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EMPLOYEE BENEFIT PLANS - NET PERIODIC BENEFIT COST AND AMOUNTS RECOGNIZED IN OCI (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Pension Plan |  |  |
NET PERIODIC BENEFIT COST |  |  |
Service cost | $ 109 | $ 146 | $ 145
Interest cost | 157 | 118 | 112
Expected return on assets | (169) | (183) | (173)
Prior service cost (credit) | 5 | 10 | 11
Actuarial loss (gain) | 10 | 25 | 45
Settlement charges | 0 | 28 | 38
Net periodic benefit cost (credit) | 112 | 144 | 178
Regulatory adjustment | 117 | 84 | 57
Total expense (income) recognized | 229 | 228 | 235
CHANGES IN PLAN ASSETS AND BENEFIT OBLIGATIONS RECOGNIZED IN OCI |  |  |
Net loss (gain) | 42 | 12 | (5)
Prior service cost | 4 | 0 | 0
Amortization of actuarial (loss) gain | (5) | (8) | (8)
Amortization of prior service cost | (2) | (4) | (4)
Settlements | 0 | 0 | (7)
Total recognized in OCI | 39 | 0 | (24)
Total recognized in net periodic benefit cost and OCI | 268 | 228 | 211
Pension Plan | SDG&E |  |  |
NET PERIODIC BENEFIT COST |  |  |
Service cost | 32 | 37 | 35
Interest cost | 40 | 26 | 25
Expected return on assets | (39) | (46) | (50)
Prior service cost (credit) | 1 | 1 | 1
Actuarial loss (gain) | 4 | 1 | 2
Settlement charges | 0 | 14 | 6
Net periodic benefit cost (credit) | 38 | 33 | 19
Regulatory adjustment | 15 | 20 | 34
Total expense (income) recognized | 53 | 53 | 53
CHANGES IN PLAN ASSETS AND BENEFIT OBLIGATIONS RECOGNIZED IN OCI |  |  |
Net loss (gain) | 3 | (3) | 1
Amortization of actuarial (loss) gain | 0 | (1) | 0
Amortization of prior service cost | (1) | 0 | (1)
Total recognized in OCI | 2 | (4) | 0
Total recognized in net periodic benefit cost and OCI | 55 | 49 | 53
Pension Plan | SoCalGas |  |  |
NET PERIODIC BENEFIT COST |  |  |
Service cost | 65 | 96 | 97
Interest cost | 101 | 81 | 78
Expected return on assets | (119) | (126) | (113)
Prior service cost (credit) | 4 | 8 | 8
Actuarial loss (gain) | 1 | 18 | 36
Settlement charges | 0 | 14 | 25
Net periodic benefit cost (credit) | 52 | 91 | 131
Regulatory adjustment | 102 | 64 | 23
Total expense (income) recognized | 154 | 155 | 154
CHANGES IN PLAN ASSETS AND BENEFIT OBLIGATIONS RECOGNIZED IN OCI |  |  |
Net loss (gain) | 2 | (5) | 2
Amortization of actuarial (loss) gain | (1) | (2) | (1)
Amortization of prior service cost | (1) | (1) | (1)
Total recognized in OCI | 0 | (8) | 0
Total recognized in net periodic benefit cost and OCI | 154 | 147 | 154
Other Postretirement Benefits Plan |  |  |
NET PERIODIC BENEFIT COST |  |  |
Service cost | 13 | 23 | 23
Interest cost | 37 | 28 | 28
Expected return on assets | (69) | (64) | (61)
Prior service cost (credit) | (2) | (2) | (2)
Actuarial loss (gain) | (23) | (15) | (9)
Settlement charges | 0 | 0 | 0
Net periodic benefit cost (credit) | (44) | (30) | (21)
Regulatory adjustment | 43 | 30 | 21
Total expense (income) recognized | (1) | 0 | 0
CHANGES IN PLAN ASSETS AND BENEFIT OBLIGATIONS RECOGNIZED IN OCI |  |  |
Net loss (gain) | (2) | (4) | (4)
Prior service cost | 0 | 0 | 0
Amortization of actuarial (loss) gain | 2 | 1 | 0
Amortization of prior service cost | 0 | 0 | 0
Settlements | 0 | 0 | 0
Total recognized in OCI | 0 | (3) | (4)
Total recognized in net periodic benefit cost and OCI | (1) | (3) | (4)
Other Postretirement Benefits Plan | SDG&E |  |  |
NET PERIODIC BENEFIT COST |  |  |
Service cost | 3 | 5 | 5
Interest cost | 8 | 6 | 5
Expected return on assets | (8) | (10) | (10)
Prior service cost (credit) | 0 | 0 | 0
Actuarial loss (gain) | (2) | (2) | (2)
Settlement charges | 0 | 0 | 0
Net periodic benefit cost (credit) | 1 | (1) | (2)
Regulatory adjustment | 0 | 1 | 2
Total expense (income) recognized | 1 | 0 | 0
Other Postretirement Benefits Plan | SoCalGas |  |  |
NET PERIODIC BENEFIT COST |  |  |
Service cost | 9 | 17 | 17
Interest cost | 28 | 21 | 22
Expected return on assets | (59) | (53) | (48)
Prior service cost (credit) | (2) | (2) | (3)
Actuarial loss (gain) | (19) | (12) | (7)
Settlement charges | 0 | 0 | 0
Net periodic benefit cost (credit) | (43) | (29) | (19)
Regulatory adjustment | 43 | 29 | 19
Total expense (income) recognized | $ 0 | $ 0 | $ 0

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