EMPLOYEE BENEFIT PLANS - TARGET ASSET ALLOCATIONS FOR SEMPRA’S PENSION MASTER TRUST (Details)	Dec. 31, 2022
Return Seeking Assets | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Targeted plan asset allocations	34.00%
Return Seeking Assets | Pension Plan | San Diego Gas and Electric Company
Defined Benefit Plan Disclosure [Line Items]
Targeted plan asset allocations	42.00%
Return Seeking Assets | Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Targeted plan asset allocations	65.00%
Return Seeking Assets | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Targeted plan asset allocations	74.00%
Return Seeking Assets | Other Postretirement Benefits Plan | SDG&E and SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Targeted plan asset allocations	38.00%
Return Seeking Assets | Other Postretirement Benefits Plan | SDG&E and SoCalGas | Voluntary Employee Beneficiary Association Trust
Defined Benefit Plan Disclosure [Line Items]
Targeted plan asset allocations	30.00%
Risk Mitigating Assets | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Targeted plan asset allocations	66.00%
Risk Mitigating Assets | Pension Plan | San Diego Gas and Electric Company
Defined Benefit Plan Disclosure [Line Items]
Targeted plan asset allocations	58.00%
Risk Mitigating Assets | Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Targeted plan asset allocations	35.00%
Risk Mitigating Assets | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Targeted plan asset allocations	26.00%
Risk Mitigating Assets | Other Postretirement Benefits Plan | SDG&E and SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Targeted plan asset allocations	62.00%
Risk Mitigating Assets | Other Postretirement Benefits Plan | SDG&E and SoCalGas | Voluntary Employee Beneficiary Association Trust
Defined Benefit Plan Disclosure [Line Items]
Targeted plan asset allocations	70.00%