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WILDFIRE-RELATED CONTINGENCIES (Wildfire-Related Claims Narrative) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Jun. 18, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Aug. 02, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Wildfire-related claims		$ 0		$ 0			$ 14,226
Public Entity Wildfire Claims \| Settled Litigation
Loss Contingencies [Line Items]
Settlement reached	$ 1,000
2018 Camp Fire and 2017 Northern California Wildfires
Loss Contingencies [Line Items]
Wildfire-related claims		100		100		$ 105
2017 Northern California wildfires \| Public Entity Wildfire Claims \| Settled Litigation
Loss Contingencies [Line Items]
Settlement reached				30
2018 Camp Fire \| Public Entity Wildfire Claims \| Settled Litigation
Loss Contingencies [Line Items]
Settlement reached				70
Pacific Gas & Electric Co
Loss Contingencies [Line Items]
Wildfire-related claims		0		0			$ 14,226
Pacific Gas & Electric Co \| 2017 Northern California wildfires
Loss Contingencies [Line Items]
Legal and other costs		13	$ 53	54	$ 120
Pacific Gas & Electric Co \| 2018 Camp Fire
Loss Contingencies [Line Items]
Legal and other costs		$ 25		$ 57