WILDFIRE-RELATED CONTINGENCIES (Insurance) (Details) - USD ($) $ in Millions		9 Months Ended
	Jul. 01, 2020	Sep. 30, 2020	Jul. 31, 2020
Loss Contingencies [Line Items]
Insurance premium costs, recovery, coverage amount		$ 1,400.0
Cumulative reimbursements from insurance policies		430.0
Insurance Coverage For Wildfire and Non-Wildfire Events
Loss Contingencies [Line Items]
Costs for insurance coverage	$ 859.0
Insurance Coverage For Wildfire and Non-Wildfire Events | August 1, 2019 - September 2, 2020
Loss Contingencies [Line Items]
Costs for insurance coverage		212.0
Insurance Coverage for Wildfire Events
Loss Contingencies [Line Items]
Liability insurance coverage		430.0	$ 867.5
Initial self-insured retention per occurrence		10.0	60.0
Insurance Coverage for Wildfire Events | August 1, 2020 - July 31, 2021
Loss Contingencies [Line Items]
Liability insurance coverage			825.0
Insurance Coverage for Wildfire Events | July 1, 2020 - June 30, 2021
Loss Contingencies [Line Items]
Reinsurance			42.5
Insurance Coverage For Non-Wildfire Events
Loss Contingencies [Line Items]
Liability insurance coverage		1,000.0
Initial self-insured retention per occurrence		10.0
Insurance Coverage For Non-Wildfire Events | August 1, 2019 - July 31, 2020
Loss Contingencies [Line Items]
Liability insurance coverage		520.0
Insurance Coverage For Non-Wildfire Events | September 3, 2019 - September 2, 2020
Loss Contingencies [Line Items]
Liability insurance coverage		480.0
Insurance Coverage For Non-Wildfire Events | August 1, 2020 - July 31, 2021
Loss Contingencies [Line Items]
Liability insurance coverage			700.0
Initial self-insured retention per occurrence			$ 10.0
2018 Camp Fire
Loss Contingencies [Line Items]
Estimated insurance recoveries		1,380.0
Cumulative reimbursements from insurance policies		0.0
2017 Northern California wildfires
Loss Contingencies [Line Items]
Estimated insurance recoveries		843.0
Cumulative reimbursements from insurance policies		$ 0.0