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REGULATORY ASSETS, LIABILITIES, AND BALANCING ACCOUNTS (Long-Term Regulatory Assets) (Details) - USD ($) $ in Millions | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2022 | Jun. 30, 2022 | Feb. 28, 2022 | Dec. 31, 2021
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 16,448 |  |  | $ 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 | 519 |  |  | 708
Environmental compliance costs |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 1,190 |  |  | 1,089
Utility retained generation |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 98 |  |  | 133
Price risk management |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 151 |  |  | 216
Catastrophic event memorandum account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 998 |  |  | 1,119
Catastrophic event memorandum account | COVID-19 |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 40 |  |  | 49
Wildfire expense memorandum account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 417 |  |  | 347
Fire hazard prevention memorandum account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 77 |  |  | 75
Fire risk mitigation memorandum account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 122 |  |  | 44
Wildfire mitigation plan memorandum account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 623 |  |  | 424
Deferred income taxes |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 2,527 |  |  | 1,849
Insurance premium costs |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 168 |  |  | 207
Wildfire mitigation balancing account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 301 |  |  | 273
Wildfire mitigation balancing account | Minimum |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Cost percentage threshold requiring approval | 115.00% |  |  |
Vegetation management balancing account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 1,994 |  |  | 1,411
Cost percentage threshold requiring approval | 120.00% |  |  |
COVID-19 Pandemic protection memorandum account |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 32 |  |  | 49
COVID-19 pandemic protection memorandum account, undercollection bad debt |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 10 |  |  | 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 | 192 |  |  | 163
Financing costs |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 207 |  |  | 175
SB 901 Securitization |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 5,439 | $ 5,500 |  | 0
Recoveries in excess of AROs |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | 369 |  |  | 0
Other |  |  |  |
Regulatory Assets [Line Items] |  |  |  |
Regulatory assets | $ 1,024 |  |  | $ 925

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