Property and Equipment, Net Depreciation Expense, Amortization Expense, and Interest Capitalized (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Property, Plant and Equipment [Line Items]
Depreciation	$ 138	$ 134	$ 190
Amortization	3	5	5
Interest Costs Capitalized	2	3	1
Equipment leased to others
Property, Plant and Equipment [Line Items]
Depreciation	$ 73	$ 79	$ 76