingencies [Line Items]
Increase (decrease) in unrecorded unconditional purchase obligation, remainder of fiscal year	(321)
Increase (decrease) in unrecorded unconditional purchase obligation, year one	(76)
Increase (decrease) in unrecorded unconditional purchase obligation, year two	(51)
Increase (decrease) in unrecorded unconditional purchase obligation, year three	(37)
Increase (decrease) in unrecorded unconditional purchase obligation, year four	(45)
Increase (decrease) in unrecorded unconditional purchase obligation, after four years	(30)
SDG&E
Loss Contingencies [Line Items]
Environmental cost, potential monetary sanctions threshold, actual amount	18
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	340
Increase (decrease) in unrecorded unconditional purchase obligation, remainder of fiscal year	(7)
Increase (decrease) in unrecorded unconditional purchase obligation, year one	36
Increase (decrease) in unrecorded unconditional purchase obligation, year two	111
Increase (decrease) in unrecorded unconditional purchase obligation, year three	119
Increase (decrease) in unrecorded unconditional purchase obligation, year four	$ 81