WILDFIRE-RELATED CONTINGENCIES (2019 Kincade Fire, 2020 Zogg Fire and 2021 Dixie Fire) (Details) $ in Thousands, numberOfPeople in Millions					3 Months Ended	12 Months Ended
	Mar. 18, 2022 USD ($)	Jan. 05, 2022 USD ($)	Oct. 29, 2021 USD ($) a	Nov. 04, 2019 numberOfPeople	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Apr. 28, 2022 USD ($)	Apr. 21, 2022 numberOfPlaintiff complaint numberOfClaimHolder plaintiff	Apr. 11, 2022 USD ($) notice	Apr. 08, 2022 USD ($) position	Jan. 28, 2022 notice	Jan. 27, 2022 notice	Dec. 02, 2021 transmissionLine	Nov. 18, 2021 notice	Sep. 24, 2021 misdemeanor felony	Aug. 31, 2021 USD ($)	Jul. 13, 2021 a structure numberOfFatality	May 11, 2021 count	Apr. 06, 2021 felony misdemeanor	Sep. 27, 2020 a injury fatality structure	Oct. 23, 2019 a injury structure numberOfFatality
2019 Kincade fire
Loss Contingencies [Line Items]
Number of acres burned (acre) | a																					77,758
Number of fatalities (fatality) | numberOfFatality																					0
Number of injuries | injury																					4
Number of structures destroyed (structure) | structure																					374
Number of structures damaged (structure) | structure																					60
Number of people part of mandatory evacuation order | numberOfPeople				0.2
Number of felonies (felony) | notice											5	2
Number of misdemeanors dropped (misdemeanor) | notice											6
Number of transmission lines | transmissionLine													70
Loss contingency liability					$ 765,000	$ 769,000
Fire fighting costs recovery requested		$ 90,000
Potential loss contingency						800,000
Insurance receivable					430,000
2019 Kincade fire | Subsequent Event
Loss Contingencies [Line Items]
Stipulation costs payable										$ 20,250
Number of new positions headquartered (position) | position										80
Number of complaints (complaint) | complaint								103
Number of plaintiffs represented by complaints | plaintiff								2,656
2019 Kincade fire | Pacific Gas & Electric Co (Utility)
Loss Contingencies [Line Items]
Number of demurrer filed (count) | count																		25
Number of criminal complaints (count) | count																		33
Loss contingency liability					40,000
Loss contingency, costs incurred					85,000
2019 Kincade fire | Pacific Gas & Electric Co (Utility) | Sonoma Contry District Attorney
Loss Contingencies [Line Items]
Number of felonies (felony) | felony																			5
Number of misdemeanors (misdemeanor) | misdemeanor																			28
2020 Zogg fire
Loss Contingencies [Line Items]
Number of acres burned (acre) | a																				56,338
Number of fatalities (fatality) | fatality																				4
Number of injuries | injury																				1
Number of structures destroyed (structure) | structure																				204
Number of structures damaged (structure) | structure																				27
Number of demurrer filed (count) | notice														10
Number of criminal complaints (count) | notice														31
Loss contingency liability					177,000	211,000
Fire suppression and other costs	$ 34,500
Potential loss contingency					375,000
Liability insurance coverage					611,000
Insurance receivable					338,000
Initial self-insured retention per occurrence					60,000
Legal fees					23,000
2020 Zogg fire | Subsequent Event
Loss Contingencies [Line Items]
Number of complaints (complaint) | complaint								23
Number of plaintiffs represented by complaints | numberOfPlaintiff								449
Zogg Complaint, 2020
Loss Contingencies [Line Items]
Number of felonies (felony) | felony															11
Number of misdemeanors (misdemeanor) | misdemeanor															20
2021 Dixie fire
Loss Contingencies [Line Items]
Number of acres burned (acre) | a																	963,309
Number of fatalities (fatality) | numberOfFatality																	1
Number of structures destroyed (structure) | structure																	1,329
Number of structures damaged (structure) | structure																	95
Loss contingency, costs incurred			$ 630,000
Potential loss contingency						$ 1,150,000
Insurance receivable					562,000
Number of residential structures destroyed (structure) | structure																	717
Number of commercial structures destroyed (structure) | structure																	143
Number of other structures destroyed (structure) | structure																	443
Probable of recovery					1,164,000
2021 Dixie fire | Subsequent Event
Loss Contingencies [Line Items]
Stipulation costs payable									$ 34,750
Number of new positions headquartered (position) | notice									80
Number of complaints (complaint) | numberOfClaimHolder								32
Number of plaintiffs represented by complaints | numberOfClaimHolder								1,122
2021 Dixie fire | FERC TO rates
Loss Contingencies [Line Items]
Probable of recovery					102,000
2021 Dixie fire | WEMA
Loss Contingencies [Line Items]
Probable of recovery					350,000
2021 Dixie fire | National Park
Loss Contingencies [Line Items]
Number of acres burned (acre) | a			70,000
2021 Dixie fire | National Forrest
Loss Contingencies [Line Items]
Number of acres burned (acre) | a			685,000
Zogg Fire, 2020 and Dixie Fire, 2021
Loss Contingencies [Line Items]
Liability insurance coverage					900,000
Insurance Coverage for Wildfire Events
Loss Contingencies [Line Items]
Liability insurance coverage																$ 600,000
Initial self-insured retention per occurrence					$ 60,000
Insurance Coverage for Wildfire Events | Subsequent Event
Loss Contingencies [Line Items]
Liability insurance coverage							$ 340,000