Property and Equipment, Net Equipment Leased to Others (Details) (Details) - USD ($) $ in Millions	Oct. 31, 2016	Oct. 31, 2015
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 3,794	$ 3,891
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	2,553	2,546
Property and equipment, net	1,241	1,345
Capital Leased Assets, Gross	61	70
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation	38	34
Capital Leases, Balance Sheet, Assets by Major Class, Net	23	36
Equipment leased to others
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	525	613
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	193	220
Property and equipment, net	$ 332	$ 393