DEBT (Schedule of Long-term Debt) (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Debt [Line Items]
Total PG&E Corporation Consolidated Debt Subject to Compromise	$ 22,176	$ 22,176
Pacific Gas & Electric Co
Debt [Line Items]
Debt	17,525	17,525
Pollution control bonds	863	863
Total Borrowings under Pre-Petition Credit Facility Subject to Compromise	3,138	3,138
Total PG&E Corporation Consolidated Debt Subject to Compromise	21,526	21,526
Accrued contractual interest subject to compromise	(286)	(286)
Post-petition interest expense	(815)	(638)
PG&E Corporation
Debt [Line Items]
Debt	650	650
Accrued contractual interest subject to compromise	(1)	(1)
Post-petition interest expense	(20)	(15)
Pre-Petition Revolver \| PG&E Corporation
Debt [Line Items]
Debt	$ 300	300
Pre-Petition Revolver \| PG&E Corporation \| London Interbank Offered Rate (LIBOR)
Debt [Line Items]
Stated interest rate	2.46%
Pre-Petition Term Loan \| PG&E Corporation
Debt [Line Items]
Debt	$ 350	350
Pre-Petition Term Loan \| PG&E Corporation \| London Interbank Offered Rate (LIBOR)
Debt [Line Items]
Stated interest rate	2.18%
Senior Notes Due 2020 \| Pacific Gas & Electric Co
Debt [Line Items]
Stated interest rate	3.50%
Debt	$ 800	800
Senior Notes Due 2021 \| Pacific Gas & Electric Co
Debt [Line Items]
Debt	$ 550	550
Senior Notes Due 2021 \| Pacific Gas & Electric Co \| Minimum
Debt [Line Items]
Stated interest rate	3.25%
Senior Notes Due 2021 \| Pacific Gas & Electric Co \| Maximum
Debt [Line Items]
Stated interest rate	4.25%
Senior Notes Due 2022 \| Pacific Gas & Electric Co
Debt [Line Items]
Stated interest rate	2.45%
Debt	$ 400	400
Seniors Note Due 2023 \| Pacific Gas & Electric Co
Debt [Line Items]
Debt	$ 1,175	1,175
Seniors Note Due 2023 \| Pacific Gas & Electric Co \| Minimum
Debt [Line Items]
Stated interest rate	3.25%
Seniors Note Due 2023 \| Pacific Gas & Electric Co \| Maximum
Debt [Line Items]
Stated interest rate	4.25%
Senior Notes Due 2024 Through 2028 \| Pacific Gas & Electric Co
Debt [Line Items]
Debt	$ 3,850	3,850
Senior Notes Due 2024 Through 2028 \| Pacific Gas & Electric Co \| Minimum
Debt [Line Items]
Stated interest rate	2.95%
Senior Notes Due 2024 Through 2028 \| Pacific Gas & Electric Co \| Maximum
Debt [Line Items]
Stated interest rate	4.65%
Senior Notes Due 2034 Through 2040 \| Pacific Gas & Electric Co
Debt [Line Items]
Debt	$ 5,700	5,700
Senior Notes Due 2034 Through 2040 \| Pacific Gas & Electric Co \| Minimum
Debt [Line Items]
Stated interest rate	5.40%
Senior Notes Due 2034 Through 2040 \| Pacific Gas & Electric Co \| Maximum
Debt [Line Items]
Stated interest rate	6.35%
Senior Notes Due 2041 Through 2042 \| Pacific Gas & Electric Co
Debt [Line Items]
Debt	$ 1,000	1,000
Senior Notes Due 2041 Through 2042 \| Pacific Gas & Electric Co \| Minimum
Debt [Line Items]
Stated interest rate	3.75%
Senior Notes Due 2041 Through 2042 \| Pacific Gas & Electric Co \| Maximum
Debt [Line Items]
Stated interest rate	4.50%
Senior Notes Due 2043 \| Pacific Gas & Electric Co
Debt [Line Items]
Stated interest rate	4.60%
Debt	$ 375	375
Senior Notes Due 2043 \| Pacific Gas & Electric Co
Debt [Line Items]
Stated interest rate	5.13%
Debt	$ 500	500
Senior Notes Due 2024 Through 2047 \| Pacific Gas & Electric Co
Debt [Line Items]
Debt	$ 3,175	3,175
Senior Notes Due 2024 Through 2047 \| Pacific Gas & Electric Co \| Minimum
Debt [Line Items]
Stated interest rate	3.95%
Senior Notes Due 2024 Through 2047 \| Pacific Gas & Electric Co \| Maximum
Debt [Line Items]
Stated interest rate	4.75%
Pollution Control Bonds - Series 2008 F and 2010 E, due 2026 \| Pacific Gas & Electric Co
Debt [Line Items]
Stated interest rate	1.75%
Pollution control bonds	$ 100	100
Pollution Control Bonds - Series 2009 A-B, due 2026 \| Pacific Gas & Electric Co
Debt [Line Items]
Stated interest rate	6.45%
Pollution control bonds	$ 149	149
Pollution Control Bonds - Series 1996 C, E, F, 1997 B due 2026 \| Pacific Gas & Electric Co
Debt [Line Items]
Pollution control bonds	$ 614	614
Pollution Control Bonds - Series 1996 C, E, F, 1997 B due 2026 \| Pacific Gas & Electric Co \| Minimum
Debt [Line Items]
Stated interest rate	6.45%
Pollution Control Bonds - Series 1996 C, E, F, 1997 B due 2026 \| Pacific Gas & Electric Co \| Maximum
Debt [Line Items]
Stated interest rate	6.58%
Pre-Petition Credit Facility \| Pacific Gas & Electric Co
Debt [Line Items]
Borrowings under Pre-Petition Credit Facilities	$ 2,888	2,888
Undrawn letters of credit excluded	$ 19
Pre-Petition Credit Facility \| Pacific Gas & Electric Co \| London Interbank Offered Rate (LIBOR)
Debt [Line Items]
Stated interest rate	2.26%
Senior Notes Due 2019 \| Pacific Gas & Electric Co
Debt [Line Items]
Debt	$ 250	$ 250
Senior Notes Due 2019 \| Pacific Gas & Electric Co \| London Interbank Offered Rate (LIBOR)
Debt [Line Items]
Stated interest rate	1.58%

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