Retirement and Post-Retirement Benefit Plans - Summary of Net Actuarial Loss (Gain) and Prior Service Benefit Expected to be Amortized (Details) $ in Millions	Oct. 31, 2020 USD ($)
Post-Retirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net actuarial loss (gain)	$ (17)
Prior service benefit	(11)
Total expected to be recognized in net periodic benefit cost (credit)	(28)
U.S. | Defined Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net actuarial loss (gain)	59
Prior service benefit	0
Total expected to be recognized in net periodic benefit cost (credit)	59
Non-U.S. | Defined Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net actuarial loss (gain)	54
Prior service benefit	(2)
Total expected to be recognized in net periodic benefit cost (credit)	$ 52