Retirement and Post-Retirement Benefit Plans - Summary of Net Benefit Cost (Details) - Benefit Plans - Non-U.S. Defined Benefit Plans - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 21	$ 26
Interest cost	55	55
Expected return on plan assets	(130)	(139)
Amortization and deferrals:
Actuarial loss	57	52
Prior service benefit	(4)	(4)
Net periodic benefit (credit) cost	(1)	(10)
Settlement loss	5	0
Special termination benefits	0	2
Net benefit cost (credit) cost	$ 4	$ (8)