EQUITY (Details) $ / shares in Units, purchaseContract in Thousands, equityUnit in Thousands, $ in Millions					1 Months Ended	3 Months Ended	6 Months Ended
	Aug. 03, 2020 equityUnit shares	Jul. 01, 2020 USD ($) shares	Jun. 25, 2020 USD ($) purchaseContract equityUnit shares	Jun. 07, 2020 USD ($) $ / shares	Jul. 31, 2020 USD ($)	Jun. 30, 2020 USD ($) shares	Jun. 30, 2020 USD ($) shares	Jun. 22, 2020 shares	Mar. 20, 2020 USD ($)	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	3,600,000,000		800,000,000
Preferred stock, shares authorized (in shares)								400,000,000
Proceeds through the issuance of common stock and other equity-linked instruments | $			$ 3,970
Sale of stock, consideration received on transaction | $				$ 3,250
Sale of stock, price per share (in dollar per share) | $ / shares				$ 9.50
Proceeds from issuance or sale of equity, net | $			$ 1,190
Proceeds from equity backstop commitments and forward stock purchase agreements | $							$ 523
Equity contribution cash | $						$ 12,900	$ 12,900
Percentage of equity security ownership with board of director approval						4.75%	4.75%
Dividend reinstatement target, amount | $									$ 6,200
Fire Trust Victim
Schedule Of Changes In Equity [Line Items]
Litigation liability, payment accrual | $										$ 6,750
Deferred tax asset, litigation adjustment | $						$ 619
Subsequent event
Schedule Of Changes In Equity [Line Items]
Proceeds through the issuance of common stock and other equity-linked instruments | $		$ 9,000			$ 9,000
Sale of stock, number of shares issued in transaction (in shares)		342,100,000
Proceeds from issuance or sale of equity, net | $		$ 5,200
Transfer of shares to Fire Victim Trust (in 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)	748,415
Subsequent event | Fire Trust Victim
Schedule Of Changes In Equity [Line Items]
Transfer of shares to Fire Victim Trust (in 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)	748,415
Transfer of shares related to litigation settlement, value | $		$ 4,530
Difference between payment accrual and transfer of shares related to litigation settlement, value | $		$ 2,220
Subsequent event | Minimum | PG&E Corporation | Revolving Credit Agreement
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%
Subsequent event | Maximum | PG&E Corporation | Revolving Credit Agreement
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
Sale of stock, number of equity units issued in transaction, additional (in equity units) | equityUnit			1,450
Equity Units Offering | Minimum
Schedule Of Changes In Equity [Line Items]
Right to receive (in shares)			125,000,000
Equity Units Offering | Maximum
Schedule Of Changes In Equity [Line Items]
Right to receive (in shares)			153,000,000
Equity Units Offering | Subsequent event
Schedule Of Changes In Equity [Line Items]
Sale of stock, number of equity units issued 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
February 2017 Equity Distribution Agreement
Schedule Of Changes In Equity [Line Items]
Common stock issued (in shares)						0	0