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REGULATORY ASSETS, LIABILITIES, AND BALANCING ACCOUNTS (Long-Term Regulatory Assets) (Details) - USD ($) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2022 | Jun. 30, 2022 | Feb. 28, 2022 | Dec. 31, 2021
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 16,443 |  |  | $ 9,207
Utility retained generation asset costs | 1,200 |  |  |
Customer Harm Threshold, post-emergence transaction, recovery bonds issued |  |  | $ 7,500 |
Initial shareholder contribution | 2,000 |  |  |
Pension benefits |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 120 |  |  | 708
Environmental compliance costs |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 1,193 |  |  | 1,089
Recovery Period | 32 years |  |  |
Utility retained generation |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 86 |  |  | 133
Recovery Period | 4 years |  |  |
Price risk management |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 177 |  |  | 216
Recovery Period | 17 years |  |  |
Catastrophic event memorandum account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 1,085 |  |  | 1,119
Catastrophic event memorandum account | COVID-19 |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 44 |  |  | 49
Catastrophic event memorandum account | Minimum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Recovery Period | 1 year |  |  |
Catastrophic event memorandum account | Maximum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Recovery Period | 3 years |  |  |
Wildfire expense memorandum account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 439 |  |  | 347
Fire hazard prevention memorandum account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 79 |  |  | 75
Fire hazard prevention memorandum account | Minimum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Recovery Period | 1 year |  |  |
Fire hazard prevention memorandum account | Maximum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Recovery Period | 3 years |  |  |
Fire risk mitigation memorandum account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 65 |  |  | 44
Fire risk mitigation memorandum account | Minimum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Recovery Period | 1 year |  |  |
Fire risk mitigation memorandum account | Maximum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Recovery Period | 3 years |  |  |
Wildfire mitigation plan memorandum account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 756 |  |  | 424
Wildfire mitigation plan memorandum account | Minimum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Recovery Period | 1 year |  |  |
Wildfire mitigation plan memorandum account | Maximum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Recovery Period | 3 years |  |  |
Deferred income taxes |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 2,730 |  |  | 1,849
Recovery Period | 51 years |  |  |
Insurance premium costs |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 99 |  |  | 207
Insurance premium costs | Minimum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Recovery Period | 2 years |  |  |
Insurance premium costs | Maximum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Recovery Period | 4 years |  |  |
Wildfire mitigation balancing account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 327 |  |  | 273
Wildfire mitigation balancing account | Minimum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Recovery Period | 1 year |  |  |
Cost percentage threshold requiring approval | 115.00% |  |  |
Wildfire mitigation balancing account | Maximum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Recovery Period | 3 years |  |  |
Vegetation management balancing account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 2,276 |  |  | 1,411
Cost percentage threshold requiring approval | 120.00% |  |  |
Vegetation management balancing account | Minimum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Recovery Period | 1 year |  |  |
Vegetation management balancing account | Maximum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Recovery Period | 3 years |  |  |
COVID-19 Pandemic protection memorandum account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 26 |  |  | 49
COVID-19 pandemic protection memorandum account, undercollection bad debt |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 4 |  |  | 30
COVID-19 pandemic protection memorandum account, program and accounts receivable financing costs |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 22 |  |  | 19
Microgrid memorandum account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 213 |  |  | 163
Microgrid memorandum account | Minimum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Recovery Period | 1 year |  |  |
Microgrid memorandum account | Maximum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Recovery Period | 3 years |  |  |
Financing costs |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 211 |  |  | 175
SB 901 Securitization |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 5,378 | $ 5,500 |  | 0
Recovery Period | 30 years |  |  |
Recoveries in excess of AROs |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 120 |  |  | 0
Other |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 1,063 |  |  | $ 925

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