BANKRUPTCY FILING (Chapter 11 Claims Process) (Details) equityUnit in Thousands, $ in Millions	Jul. 01, 2020 USD ($) shares	Aug. 03, 2020 equityUnit shares	Jun. 30, 2020 proofOfClaim	Dec. 31, 2019 USD ($)	Jun. 30, 2018 lawsuit
Debt Instrument [Line Items]
Proofs of claims | proofOfClaim			100,000
Insurance from wildfire events				$ 2,500
Satisfaction of HoldCo Rescission or Damage Claims and Subordinated Debt
Debt Instrument [Line Items]
Number of lawsuits filed against company (lawsuit, complaint) | lawsuit					3
Subsequent event
Debt Instrument [Line Items]
Plan of reorganization, future tax benefits payment agreement	$ 1,350
Plan of reorganization, tax benefits payment agreement	$ 1,350
Transfer of shares to Fire Victim Trust (in shares) | shares	477,000,000
Option to purchase additional contracts (in equity units) | equityUnit		1,450
Transfer of shares to Fire Victim Trust, additional (in shares) | shares		748,415
Subsequent event | Minimum
Debt Instrument [Line Items]
Plan of reorganization, tax benefits payment agreement	$ 650
Subsequent event | Subrogation Wildfire Trust
Debt Instrument [Line Items]
Litigation payment, funded	100
Litigation payment, fund, segregated escrow	11,000
Subsequent event | Settling Public Entities
Debt Instrument [Line Items]
Litigation payment	$ 1,000