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Debtor Reorganization Items, Subrogation Claims Settlement, Amount

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Percentage of Common Stock Owned, Litigation Settlement, If Company Issues Additional Shares

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Plan of Reorganization, Tax Benefits Payment Agreement

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Sale of Stock, Transfer of Shares Related To Litigation Settlement, Additional

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Noncurrent portion of a debt security issued by a state, certain agencies or authorities, a local government, or development corporation to finance the construction of air- or water-pollution control facilities or sewage or solid waste disposal facilities pursuant to federal law. The bonds are backed by the credit of the beneficiary of the financing rather than the credit of the issuer.

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The amount of cash paid for the settlement of litigation or for other legal issues during the period.

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The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

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BANKRUPTCY FILING (Plan of Reorganization and Restructuring Support Agreements) (Details) - USD ($)				1 Months Ended	12 Months Ended
	Jul. 01, 2020	Jun. 25, 2020	Sep. 22, 2019	Jul. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 15, 2021	Aug. 03, 2020	Jun. 12, 2020
Debt Instrument [Line Items]
Subrogation claims, professional fees			$ 55,000,000
Proceeds from issuance or sale of equity	$ 9,000,000,000.0	$ 3,970,000,000		$ 9,000,000,000.0	$ 1,304,000,000	$ 0	$ 0
Plan of reorganization, tax benefits payment agreement	$ 1,350,000,000
Transfer of shares to Fire Victim Trust (in shares)	477,000,000.0
Transfer of shares to Fire Victim Trust, additional (in shares)									748,415
TCC claims settlement, amount	$ 11,000,000,000.0		$ 11,000,000,000.0
Subsequent Event
Debt Instrument [Line Items]
Payment of plan of reorganization, tax benefits payment agreement								$ 758,000,000
Settling Public Entities
Debt Instrument [Line Items]
Litigation payment	1,000,000,000.0
Litigation, segregated reimbursement fund	10,000,000
Minimum
Debt Instrument [Line Items]
Plan of reorganization, tax benefits payment agreement	650,000,000
Fire Victim Trust
Debt Instrument [Line Items]
Cash contribution by company	$ 5,400,000,000
Percentage of common stock owned, Fire Victim Trust if common issues additional shares	22.19%									22.19%
Litigation payment, fund, cash	$ 5,400,000,000
Transfer of shares to Fire Victim Trust (in shares)	477,000,000
Transfer of shares to Fire Victim Trust, additional (in shares)									748,415
Subrogation Wildfire Trust
Debt Instrument [Line Items]
Subrogation claims, professional fees	$ 52,000,000
Litigation payment, fund, cash	11,000,000,000.0
Litigation payment, funded	100,000,000
New PG&E Corporation Debt
Debt Instrument [Line Items]
Issuance	4,750,000,000
PG&E Corporation
Debt Instrument [Line Items]
Proceeds from issuance or sale of equity					1,304,000,000	0	$ 0
PG&E Corporation \| Pre-Petition Debt
Debt Instrument [Line Items]
Issuance	9,575,000,000
PG&E Corporation \| New Utility Debt
Debt Instrument [Line Items]
Issuance	23,775,000,000
PG&E Corporation \| New Utility Long-Term Bonds
Debt Instrument [Line Items]
Issuance	$ 6,200,000,000
PG&E Corporation \| First Mortgage Bonds Due 2030
Debt Instrument [Line Items]
Stated interest rate	4.55%
PG&E Corporation \| First Mortgage Bonds Due 2050
Debt Instrument [Line Items]
Stated interest rate	4.95%
PG&E Corporation \| New Utility Short-Term Bonds
Debt Instrument [Line Items]
Issuance	$ 1,750,000,000
PG&E Corporation \| First Mortgage Bonds Due 2025
Debt Instrument [Line Items]
Stated interest rate	3.45%
PG&E Corporation \| First Mortgage Bonds Due 2028
Debt Instrument [Line Items]
Stated interest rate	3.75%
PG&E Corporation \| New Utility Funded Debt Exchange Notes
Debt Instrument [Line Items]
Issuance	$ 3,900,000,000
PG&E Corporation \| First Mortgage Bonds, Exchange Stated Maturity 2025
Debt Instrument [Line Items]
Stated interest rate	3.15%
PG&E Corporation \| First Mortgage Bonds, Exchange Stated Maturity 2040
Debt Instrument [Line Items]
Stated interest rate	4.50%
PG&E Corporation \| New Debt Securities or Bank Debt
Debt Instrument [Line Items]
Issuance	$ 11,925,000,000
Expected repayment	6,000,000,000.0
Pacific Gas & Electric Co (Utility)
Debt Instrument [Line Items]
Subrogation claims, professional fees					$ 53,000,000
Plan of reorganization, future tax benefits payment agreement	$ 1,350,000,000
Pacific Gas & Electric Co (Utility) \| Pre-petition Senior Notes, Due October 2020
Debt Instrument [Line Items]
Stated interest rate	3.50%
Pacific Gas & Electric Co (Utility) \| Pre-petition Senior Notes, Due May 2021
Debt Instrument [Line Items]
Stated interest rate	4.25%
Pacific Gas & Electric Co (Utility) \| Pre-petition Senior Notes, Due September 2021
Debt Instrument [Line Items]
Stated interest rate	3.25%
Pacific Gas & Electric Co (Utility) \| Pre-petition Senior Notes, Due August 2020
Debt Instrument [Line Items]
Stated interest rate	2.45%
Pacific Gas & Electric Co (Utility) \| Pre-petition Senior Notes, Due 2034
Debt Instrument [Line Items]
Stated interest rate	6.05%
Pacific Gas & Electric Co (Utility) \| Pre-petition Senior Notes, Due March 2037
Debt Instrument [Line Items]
Stated interest rate	5.80%
Pacific Gas & Electric Co (Utility) \| Pre-petition Senior Notes, Due February 2038
Debt Instrument [Line Items]
Stated interest rate	6.35%
Pacific Gas & Electric Co (Utility) \| Pre-petition Senior Notes, Due March 2039
Debt Instrument [Line Items]
Stated interest rate	6.25%
Pacific Gas & Electric Co (Utility) \| Pre-petition Senior Notes, Due January 2040
Debt Instrument [Line Items]
Stated interest rate	5.40%
Pacific Gas & Electric Co (Utility) \| Pre-petition Senior Notes, Due November 2043
Debt Instrument [Line Items]
Stated interest rate	5.125%
Pacific Gas & Electric Co (Utility) \| Pollution Control Bonds Series 2008, F, And 2010, E, 1.75%, Due 2026
Debt Instrument [Line Items]
Stated interest rate					0.0175%
Pollution control bonds	$ 100,000,000				$ 0	$ 100,000,000
Pacific Gas & Electric Co (Utility) \| First Mortgage Bonds Due 2030
Debt Instrument [Line Items]
Stated interest rate	4.55%
Pacific Gas & Electric Co (Utility) \| First Mortgage Bonds Due 2050
Debt Instrument [Line Items]
Stated interest rate	4.95%
Pacific Gas & Electric Co (Utility) \| First Mortgage Bonds Due 2025
Debt Instrument [Line Items]
Stated interest rate	3.45%
Pacific Gas & Electric Co (Utility) \| First Mortgage Bonds Due 2028
Debt Instrument [Line Items]
Stated interest rate	3.75%
Pacific Gas & Electric Co (Utility) \| First Mortgage Bonds, Exchange Stated Maturity 2025
Debt Instrument [Line Items]
Stated interest rate					3.45%
Pacific Gas & Electric Co (Utility) \| First Mortgage Bonds, Exchange Stated Maturity 2040
Debt Instrument [Line Items]
Stated interest rate					4.50%