NORTHERN CALIFORNIA WILDFIRES IMPACT (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Unusual or Infrequent Item, or Both [Line Items]
Document Period End Date			Jul. 31, 2018
Insurance Settlements Receivable, Current	$ 26		$ 26
Unusual or Infrequent Item, or Both, Insurance Proceeds			60
Loss from Catastrophes	0	$ 0	7	$ 0
Insurance Recoveries	$ 21		84
Property, Plant and Equipment [Member]
Unusual or Infrequent Item, or Both [Line Items]
Loss from Catastrophes			18
Uninsured Risk [Member]
Unusual or Infrequent Item, or Both [Line Items]
Loss from Catastrophes			$ 10