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DEBT (Narrative) (Details) - USD ($)						9 Months Ended
	Oct. 04, 2022	Apr. 20, 2022	Apr. 04, 2022	Mar. 31, 2022	Feb. 18, 2022	Sep. 30, 2022	Sep. 30, 2021	Aug. 12, 2022	Jun. 08, 2022	Dec. 31, 2021	Aug. 11, 2021
Debt [Line Items]
Repayments of long-term debt						$ 5,980,000,000	$ 21,000,000
Proceeds from the sale of long-term debt					$ 1,000,000,000
Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Repayments of long-term debt						5,959,000,000	$ 0
2020 Utility Term Loan Credit Agreement | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Repayments of long-term debt				$ 298,000,000
364-Day 2022A Tranche Loans | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross			$ 500,000,000
Credit spread adjustment			0.10%
364-Day 2022A Tranche Loans | Pacific Gas & Electric Co (Utility) | SOFR
Debt [Line Items]
Basis spread on variable rate			1.25%
364-Day 2022A Tranche Loans | Pacific Gas & Electric Co (Utility) | Base Rate
Debt [Line Items]
Basis spread on variable rate			0.25%
364-Day 2022B Tranche Loans | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross		$ 125,000,000
Credit spread adjustment		0.10%
364-Day 2022B Tranche Loans | Pacific Gas & Electric Co (Utility) | SOFR
Debt [Line Items]
Basis spread on variable rate		1.25%
364-Day 2022B Tranche Loans | Pacific Gas & Electric Co (Utility) | Base Rate
Debt [Line Items]
Basis spread on variable rate		0.25%
2-Year 2022B Tranche Loans | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross		$ 400,000,000
Credit spread adjustment		0.10%
2-Year 2022B Tranche Loans | Pacific Gas & Electric Co (Utility) | SOFR
Debt [Line Items]
Basis spread on variable rate		1.25%
2-Year 2022B Tranche Loans | Pacific Gas & Electric Co (Utility) | Base Rate
Debt [Line Items]
Basis spread on variable rate		0.25%
Receivables Securitization Program | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross						1,325,000,000				$ 974,000,000
Increase in facility limit		$ 500,000,000
Line of credit facility, maximum borrowing capacity		$ 1,500,000,000				1,325,000,000		$ 1,500,000,000
First Mortgage Bonds, Stated Maturity 2024 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Debt instrument, face amount					$ 1,000,000,000
Interest rate					3.25%
First Mortgage Bonds, Stated Maturity 2029 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Debt instrument, face amount					$ 400,000,000
Interest rate					4.20%
First Mortgage Bonds, Stated Maturity 2032 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Debt instrument, face amount					$ 450,000,000
Interest rate					4.40%
First Mortgage Bonds, Stated Maturity 2052 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Debt instrument, face amount					$ 550,000,000
Interest rate					5.25%
4.950% Bonds | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Debt instrument, face amount									$ 450,000,000
Interest rate									4.95%
5.450% Bonds | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Debt instrument, face amount									$ 450,000,000
Interest rate									5.45%
5.90% Bonds | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Debt instrument, face amount									$ 600,000,000
Interest rate									5.90%
Intercompany Loan
Debt [Line Items]
Debt instrument, face amount											$ 145,000,000
Revolving Credit Facility
Debt [Line Items]
Long-term debt, gross						2,695,000,000
Line of credit facility, maximum borrowing capacity						5,825,000,000
Revolving Credit Facility | Subsequent Event
Debt [Line Items]
Extension option, term	1 year
Revolving Credit Facility | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross						1,370,000,000
Line of credit facility, maximum borrowing capacity						$ 4,000,000,000
Revolving Credit Facility | Pacific Gas & Electric Co (Utility) | Subsequent Event
Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 4,400,000,000
Extension option, term	1 year

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