Financial Instruments - Schedule of Pre-Tax Effect of Derivative Instruments not Designated as Hedging Instruments on the Consolidated Condensed Statements of Earnings (Details) - Interest and other, net - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Derivative Instruments, Gain (Loss)
(Loss) /Gain Recognized in Earnings on Derivatives	$ 57	$ (62)	$ 79	$ (128)
Foreign currency contracts
Derivative Instruments, Gain (Loss)
(Loss) /Gain Recognized in Earnings on Derivatives	46	(59)	63	(116)
Other derivatives
Derivative Instruments, Gain (Loss)
(Loss) /Gain Recognized in Earnings on Derivatives	$ 11	$ (3)	$ 16	$ (12)