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DEBT (Credit Facility) (Details) - USD ($)	Sep. 30, 2021	Jun. 22, 2021	Dec. 31, 2020	Jul. 01, 2020
Debt [Line Items]
Facility Limit	$ 7,000,000,000
Borrowings Outstanding	3,520,000,000
Letters of Credit Outstanding	604,000,000
Facility Availability	2,876,000,000
Revolving Credit Facility | PG&E Corporation
Debt [Line Items]
Facility Limit	500,000,000			$ 500,000,000
Borrowings Outstanding	0
Letters of Credit Outstanding	0
Facility Availability	500,000,000
Revolving Credit Facility | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Facility Limit	4,000,000,000	$ 4,000,000,000		$ 3,500,000,000
Borrowings Outstanding	1,020,000,000
Letters of Credit Outstanding	604,000,000
Facility Availability	2,376,000,000
Letter of credit sublimit	1,500,000,000
Term Loan, January And October 2022 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Facility Limit	1,500,000,000
Borrowings Outstanding	1,500,000,000
Letters of Credit Outstanding	0
Facility Availability	0
Receivables Securitization Program | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Facility Limit	1,000,000,000
Borrowings Outstanding	1,000,000,000		$ 1,000,000,000
Letters of Credit Outstanding	0
Facility Availability	$ 0

X

- Definition

Debt, Letter of Credit Sublimit

+ References

No definition available.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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