BANKRUPTCY FILING (Schedule of Liabilities Subject to Compromise) (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Reorganizations [Line Items]
Financing debt	$ 23,298	$ 23,116
Wildfire-related claims	25,548	25,548
Trade creditors	1,205	1,188
Non-qualified benefit plan	152	157
2001 bankruptcy disputed claims	238	234
Customer deposits & advances	78	71
Other	232	232
Total Liabilities Subject to Compromise	50,751	50,546
Liabilities subject to compromise, interest expense	17	14
Pacific Gas & Electric Co
Reorganizations [Line Items]
Financing debt	22,627	22,450
Wildfire-related claims	25,548	25,548
Trade creditors	1,200	1,183
Non-qualified benefit plan	20	20
2001 bankruptcy disputed claims	238	234
Customer deposits & advances	78	71
Other	230	230
Total Liabilities Subject to Compromise	49,941	49,736
Aggregate principal amount of debt subject to compromise	(21,526)	(21,526)
Accrued contractual interest subject to compromise	(286)	(286)
Post-petition interest expense	(815)	(638)
PG&E Corporation
Reorganizations [Line Items]
Financing debt	671	666
Wildfire-related claims	0	0
Trade creditors	5	5
Non-qualified benefit plan	132	137
2001 bankruptcy disputed claims	0	0
Customer deposits & advances	0	0
Other	2	2
Total Liabilities Subject to Compromise	810	810
Aggregate principal amount of debt subject to compromise	(650)	(650)
Accrued contractual interest subject to compromise	(1)	(1)
Post-petition interest expense	$ (20)	$ (15)