Property and Equipment, Net Equipment Leased to Others (Details) (Details) - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 3,868	$ 3,800
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	2,498	2,474
Property and equipment, net	1,370	1,326
Capital Leased Assets, Gross	25	61
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation	21	41
Capital Leases, Balance Sheet, Assets by Major Class, Net	4	20
Equipment leased to others
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	665	586
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	177	191
Property and equipment, net	$ 488	$ 395