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SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - OTHER INCOME (EXPENSE), NET (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Other Income [Line Items] |  |  |
Allowance for equity funds used during construction | $ 140 | $ 143 | $ 133
Investment gains (losses), net | 28 | (42) | 50
Gains (losses) on interest rate and foreign exchange instruments, net | 4 | 11 | (28)
Foreign currency transaction gains (losses), net | 2 | (24) | (18)
Non-service components of net periodic benefit cost | (106) | (59) | (67)
Interest on regulatory balancing accounts, net | 79 | 26 | 6
Sundry, net | (16) | (31) | (18)
Total | 131 | 24 | 58
SDG&E |  |  |
Other Income [Line Items] |  |  |
Allowance for equity funds used during construction | 86 | 88 | 81
Non-service components of net periodic benefit cost | (19) | (11) | (13)
Interest on regulatory balancing accounts, net | 42 | 18 | 6
Sundry, net | (12) | (3) | (10)
Total | 97 | 92 | 64
SoCalGas |  |  |
Other Income [Line Items] |  |  |
Allowance for equity funds used during construction | 54 | 55 | 48
Non-service components of net periodic benefit cost | (80) | (42) | (40)
Interest on regulatory balancing accounts, net | 37 | 8 | 0
Sundry, net | (15) | (29) | (22)
Total | $ (4) | (8) | (14)
IMG JV |  |  |
Other Income [Line Items] |  |  |
Foreign currency transaction gains (losses), net |  | $ (11) | $ (23)

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