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GENERAL INFORMATION AND OTHER FINANCIAL DATA - OTHER INCOME, NET (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Other Income [Line Items] |  |  |  |
Allowance for equity funds used during construction | $ 37 | $ 34 | $ 70 | $ 69
Investment gains (losses), net | 5 | (34) | 17 | (47)
(Losses) gains on interest rate and foreign exchange instruments, net | (1) | (1) | 4 | 5
Foreign currency transaction gains (losses), net | 3 | (3) | 4 | (22)
Non-service components of net periodic benefit cost | (26) | (9) | (51) | 32
Interest on regulatory balancing accounts, net | 19 | 4 | 37 | 5
Sundry, net | (6) | 8 | (9) | (5)
Total | 31 | (1) | 72 | 37
San Diego Gas and Electric Company |  |  |  |
Other Income [Line Items] |  |  |  |
Allowance for equity funds used during construction | 23 | 21 | 46 | 42
Non-service components of net periodic benefit cost | (5) | (2) | (9) | 9
Interest on regulatory balancing accounts, net | 11 | 3 | 21 | 4
Sundry, net | (7) | 0 | (8) | 1
Total | 22 | 22 | 50 | 56
Southern California Gas Company |  |  |  |
Other Income [Line Items] |  |  |  |
Allowance for equity funds used during construction | 14 | 13 | 24 | 26
Non-service components of net periodic benefit cost | (19) | (6) | (38) | 26
Interest on regulatory balancing accounts, net | 8 | 1 | 16 | 1
Sundry, net | (2) | (4) | (9) | (15)
Total | $ 1 | $ 4 | $ (7) | 38
IMG |  |  |  |
Other Income [Line Items] |  |  |  |
Foreign currency transaction gains (losses), net |  |  |  | $ (11)

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