Financial Instruments - Schedule of Pre-Tax Effect of Derivative Instruments in Cash Flow Hedging Relationships (Details) - Foreign currency contracts - Cash flow hedges - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain (Loss) Recognized in Other Comprehensive Income (“OCI”) on Derivatives (Effective Portion)	$ (169)	$ 105
Gain (Loss) Reclassified from Accumulated OCI Into Earnings (Effective Portion)	71	34
Net revenue
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain (Loss) Reclassified from Accumulated OCI Into Earnings (Effective Portion)	76	78
Cost of revenue
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain (Loss) Reclassified from Accumulated OCI Into Earnings (Effective Portion)	0	(40)
Interest and other, net
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain (Loss) Reclassified from Accumulated OCI Into Earnings (Effective Portion)	$ (5)	$ (4)