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GENERAL INFORMATION AND OTHER FINANCIAL DATA - OTHER INCOME, NET (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Other Income [Line Items] |  |  |  |
Allowance for equity funds used during construction | $ 35 | $ 35 | $ 105 | $ 104
Investment gains (losses), net | (19) | (13) | (2) | (60)
Gains (losses) on interest rate and foreign exchange instruments, net | 1 | (3) | 5 | 2
Foreign currency transaction gains (losses), net | (3) | 4 | 1 | (18)
Non-service components of net periodic benefit cost | (28) | (77) | (79) | (45)
Interest on regulatory balancing accounts, net | 19 | 7 | 56 | 12
Sundry, net | (2) | 7 | (11) | 2
Total | 3 | (40) | 75 | (3)
San Diego Gas and Electric Company |  |  |  |
Other Income [Line Items] |  |  |  |
Allowance for equity funds used during construction | 21 | 22 | 67 | 64
Non-service components of net periodic benefit cost | (5) | (17) | (14) | (8)
Interest on regulatory balancing accounts, net | 10 | 5 | 31 | 9
Sundry, net | (1) | 2 | (9) | 3
Total | 25 | 12 | 75 | 68
Southern California Gas Company |  |  |  |
Other Income [Line Items] |  |  |  |
Allowance for equity funds used during construction | 14 | 14 | 38 | 40
Non-service components of net periodic benefit cost | (22) | (58) | (60) | (32)
Interest on regulatory balancing accounts, net | 9 | 2 | 25 | 3
Sundry, net | (3) | (1) | (12) | (16)
Total | $ (2) | $ (43) | $ (9) | (5)
IMG |  |  |  |
Other Income [Line Items] |  |  |  |
Foreign currency transaction gains (losses), net |  |  |  | $ 11

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