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REGULATORY ASSETS, LIABILITIES, AND BALANCING ACCOUNTS (Long-Term Regulatory Assets) (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | $ 9,167 | $ 9,207
Utility retained generation asset costs | 1,200 |
Pension benefits |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | 645 | 708
Environmental compliance costs |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | 1,007 | 1,089
Utility retained generation |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | 121 | 133
Price risk management |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | 213 | 216
Catastrophic event memorandum account |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | 983 | 1,119
Catastrophic event memorandum account | COVID-19 |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | 51 | 49
Wildfire expense memorandum account |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | 350 | 347
Fire hazard prevention memorandum account |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | 75 | 75
Fire risk mitigation memorandum account |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | 50 | 44
Wildfire mitigation plan memorandum account |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | 461 | 424
Deferred income taxes |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | 2,036 | 1,849
Insurance premium costs |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | 186 | 207
Wildfire mitigation balancing account |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | $ 273 | 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] |  |
Total long-term regulatory assets | $ 1,412 | 1,411
Vegetation management balancing account | Minimum |  |
Regulatory Assets [Line Items] |  |
Cost percentage threshold requiring approval | 120.00% |
COVID-19 Pandemic protection memorandum account |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | $ 48 | 49
COVID-19 pandemic protection memorandum account, undercollection bad debt |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | 28 | 30
COVID-19 pandemic protection memorandum account, program and accounts receivable financing costs |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | 20 | 19
Microgrid memorandum account |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | 164 | 163
Financing costs |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | 172 | 175
Other |  |
Regulatory Assets [Line Items] |  |
Total long-term regulatory assets | $ 971 | $ 925

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- Definition Regulatory Assets, Cost Percentage Threshold Requiring Approval + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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