Retirement and Post-Retirement Benefit Plan - Schedule of Defined Benefit Plans with Accumulated Benefit Obligations Exceeding Fair Value of Plan Assets (Details) - Defined Benefit Plans - USD ($) $ in Millions	Oct. 31, 2017	Oct. 31, 2016
United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Aggregate fair value of plan assets	$ 10,838	$ 10,176
Aggregate accumulated benefit obligation	12,266	12,144
Non-U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Aggregate fair value of plan assets	554	619
Aggregate accumulated benefit obligation	$ 777	$ 960