SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - 10Q Narrative (Details)		3 Months Ended		6 Months Ended
	Apr. 20, 2022 USD ($)	Jun. 30, 2022 USD ($) employee	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) employee	Jun. 30, 2021 USD ($)	Jul. 20, 2022 USD ($)	May 10, 2022 USD ($)	Dec. 31, 2021 USD ($)	Nov. 12, 2021 USD ($)
Public Utility, Property, Plant and Equipment [Line Items]
Period for probable revenue recovery				24 months
Monte carlo simulation, historical data, period				12 years
Litigation liability, current		$ 193,000,000		$ 193,000,000
Wildfire Fund asset		461,000,000		461,000,000				$ 461,000,000
Litigation contribution, net		5,100,000,000		5,100,000,000
Amortization and accretion		117,000,000	$ 118,000,000	235,000,000	$ 237,000,000
Insurance receivable		$ 1,124,000,000		$ 1,124,000,000				1,247,000,000
Number of eligible employees | employee		445		445
Expected credit losses		$ 76,000,000		$ 76,000,000
Regulatory Balancing Accounts Receivable
Public Utility, Property, Plant and Equipment [Line Items]
Total regulatory balancing accounts		3,870,000,000		3,870,000,000				2,999,000,000
Regulatory Balancing Accounts Receivable | Residential uncollectibles balancing accounts
Public Utility, Property, Plant and Equipment [Line Items]
Total regulatory balancing accounts		95,000,000		95,000,000				127,000,000
COVID-19 Pandemic protection memorandum account
Public Utility, Property, Plant and Equipment [Line Items]
Regulatory assets		12,000,000		12,000,000
2021 Dixie fire
Public Utility, Property, Plant and Equipment [Line Items]
Insurance receivable		555,000,000		$ 555,000,000				563,000,000
Wildfire Fund Asset
Public Utility, Property, Plant and Equipment [Line Items]
Finite-lived intangible asset, useful life				15 years
Other Current Liabilities
Public Utility, Property, Plant and Equipment [Line Items]
Wildfire fund, noncurrent		1,100,000,000		$ 1,100,000,000
Other noncurrent assets – other | 2021 Dixie fire
Public Utility, Property, Plant and Equipment [Line Items]
Insurance receivable		150,000,000		150,000,000
Pacific Gas & Electric Co (Utility)
Public Utility, Property, Plant and Equipment [Line Items]
Wildfire Fund asset		461,000,000		461,000,000				461,000,000
Amortization and accretion		117,000,000	$ 118,000,000	235,000,000	$ 237,000,000
Receivables Securitization Program | Pacific Gas & Electric Co (Utility)
Public Utility, Property, Plant and Equipment [Line Items]
Aggregate maximum amount of loans made by lenders	$ 1,500,000,000	1,000,000,000		1,000,000,000
Increase in facility amount	$ 500,000,000
Outstanding borrowings		1,000,000,000		1,000,000,000				974,000,000
Receivables Securitization Program | PG&E AR Facility, LLC (SPV)
Public Utility, Property, Plant and Equipment [Line Items]
Accounts receivable, net		2,800,000,000		2,800,000,000				3,300,000,000
Recovery Bonds | Secured Debt
Public Utility, Property, Plant and Equipment [Line Items]
Debt instrument, face amount		860,000,000		860,000,000				$ 860,000,000	$ 860,000,000
Recovery Bonds | Secured Debt | Tranche One
Public Utility, Property, Plant and Equipment [Line Items]
Debt instrument, face amount									$ 266,000,000
Interest rate									1.46%
Recovery Bonds | Secured Debt | Tranche Two
Public Utility, Property, Plant and Equipment [Line Items]
Debt instrument, face amount									$ 160,000,000
Interest rate									2.28%
Recovery Bonds | Secured Debt | Tranche Three
Public Utility, Property, Plant and Equipment [Line Items]
Debt instrument, face amount									$ 434,000,000
Interest rate									2.82%
SB 901 Securitization | Secured Debt
Public Utility, Property, Plant and Equipment [Line Items]
Debt instrument, face amount		$ 3,600,000,000		$ 3,600,000,000			$ 3,600,000,000
SB 901 Securitization | Secured Debt | Subsequent Event
Public Utility, Property, Plant and Equipment [Line Items]
Debt instrument, face amount						$ 3,900,000,000