INCOME TAXES (Schedule of Change in Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pacific Gas & Electric Co (Utility)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, beginning of period	$ 498	$ 437	$ 420
Reductions for tax position taken during a prior year	(1)	(23)	(43)
Additions for tax position taken during the current year	73	85	60
Settlements	0	(1)	0
Balance, end of period	570	498	437
PG&E Corporation
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, beginning of period	498	437	420
Reductions for tax position taken during a prior year	(1)	(23)	(43)
Additions for tax position taken during the current year	73	85	60
Settlements	0	(1)	0
Balance, end of period	$ 570	$ 498	$ 437