INCOME TAXES (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Pacific Gas & Electric Co (Utility)
Deferred income tax assets:
Tax carryforwards	$ 7,529	$ 1,308
Compensation	109	92
Wildfire-related claims	544	6,520
Operating lease liability	488	640
Other	219	121
Total deferred income tax assets	8,889	8,681
Deferred income tax liabilities:
Property related basis differences	8,300	7,973
Regulatory balancing accounts	763	381
Debt financing costs	526	0
Operating lease right of use asset	488	640
Income tax regulatory asset	254	71
Other	128	58
Total deferred income tax liabilities	10,459	9,123
Total net deferred income tax liabilities	1,570	442
PG&E Corporation
Deferred income tax assets:
Tax carryforwards	7,641	1,390
Compensation	187	151
Wildfire-related claims	544	6,520
Operating lease liability	489	642
Other	212	112
Total deferred income tax assets	9,073	8,815
Deferred income tax liabilities:
Property related basis differences	8,311	7,984
Regulatory balancing accounts	763	381
Debt financing costs	526	0
Operating lease right of use asset	489	642
Income tax regulatory asset	254	71
Other	128	57
Total deferred income tax liabilities	10,471	9,135
Total net deferred income tax liabilities	$ 1,398	$ 320