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SB 901 SECURITIZATION AND CUSTOMER CREDIT TRUST (Tables) | 3 Months Ended
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Mar. 31, 2024
Debt Disclosure [Abstract] |
Schedule of Financial Statement Impact of Securitization | The following tables illustrate the changes in the SB 901 securitization’s impact on the Utility’s regulatory assets and liabilities:
| SB 901 securitization regulatory asset
(in millions) | 2024 |  | 2023
Balance at January 1 | $ | 5,249 |  |  | $ | 5,378 |
Amortization | (2) |  |  | (49) |
Balance at March 31 | $ | 5,247 |  |  | $ | 5,329 |
| SB 901 securitization regulatory liability |
(in millions) | 2024 |  | 2023 |
Balance at January 1 | $ | (6,628) |  |  | $ | (5,800) |  |
Amortization | 82 |  |  | 136 |
Additions(1) | (4) |  |  | (273) |  |
Balance at March 31 | $ | (6,550) |  |  | $ | (5,937) |  |
(1) Includes $4 million and $0 million of expected returns on investments in the customer credit trust to be credited to customers for the three months ended March 31, 2024 and March 31, 2023, respectively.

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