Loss Contingency, Acceptance Rate of Plaintiffs, Percent

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- Definition

Loss Contingency Accrual, Net of Tax

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- Definition

Loss Contingency, Number of Alleged Violations

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- Definition

Loss Contingency, Percentage of Plaintiffs Represented

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- Definition

Reserve for Aliso Canyon costs.

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- Definition

Insurance receivable for Aliso Canyon costs

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- Definition

Amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy.

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- Definition

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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of loss contingency liability.

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- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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- Definition

The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

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- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

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- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency.

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- Definition

Number of pending claims pertaining to a loss contingency.

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- Definition

Amount after accumulated amortization of finite-lived and indefinite-lived intangible assets classified as other.

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- Definition

The cash inflow from parent as a source of financing that is recorded as additional paid in capital.

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Amount of cash inflow for proceeds from settlement of insurance claim, classified as operating activities. Excludes insurance settlement classified as investing activities.

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- Definition

Period end book value of other property, plant and equipment (PPE) owned (but not classified elsewhere) by the public utility.

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Period end amount of property, plant and equipment (PPE) related to utility transmission owned by public utility.

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COMMITMENTS AND CONTINGENCIES - LEGAL PROCEEDINGS (Details)			1 Months Ended			4 Months Ended	9 Months Ended
	Nov. 02, 2021 USD ($)	Nov. 01, 2021 lawsuit plaintiff	Sep. 30, 2021 USD ($) lawsuit	Nov. 30, 2019 violation	Jan. 31, 2017 lawsuit	Jan. 31, 2019 plaintiff	Sep. 30, 2021 USD ($) lawsuit	Sep. 30, 2020 USD ($)	Sep. 27, 2021 USD ($)	Sep. 26, 2021 USD ($)	Mar. 31, 2020 USD ($)
Loss Contingencies [Line Items]
Liability for legal proceedings			$ 2,076,000,000				$ 2,076,000,000
Number of alleged violations \| violation				324
Guaymas-El Oro Segment, Sonora Pipeline [Member]
Loss Contingencies [Line Items]
Net book value of pipeline			436,000,000				436,000,000
Consolidated Class Action Complaints [Member]
Loss Contingencies [Line Items]
Number of lawsuits filed \| lawsuit					2
Property Class Action [Member]
Loss Contingencies [Line Items]
Number of lawsuits filed \| lawsuit					1
Southern California Gas Company [Member]
Loss Contingencies [Line Items]
Liability for legal proceedings			1,998,000,000				1,998,000,000
Insurance settlements receivable			1,279,000,000				1,279,000,000
Equity contribution from Sempra Energy			800,000,000				800,000,000	$ 0
Southern California Gas Company [Member] \| Aliso Canyon Natural Gas Storage Facility Gas Leak [Member]
Loss Contingencies [Line Items]
Liability for legal proceedings			1,973,000,000				1,973,000,000
Estimate of costs			3,199,000,000				3,199,000,000
Net book value of Aliso Canyon facility			863,000,000				863,000,000
Reserve for Aliso Canyon costs			1,976,000,000				1,976,000,000
Loss contingency accrual											$ 277,000,000
Receivable related to natural gas leak			$ 414,000,000				414,000,000
Insurance proceeds							$ 865,000,000
Southern California Gas Company [Member] \| Shareholder Derivative Complaint [Member]
Loss Contingencies [Line Items]
Number of lawsuits \| lawsuit			4				4
Southern California Gas Company [Member] \| Complaints Filed by Firefighters [Member] \| Aliso Canyon Natural Gas Storage Facility Gas Leak [Member]
Loss Contingencies [Line Items]
Number of plaintiffs \| plaintiff						51
Southern California Gas Company [Member] \| Individual Plaintiff Litigation \| Aliso Canyon Natural Gas Storage Facility Gas Leak [Member]
Loss Contingencies [Line Items]
Percentage of plaintiffs represented										80.00%
Estimate of costs										$ 1,800,000,000
Acceptance rate of plaintiffs (as a percent)										97.00%
Southern California Gas Company [Member] \| Property Class Action [Member] \| Aliso Canyon Natural Gas Storage Facility Gas Leak [Member]
Loss Contingencies [Line Items]
Estimate of costs										$ 40,000,000
Southern California Gas Company [Member] \| Business Class Action \| Aliso Canyon Natural Gas Storage Facility Gas Leak [Member]
Loss Contingencies [Line Items]
Estimate of costs									$ 100,000
Sempra Mexico [Member] \| Regulatory Actions by the Mexican Government
Loss Contingencies [Line Items]
Other intangible assets, net			$ 14,000,000				$ 14,000,000
Subsequent Event [Member] \| Southern California Gas Company [Member] \| Aliso Canyon Natural Gas Storage Facility Gas Leak [Member]
Loss Contingencies [Line Items]
Number of lawsuits \| lawsuit		416
Number of plaintiffs \| plaintiff		36,000
Subsequent Event [Member] \| Southern California Gas Company [Member] \| Proposition 65 Claims
Loss Contingencies [Line Items]
Payments for losses	$ 2,000,000
Insurance Receivable [Member] \| Southern California Gas Company [Member] \| Aliso Canyon Natural Gas Storage Facility Gas Leak [Member]
Loss Contingencies [Line Items]
Loss contingency accrual											177,000,000
Aliso Canyon Litigation and Regulatory Matters \| Southern California Gas Company [Member] \| Aliso Canyon Natural Gas Storage Facility Gas Leak [Member]
Loss Contingencies [Line Items]
Loss contingency accrual			1,570,000,000				1,570,000,000	27,000,000			100,000,000
Loss contingency accrual, after tax			$ 1,130,000,000				$ 1,130,000,000	$ 22,000,000			$ 72,000,000