Retirement and Post-Retirement Benefit Plans - Summary of Pre-Tax Net Actuarial Loss (Gain) and Prior Service Benefit Recognized in Accumulated Other Comprehensive Loss for Defined Benefit and Post-Retirement Benefit Plans (Details) $ in Millions	Oct. 31, 2024 USD ($)
Post-Retirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net actuarial loss (gain)	$ (192)
Prior service cost (credit)	(46)
Total recognized in Accumulated other comprehensive income (loss)	(238)
U.S. | Defined Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net actuarial loss (gain)	571
Prior service cost (credit)	0
Total recognized in Accumulated other comprehensive income (loss)	571
Non-U.S. | Defined Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net actuarial loss (gain)	73
Prior service cost (credit)	36
Total recognized in Accumulated other comprehensive income (loss)	$ 109