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Reserve for Aliso Canyon costs.

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Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

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COMMITMENTS AND CONTINGENCIES - NARRATIVE (Details) £ in Millions, $ in Millions		1 Months Ended	3 Months Ended		4 Months Ended	12 Months Ended			48 Months Ended
	Apr. 30, 2024 claim plaintiff lawsuit	Sep. 30, 2021 USD ($) plaintiff lawsuit	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Feb. 11, 2016 well	Dec. 31, 2023 USD ($)	Dec. 31, 2023 GBP (£)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 claimant lawsuit	Aug. 31, 2023 Bcf	Mar. 31, 2021 lawsuit	Dec. 31, 2015 company
Loss Contingencies [Line Items]
Liability for legal proceedings			$ 57
Natural gas inventory level (in bcf) \| Bcf										68.6
Number of liquidating companies \| company												10
Equity earnings			348	$ 219
Sempra Infrastructure
Loss Contingencies [Line Items]
Number of lawsuits \| lawsuit											3
Number of claimants \| claimant									3
HMRC VAT Claim
Loss Contingencies [Line Items]
Damages awarded						$ 10	£ 7.9
RBS Sempra Commodities
Loss Contingencies [Line Items]
Equity earnings						$ 40
SoCalGas
Loss Contingencies [Line Items]
Liability for legal proceedings			31
Wells with gas leak \| well					1
SoCalGas \| Aliso Canyon Natural Gas Storage Facility Gas Leak
Loss Contingencies [Line Items]
Number of lawsuits \| lawsuit		390
Number of lawsuits \| plaintiff		36,000
Net book value of Aliso Canyon facility			1,000
SoCalGas \| Aliso Canyon Natural Gas Storage Facility Gas Leak \| Subsequent Event
Loss Contingencies [Line Items]
Number of lawsuits \| plaintiff	436
SoCalGas \| Individual Plaintiff Litigation \| Aliso Canyon Natural Gas Storage Facility Gas Leak
Loss Contingencies [Line Items]
Estimate of costs		$ 1,800
Percentage of plaintiffs agreeing to participate and submit releases (in percent)								99.00%
Payment of liquidating companies' costs								$ 1,790
SoCalGas \| Non-Settling Individual Plaintiffs \| Aliso Canyon Natural Gas Storage Facility Gas Leak \| Subsequent Event
Loss Contingencies [Line Items]
Number of lawsuits \| plaintiff	96
SDG&E
Loss Contingencies [Line Items]
Number of lawsuits \| lawsuit									2
Energy Future Holdings Corp. \| Subsequent Event
Loss Contingencies [Line Items]
Lawsuits pending \| lawsuit	0
Number of proof of claims \| claim	28,000
Deferred Credits and Other \| SoCalGas \| Aliso Canyon Natural Gas Storage Facility Gas Leak
Loss Contingencies [Line Items]
Payable related to natural gas leak			2
Other Current Liabilities [Member] \| SoCalGas \| Aliso Canyon Natural Gas Storage Facility Gas Leak
Loss Contingencies [Line Items]
Payable related to natural gas leak			$ 29