Property and Equipment, Net Depreciation Expense, Amortization Expense, and Interest Capitalized (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Property, Plant and Equipment [Line Items]
Depreciation	$ 133	$ 138	$ 134
Amortization	2	3	5
Interest Costs Capitalized	2	2	3
Equipment leased to others
Property, Plant and Equipment [Line Items]
Depreciation	$ 71	$ 73	$ 79