COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS & ENVIRONMENTAL ISSUES (Details) $ in Millions	6 Months Ended
Jun. 30, 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	$ 48
Sempra Infrastructure \| Natural Gas Storage and Transportation Contracts
Loss Contingencies [Line Items]
Change since 2022	863
Change in 2023	(27)
Change in 2024	23
Change in 2025	33
Change in 2026	33
Change in 2027	30
Change thereafter	771
Sempra Infrastructure \| Liquefied Natural Gas Contracts
Loss Contingencies [Line Items]
Change in 2023	(841)
Change in 2024	(87)
Change in 2025	(65)
Change in 2026	(87)
Change in 2027	(98)
Change thereafter	(208)
San Diego Gas and Electric Company
Loss Contingencies [Line Items]
Environmental cost, potential monetary sanctions threshold, actual amount	17
Southern California Gas Company
Loss Contingencies [Line Items]
Environmental cost, potential monetary sanctions threshold, actual amount	$ 13

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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