Retirement and Post-Retirement Benefit Plans - Pension and Post-Retirement Benefit Expense (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020
Amortization and deferrals:
Settlement (gain) loss		$ 0	$ (37)	$ 214
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]		Interest and other, net	Interest and other, net	Interest and other, net
Defined Benefit Plans
Amortization and deferrals:
Settlement (gain) loss	$ (39)
Post-Retirement Benefit Plans
Net benefit (credit) cost
Service cost		$ 1	$ 1	$ 1
Interest cost		8	9	11
Expected return on plan assets		(9)	(24)	(23)
Amortization and deferrals:
Actuarial loss (gain)		(15)	(16)	(10)
Prior service cost (credit)		(11)	(11)	(12)
Net periodic benefit (credit) cost		(26)	(41)	(33)
Settlement (gain) loss		0	0	0
Special termination benefit cost		0	0	44
Total periodic benefit (credit) cost		(26)	(41)	11
U.S. | Defined Benefit Plans
Net benefit (credit) cost
Service cost		0	0	0
Interest cost		161	281	412
Expected return on plan assets		(298)	(475)	(700)
Amortization and deferrals:
Actuarial loss (gain)		5	50	64
Prior service cost (credit)		0	0	0
Net periodic benefit (credit) cost		(132)	(144)	(224)
Settlement (gain) loss		0	(37)	217
Special termination benefit cost		0	0	0
Total periodic benefit (credit) cost		(132)	(181)	(7)
Non-U.S. | Defined Benefit Plans
Net benefit (credit) cost
Service cost		56	67	64
Interest cost		22	18	17
Expected return on plan assets		(48)	(49)	(43)
Amortization and deferrals:
Actuarial loss (gain)		36	52	43
Prior service cost (credit)		5	5	(2)
Net periodic benefit (credit) cost		71	93	79
Settlement (gain) loss		0	1	1
Special termination benefit cost		0	0	0
Total periodic benefit (credit) cost		$ 71	$ 94	$ 80