DEBT (Schedule of Contractual Repayment Schedule) (Details) $ in Millions	Dec. 31, 2019 USD ($)
Debt [Line Items]
Variable rate obligations	$ 650
Total consolidated debt	$ 22,176
Pacific Gas & Electric Co
Debt [Line Items]
Variable interest rate as of December 31, 2019	8.00%
Variable rate obligations	$ 3,901
Average fixed interest rate	4.52%
Fixed rate obligations	$ 17,625
PG&E Corporation
Debt [Line Items]
Variable interest rate as of December 31, 2019	2.96%
2020
Debt [Line Items]
Total consolidated debt	$ 2,163
2020 | Pacific Gas & Electric Co
Debt [Line Items]
Variable rate obligations	$ 1,013
Average fixed interest rate	3.50%
Fixed rate obligations	$ 800
2020 | Pacific Gas & Electric Co | Pollution Control Bond
Debt [Line Items]
Variable interest rate as of December 31, 2019	8.00%
2020 | Pacific Gas & Electric Co | Term Loan
Debt [Line Items]
Variable interest rate as of December 31, 2019	2.36%
2020 | PG&E Corporation
Debt [Line Items]
Variable interest rate as of December 31, 2019	2.96%
Variable rate obligations	$ 350
2021
Debt [Line Items]
Total consolidated debt	$ 550
2021 | Pacific Gas & Electric Co
Debt [Line Items]
Variable interest rate as of December 31, 2019	0.00%
Variable rate obligations	$ 0
Average fixed interest rate	3.80%
Fixed rate obligations	$ 550
2021 | PG&E Corporation
Debt [Line Items]
Variable interest rate as of December 31, 2019	0.00%
Variable rate obligations	$ 0
2022
Debt [Line Items]
Total consolidated debt	$ 3,688
2022 | Pacific Gas & Electric Co
Debt [Line Items]
Variable interest rate as of December 31, 2019	3.04%
Variable rate obligations	$ 2,888
Average fixed interest rate	2.31%
Fixed rate obligations	$ 500
2022 | PG&E Corporation
Debt [Line Items]
Variable interest rate as of December 31, 2019	3.24%
Variable rate obligations	$ 300
2023
Debt [Line Items]
Total consolidated debt	$ 1,175
2023 | Pacific Gas & Electric Co
Debt [Line Items]
Variable interest rate as of December 31, 2019	0.00%
Variable rate obligations	$ 0
Average fixed interest rate	3.83%
Fixed rate obligations	$ 1,175
2023 | PG&E Corporation
Debt [Line Items]
Variable interest rate as of December 31, 2019	0.00%
Variable rate obligations	$ 0
2024
Debt [Line Items]
Total consolidated debt	$ 800
2024 | Pacific Gas & Electric Co
Debt [Line Items]
Variable interest rate as of December 31, 2019	0.00%
Variable rate obligations	$ 0
Average fixed interest rate	3.60%
Fixed rate obligations	$ 800
2024 | PG&E Corporation
Debt [Line Items]
Variable interest rate as of December 31, 2019	0.00%
Variable rate obligations	$ 0
Thereafter
Debt [Line Items]
Total consolidated debt	$ 13,800
Thereafter | Pacific Gas & Electric Co
Debt [Line Items]
Variable interest rate as of December 31, 2019	0.00%
Variable rate obligations	$ 0
Average fixed interest rate	4.80%
Fixed rate obligations	$ 13,800
Thereafter | PG&E Corporation
Debt [Line Items]
Variable interest rate as of December 31, 2019	0.00%
Variable rate obligations	$ 0