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EMPLOYEE BENEFIT PLANS - OBLIGATIONS OF FUNDED AND UNFUNDED PENSION AND PBOP PLANS (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Pension Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Accumulated benefit obligation | $ 2,865 | $ 2,574
Pension Plan | SDG&E |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Accumulated benefit obligation | 769 | 678
Pension Plan | SoCalGas |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Accumulated benefit obligation | 1,799 | 1,644
Funded Plan | Pension Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Projected benefit obligation | 2,925 | 2,476
Accumulated benefit obligation | 2,712 | 2,277
Fair value of plan assets | 2,664 | 2,205
Funded Plan | Pension Plan | SDG&E |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Projected benefit obligation | 781 | 691
Accumulated benefit obligation | 746 | 658
Fair value of plan assets | 726 | 670
Funded Plan | Pension Plan | SoCalGas |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Projected benefit obligation | 1,944 | 1,785
Accumulated benefit obligation | 1,771 | 1,619
Fair value of plan assets | 1,744 | 1,535
Unfunded Plan | Pension Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Projected benefit obligation | 182 | 153
Accumulated benefit obligation | 153 | 124
Unfunded Plan | Pension Plan | SDG&E |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Projected benefit obligation | 26 | 23
Accumulated benefit obligation | 23 | 20
Unfunded Plan | Pension Plan | SoCalGas |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Projected benefit obligation | 33 | 29
Accumulated benefit obligation | 28 | 25
Unfunded Plan | Other Postretirement Benefits Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Accumulated benefit obligation | $ 9 | $ 10

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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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