INCOME TAXES (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Pacific Gas & Electric Co (Utility)
Deferred income tax assets:
Tax carryforwards	$ 5,425	$ 7,529
Compensation	108	109
Wildfire-related claims	1,723	544
Operating lease liability	346	488
Transmission tower wireless licenses	266	0
Other	293	219
Total deferred income tax assets	8,161	8,889
Deferred income tax liabilities:
Property related basis differences	8,835	8,300
Regulatory balancing accounts	1,193	763
Debt financing costs	501	526
Operating lease right of use asset	346	488
Income tax regulatory asset	517	254
Other	178	128
Total deferred income tax liabilities	11,570	10,459
Total net deferred income tax liabilities	3,409	1,570
PG&E Corporation
Deferred income tax assets:
Tax carryforwards	5,628	7,641
Compensation	185	187
Wildfire-related claims	1,723	544
Operating lease liability	346	489
Transmission tower wireless licenses	266	0
Other	278	212
Total deferred income tax assets	8,426	9,073
Deferred income tax liabilities:
Property related basis differences	8,847	8,311
Regulatory balancing accounts	1,193	763
Debt financing costs	501	526
Operating lease right of use asset	346	489
Income tax regulatory asset	517	254
Other	199	128
Total deferred income tax liabilities	11,603	10,471
Total net deferred income tax liabilities	$ 3,177	$ 1,398