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GENERAL INFORMATION AND OTHER FINANCIAL DATA - PENSION AND OTHER POSTRETIREMENT BENEFITS (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Pension |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | $ 33 | $ 29 | $ 65 | $ 57
Interest cost | 41 | 39 | 83 | 79
Expected return on assets | (46) | (42) | (91) | (85)
Amortization of: |  |  |  |
Prior service cost | 2 | 1 | 3 | 2
Actuarial loss (gain) | 3 | 2 | 6 | 4
Settlement charges | 9 | 0 | 9 | 0
Net periodic benefit cost (credit) | 42 | 29 | 75 | 57
Regulatory adjustments | 26 | 29 | 1 | 58
Total expense recognized | 68 | 58 | 76 | 115
Pension | SDG&E |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | 9 | 8 | 19 | 16
Interest cost | 11 | 10 | 22 | 20
Expected return on assets | (11) | (10) | (23) | (20)
Amortization of: |  |  |  |
Actuarial loss (gain) | 1 | 1 | 3 | 2
Net periodic benefit cost (credit) | 10 | 9 | 21 | 18
Regulatory adjustments | 3 | 4 | (7) | 8
Total expense recognized | 13 | 13 | 14 | 26
Pension | SoCalGas |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | 19 | 17 | 38 | 34
Interest cost | 26 | 26 | 52 | 51
Expected return on assets | (31) | (31) | (61) | (60)
Amortization of: |  |  |  |
Prior service cost | 1 | 1 | 2 | 2
Actuarial loss (gain) | 0 | 0 | 0 | 0
Net periodic benefit cost (credit) | 15 | 13 | 31 | 27
Regulatory adjustments | 23 | 25 | 8 | 50
Total expense recognized | 38 | 38 | 39 | 77
PBOP |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | 3 | 3 | 7 | 7
Interest cost | 9 | 10 | 18 | 19
Expected return on assets | (17) | (18) | (34) | (35)
Amortization of: |  |  |  |
Prior service cost | 0 | 0 | (1) | (1)
Actuarial loss (gain) | (4) | (6) | (8) | (12)
Settlement charges | 0 | 0 | 0 | 0
Net periodic benefit cost (credit) | (9) | (11) | (18) | (22)
Regulatory adjustments | 9 | 11 | 18 | 22
Total expense recognized | 0 | 0 | 0 | 0
PBOP | SDG&E |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | 1 | 0 | 2 | 1
Interest cost | 1 | 2 | 3 | 4
Expected return on assets | (1) | (2) | (4) | (4)
Amortization of: |  |  |  |
Actuarial loss (gain) | (1) | 0 | (1) | (1)
Net periodic benefit cost (credit) | 0 | 0 | 0 | 0
Regulatory adjustments | 0 | 0 | 0 | 0
Total expense recognized | 0 | 0 | 0 | 0
PBOP | SoCalGas |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | 2 | 2 | 5 | 5
Interest cost | 7 | 7 | 14 | 14
Expected return on assets | (15) | (15) | (30) | (30)
Amortization of: |  |  |  |
Prior service cost | 0 | 0 | (1) | (1)
Actuarial loss (gain) | (3) | (5) | (6) | (10)
Net periodic benefit cost (credit) | (9) | (11) | (18) | (22)
Regulatory adjustments | 9 | 11 | 18 | 22
Total expense recognized | $ 0 | $ 0 | $ 0 | $ 0

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