BANKRUPTCY FILING (Schedule of Debtor Reorganization Items) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Reorganizations [Line Items]
Debtor-in-possession financing costs	$ 0	$ 0	$ 3	$ 114
Legal and other	145	90	1,949	191
Interest income	(8)	(17)	(15)	(49)
Total reorganization items, net	137	73	1,937	256
Equity backstop premium expense and bridge loan facility fees
Reorganizations [Line Items]
Legal and other			1,500
PG&E Corporation
Reorganizations [Line Items]
Debtor-in-possession financing costs	0	0	0	17
Legal and other	55	7	1,653	10
Interest income	0	(3)	(2)	(8)
Total reorganization items, net	55	4	1,651	19
Utility
Reorganizations [Line Items]
Debtor-in-possession financing costs	0	0	3	97
Legal and other	90	83	296	181
Interest income	(8)	(14)	(13)	(41)
Total reorganization items, net	$ 82	$ 69	$ 286	$ 237