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GENERAL INFORMATION AND OTHER FINANCIAL DATA - PENSION AND OTHER POSTRETIREMENT BENEFITS (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Pension |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost | $ 32 | $ 28
Interest cost | 42 | 40
Expected return on assets | (45) | (43)
Amortization of: |  |
Prior service [cost (credit)] | 1 | 1
Actuarial [loss (gain)] | 3 | 2
Net periodic benefit [cost (credit)] | 33 | 28
Regulatory adjustments | (25) | 29
Total expense recognized | 8 | 57
Pension | SDG&E |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost | 10 | 8
Interest cost | 11 | 10
Expected return on assets | (12) | (10)
Amortization of: |  |
Actuarial [loss (gain)] | 2 | 1
Net periodic benefit [cost (credit)] | 11 | 9
Regulatory adjustments | (10) | 4
Total expense recognized | 1 | 13
Pension | SoCalGas |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost | 19 | 17
Interest cost | 26 | 25
Expected return on assets | (30) | (29)
Amortization of: |  |
Prior service [cost (credit)] | 1 | 1
Actuarial [loss (gain)] | 0 | 0
Net periodic benefit [cost (credit)] | 16 | 14
Regulatory adjustments | (15) | 25
Total expense recognized | 1 | 39
PBOP |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost | 4 | 4
Interest cost | 9 | 9
Expected return on assets | (17) | (17)
Amortization of: |  |
Prior service [cost (credit)] | (1) | (1)
Actuarial [loss (gain)] | (4) | (6)
Net periodic benefit [cost (credit)] | (9) | (11)
Regulatory adjustments | 9 | 11
Total expense recognized | 0 | 0
PBOP | SDG&E |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost | 1 | 1
Interest cost | 2 | 2
Expected return on assets | (3) | (2)
Amortization of: |  |
Actuarial [loss (gain)] | 0 | (1)
Net periodic benefit [cost (credit)] | 0 | 0
Regulatory adjustments | 0 | 0
Total expense recognized | 0 | 0
PBOP | SoCalGas |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost | 3 | 3
Interest cost | 7 | 7
Expected return on assets | (15) | (15)
Amortization of: |  |
Prior service [cost (credit)] | (1) | (1)
Actuarial [loss (gain)] | (3) | (5)
Net periodic benefit [cost (credit)] | (9) | (11)
Regulatory adjustments | 9 | 11
Total expense recognized | $ 0 | $ 0

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