BANKRUPTCY FILING (Schedule of Debtor Reorganization Items) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Reorganizations [Line Items]
Debtor-in-possession financing costs	$ 0	$ 1	$ 0	$ 3
Legal and other	16	1,623	20	1,804
Other	(5)
Interest income		0	(9)	(7)
Total reorganization items, net	11	1,624	11	1,800
Equity backstop premium expense, bridge loan facility fees, and trustee fees	1,500		1,500
PG&E Corporation
Reorganizations [Line Items]
Debtor-in-possession financing costs	0	0	0	0
Legal and other	1	1,513	(1)	1,598
Other	0
Interest income		0	0	(2)
Total reorganization items, net	1	1,513	(1)	1,596
Utility
Reorganizations [Line Items]
Debtor-in-possession financing costs	0	1	0	3
Legal and other	15	110	21	206
Other	(5)
Interest income		0	(9)	(5)
Total reorganization items, net	$ 10	$ 111	$ 12	$ 204