Property and Equipment, Net Equipment Leased to Others (Details) (Details) - USD ($) $ in Millions	Oct. 31, 2017	Oct. 31, 2016
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 3,800	$ 3,794
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	2,474	2,553
Property and equipment, net	1,326	1,241
Capital Leased Assets, Gross	61	61
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation	41	38
Capital Leases, Balance Sheet, Assets by Major Class, Net	20	23
Equipment leased to others
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	586	525
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	191	193
Property and equipment, net	$ 395	$ 332