SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (10K Narrative) (Details) ft² in Thousands			1 Months Ended		3 Months Ended		12 Months Ended
	Nov. 17, 2022 USD ($)	Oct. 18, 2022 USD ($)	Nov. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2022 USD ($) ft² employee	Dec. 31, 2021 USD ($)	Dec. 31, 2022 USD ($) ft² facility employee	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jan. 31, 2023 ft²	Sep. 02, 2022 USD ($)	Jul. 20, 2022 USD ($)	May 10, 2022 USD ($)	Nov. 12, 2021 USD ($)	Oct. 23, 2020 USD ($) ft²
Public Utility, Property, Plant and Equipment [Line Items]
Restricted cash				$ 16,000,000	$ 213,000,000	$ 16,000,000	$ 213,000,000	$ 16,000,000
Period for probable revenue recovery							24 months
Allowance for credit loss decrease					88,000,000	207,000,000
Credit losses							$ 143,000,000	154,000,000
Decommissioning cost estimate				4,000,000,000
Asset retirement obligation				5,298,000,000	5,912,000,000	5,298,000,000	5,912,000,000	5,298,000,000	$ 6,412,000,000
Decrease in decommissioning cost				1,300,000,000
Decrease in decommissioning cost, un-escalated				378,000,000
Decrease in decommissioning cost, escalated				2,600,000,000
Increase (decrease) in asset retirement obligation							$ 614,000,000
Government Assistance, Statement of Income or Comprehensive Income [Extensible Enumeration]							Operating and maintenance
Litigation liability, current					193,000,000		$ 193,000,000
Wildfire Fund asset				461,000,000	460,000,000	461,000,000	460,000,000	461,000,000
Litigation contribution, net					4,800,000,000		4,800,000,000
Amortization and accretion							477,000,000	517,000,000	$ 413,000,000
Insurance receivable				1,247,000,000	$ 794,000,000	1,247,000,000	$ 794,000,000	1,247,000,000
Number of eligible employees | employee					470		470
Lease payments							$ 2,300,000,000	2,400,000,000
Operating lease right of use asset				$ 1,234,000,000	$ 1,311,000,000	$ 1,234,000,000	1,311,000,000	$ 1,234,000,000
Operating lease, right-of-use liability					$ 1,474,000,000		$ 1,474,000,000
Weighted average remaining lease term				6 years 14 days	19 years 7 months 6 days	6 years 14 days	19 years 7 months 6 days	6 years 14 days
Weighted average discount rate				6.10%	6.50%	6.10%	6.50%	6.10%
CAPP Funding
Public Utility, Property, Plant and Equipment [Line Items]
Disbursement			$ 200,000,000
Performance-Based Disbursement
Public Utility, Property, Plant and Equipment [Line Items]
Disbursement		$ 7
Maximum disbursement		300,000,000
Performance-Based Disbursement | Utilities Operating Expense, Maintenance and Operations
Public Utility, Property, Plant and Equipment [Line Items]
Reimbursement amount							$ 38,000,000
Civil Nuclear Credit Program
Public Utility, Property, Plant and Equipment [Line Items]
Disbursement	$ 1,100,000,000
Long-Term Debt | Performance-Based Disbursement
Public Utility, Property, Plant and Equipment [Line Items]
Reimbursement amount							312,000,000
Other Current Liabilities
Public Utility, Property, Plant and Equipment [Line Items]
Wildfire fund, noncurrent					$ 935,000,000		935,000,000
One-time Termination Benefits
Public Utility, Property, Plant and Equipment [Line Items]
Severance costs							80,000,000
Credits to employee retirement health savings accounts							22,000,000
2021 Dixie fire
Public Utility, Property, Plant and Equipment [Line Items]
Insurance receivable				$ 563,000,000	530,000,000	$ 563,000,000	530,000,000	$ 563,000,000
2021 Dixie fire | Other noncurrent assets – other
Public Utility, Property, Plant and Equipment [Line Items]
Insurance receivable					175,000,000		175,000,000
Regulatory Balancing Accounts Receivable
Public Utility, Property, Plant and Equipment [Line Items]
Total regulatory balancing accounts				2,999,000,000	3,264,000,000	2,999,000,000	3,264,000,000	2,999,000,000
COVID-19 Pandemic protection memorandum account
Public Utility, Property, Plant and Equipment [Line Items]
Regulatory assets				30,000,000	3,000,000	30,000,000	3,000,000	30,000,000
FERC TO rates
Public Utility, Property, Plant and Equipment [Line Items]
Regulatory assets				12,000,000	8,000,000	12,000,000	8,000,000	12,000,000
Residential uncollectibles balancing accounts | Regulatory Balancing Accounts Receivable
Public Utility, Property, Plant and Equipment [Line Items]
Total regulatory balancing accounts				127,000,000	126,000,000	127,000,000	$ 126,000,000	127,000,000
Wildfire Fund Asset
Public Utility, Property, Plant and Equipment [Line Items]
Finite-lived intangible asset, useful life							15 years
Recovery Bonds | Secured Debt
Public Utility, Property, Plant and Equipment [Line Items]
Debt instrument, face amount				860,000,000	1,800,000,000	860,000,000	$ 1,800,000,000	860,000,000						$ 860,000,000
Long-term debt, gross				860,000,000	9,292,000,000	860,000,000	9,292,000,000	860,000,000
Series 2022-A Recovery Bonds
Public Utility, Property, Plant and Equipment [Line Items]
Debt instrument, face amount			$ 983,000,000
SB 901 Securitization | Secured Debt
Public Utility, Property, Plant and Equipment [Line Items]
Debt instrument, face amount					7,500,000,000		7,500,000,000					$ 3,900,000,000	$ 3,600,000,000
Pacific Gas & Electric Co (Utility)
Public Utility, Property, Plant and Equipment [Line Items]
Restricted cash				16,000,000	213,000,000	16,000,000	$ 213,000,000	$ 16,000,000
Composite depreciation rate							3.74%	3.82%	3.76%
AFUDC debt recorded							$ 81,000,000	$ 56,000,000	$ 35,000,000
AFUDC equity recorded							184,000,000	133,000,000	140,000,000
Nuclear decommissioning obligation accrued							4,100,000,000	3,900,000,000
Decommissioning cost estimate							7,100,000,000	7,600,000,000
Wildfire Fund asset				461,000,000	460,000,000	461,000,000	460,000,000	461,000,000
Amortization and accretion					477,000,000	517,000,000	477,000,000	517,000,000	$ 413,000,000
Operating lease right of use asset				1,232,000,000	$ 1,311,000,000	1,232,000,000	$ 1,311,000,000	1,232,000,000
Pacific Gas & Electric Co (Utility) | Oakland Headquarters Lease
Public Utility, Property, Plant and Equipment [Line Items]
Rentable square feet | ft²					488		488								910
Lease, option payment letter of credit															$ 75,000,000
Lease, security letter of credit															75,000,000
Purchase options, land, value															$ 892,000,000
Operating lease right of use asset					$ 535,000,000		$ 535,000,000
Leasehold improvements					214,000,000		214,000,000
Leasehold incentives					137,000,000		137,000,000
Operating lease, right-of-use liability					672,000,000		672,000,000
Pacific Gas & Electric Co (Utility) | Oakland Headquarters Lease | Subsequent Event
Public Utility, Property, Plant and Equipment [Line Items]
Rentable square feet | ft²										110
Pacific Gas & Electric Co (Utility) | Receivables Securitization Program
Public Utility, Property, Plant and Equipment [Line Items]
Long-term debt, gross				974,000,000	1,184,000,000	974,000,000	$ 1,184,000,000	974,000,000
Pacific Gas & Electric Co (Utility) | Senate Bill 846
Public Utility, Property, Plant and Equipment [Line Items]
Debt instrument, face amount		$ 1,100,000,000
Pacific Gas & Electric Co (Utility) | Senate Bill 846 | Maximum
Public Utility, Property, Plant and Equipment [Line Items]
Debt instrument, face amount											$ 1,400,000,000
Pacific Gas & Electric Co (Utility) | Diablo Canyon
Public Utility, Property, Plant and Equipment [Line Items]
Number of generation facilities | facility							2
Pacific Gas & Electric Co (Utility) | Humboldt Bay
Public Utility, Property, Plant and Equipment [Line Items]
Number of generation facilities | facility							1
PG&E AR Facility, LLC (SPV) | Receivables Securitization Program
Public Utility, Property, Plant and Equipment [Line Items]
Accounts receivable, net				$ 3,300,000,000	$ 3,600,000,000	$ 3,300,000,000	$ 3,600,000,000	$ 3,300,000,000