Financial Instruments - Pre-tax Effect of Derivative Instruments Not Designated as Hedging Instruments on the Condensed Consolidated and Combined Statements of Earnings (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Earnings on Derivatives	$ (279)	$ (83)	$ (521)	$ (407)
Foreign currency contracts | Interest and other, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Earnings on Derivatives	(279)	(85)	(525)	(409)
Other derivatives | Interest and other, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Earnings on Derivatives	$ 0	$ 2	$ 4	$ 2