WILDFIRE-RELATED CONTINGENCIES (Third-Party Claims) (Details) household in Thousands, $ in Millions		1 Months Ended		2 Months Ended
	Apr. 13, 2017 USD ($)	Nov. 30, 2018 USD ($)	May 31, 2017 USD ($)	Sep. 30, 2018 district entity	Jan. 28, 2019 plaintiff complaint household	May 01, 2018 plaintiff	May 23, 2016 contractor
Loss Contingencies [Line Items]
Number of plaintiffs in which agreements were made | plaintiff						2
Butte Fire | Pacific Gas & Electric Co
Loss Contingencies [Line Items]
Number of vegetation management contractors (contractor) | contractor							2
Number of complaints filed (complaint) | complaint					95
Number of plaintiffs (plaintiff) | plaintiff					3,900
Number of households represented in court (household) | household					2
Number of plaintiffs, smaller public entities (plaintiff) | entity				4
Number of plaintiffs, fire districts (plaintiff) | district				3
Fire fighting costs recovery requested	$ 87.0
Value of claims brought against the company			$ 190.0
Office Of Emergency Services Claim, Proof Of Claim			$ 107.0
Butte Fire | Pacific Gas & Electric Co | County of Calaveras
Loss Contingencies [Line Items]
Settlement reached		$ 25.0