EQUITY (Details) $ / shares in Units, purchaseContract in Thousands, equityUnit in Thousands, $ in Thousands						1 Months Ended	3 Months Ended	9 Months Ended
	Aug. 03, 2020 USD ($) equityUnit shares	Jul. 01, 2020 USD ($) shares	Jun. 25, 2020 USD ($) equityUnit purchaseContract shares	Jun. 07, 2020 USD ($) $ / shares	May 28, 2020	Jul. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Sep. 30, 2020 USD ($) shares	Sep. 30, 2019 USD ($)	Jun. 22, 2020 shares	Mar. 20, 2020 USD ($)	Dec. 31, 2019 USD ($) shares
Schedule Of Changes In Equity [Line Items]
Common stock, shares authorized (in shares)								3,600,000,000		3,600,000,000		800,000,000
Preferred stock, shares authorized (in shares)										400,000,000
Equity Units issued | $		$ 9,000,000	$ 3,970,000			$ 9,000,000		$ 1,304,000	$ 0
Sale of stock, consideration received on transaction | $				$ 3,250,000
Sale of stock, price per share (in dollar per share) | $ / shares				$ 9.50
Sale of stock, number of shares issued in transaction (in shares)		342,100,000
Proceeds from issuance or sale of equity, net | $		$ 5,200,000	$ 1,190,000
Proceeds from equity backstop commitments and forward stock purchase agreements | $								523,000
Sale of stock, redemption of rights, return amount | $	$ 120,500
Sale of stock, issuance and delivery, common stock (in shares)	42,300,000
Transfer of shares to Fire Victim Trust (in shares)		477,000,000
Transfer of shares to Fire Victim Trust, additional (in shares)	748,415
Equity contribution cash | $								$ 12,900,000
Percentage of equity security ownership with board of director approval								4.75%
Dividend reinstatement target, amount | $											$ 6,200,000
Equity capital structure percentage		52.00%
Equity capital structure, waiver period					5 years
Fire Trust Victim
Schedule Of Changes In Equity [Line Items]
Option to purchase additional contracts (in equity units) | equityUnit	1,450
Transfer of shares to Fire Victim Trust (in shares)		477,000,000
Transfer of shares to Fire Victim Trust, additional (in shares)	748,415
Litigation liability, payment accrual | $												$ 6,750,000
Transfer of shares related to litigation settlement, value | $							$ 4,530,000
Difference between payment accrual and transfer of shares related to litigation settlement, value | $							2,220,000
Deferred tax asset, litigation adjustment | $							$ 619,000
Minimum
Schedule Of Changes In Equity [Line Items]
Sale of stock, number of equity units, right to receive	125,000,000
Sale of stock, number of additional units, right to receive	12,500,000
Minimum | PG&E Corporation | Revolving Credit Facility
Schedule Of Changes In Equity [Line Items]
Debt, ratio of total consolidated debt to consolidated capitalization, loans outstanding balance		150.00%
Debt, ratio of total consolidated debt to consolidated capitalization, cash dividend declared		100.00%
Maximum
Schedule Of Changes In Equity [Line Items]
Sale of stock, number of equity units, right to receive	153,000,000
Sale of stock, number of additional units, right to receive	15,300,000
Maximum | PG&E Corporation | Revolving Credit Facility
Schedule Of Changes In Equity [Line Items]
Debt, ratio of total consolidated debt to consolidated capitalization		70.00%
Common Stock Offering
Schedule Of Changes In Equity [Line Items]
Sale of stock, number of shares issued in transaction (in shares)			423,400,000
Option to purchase additional stock (in shares)			42,300,000
Common Stock Underwriters
Schedule Of Changes In Equity [Line Items]
Sale of stock, number of shares issued and sold in transaction (in shares)			423,400,000
Equity Units Offering
Schedule Of Changes In Equity [Line Items]
Sale of stock, number of equity units issued in transaction (in equity units) | equityUnit			14,500
Sale of stock, number of prepaid forward stock purchase contracts issued and sold in transaction (in purchase contracts) | purchaseContract			14,500
Sale of stock, number of prepaid forward stock purchase contracts issued and sold in transaction, additional contracts (in purchase contracts) | purchaseContract			1,450
Option to purchase additional contracts (in equity units) | equityUnit	1,450
Sale of stock, number of equity units issued and sold in transaction, additional (in equity units) | equityUnit	1,450
Equity Units Underwriters
Schedule Of Changes In Equity [Line Items]
Sale of stock, number of prepaid forward stock purchase contracts issued and sold in transaction (in purchase contracts) | purchaseContract			14,500