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
	Jan. 31, 2019	Jan. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Earnings on Derivatives	$ (221)	$ (389)
Foreign currency contracts | Interest and other, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Earnings on Derivatives	(231)	(390)
Other derivatives | Interest and other, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Earnings on Derivatives	$ 10	$ 1