Retirement and Post-Retirement Benefit Plans - Schedule of Funded Status of Defined Benefit and Post-Retirement Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020
Defined Benefit Plans
Change in fair value of plan assets:
Settlement	$ (2,200)
Change in benefits obligation
Actuarial (gain) loss	214
Post-Retirement Benefit Plans
Change in fair value of plan assets:
Fair value of assets — beginning of year		$ 457	$ 481
Actual return on plan assets		(49)	11
Employer contributions		3	2
Participant contributions		39	49
Benefits paid		(67)	(86)
Settlement		0	0
Currency impact		0	0
Fair value of assets — end of year	481	383	457	$ 481
Change in benefits obligation
Projected benefit obligation — beginning of year		354	394
Acquisition of plan		0	0
Service cost		1	1	1
Interest cost		8	9	11
Participant contributions		39	49
Actuarial (gain) loss		(61)	(13)
Benefits paid		(67)	(86)
Plan amendments		0	0
Curtailment		0	0
Settlement		0	0
Currency impact		0	0
Projected benefit obligation — end of year	394	274	354	394
Funded status at end of year		109	103
Accumulated benefit obligation
United States | Defined Benefit Plans
Change in fair value of plan assets:
Fair value of assets — beginning of year		6,060	10,463
Actual return on plan assets		(1,711)	1,403
Employer contributions		29	28
Participant contributions		0	0
Benefits paid		(204)	(427)
Settlement		(4)	(5,407)
Currency impact		0	0
Fair value of assets — end of year	10,463	4,170	6,060	10,463
Change in benefits obligation
Projected benefit obligation — beginning of year		5,740	11,344
Acquisition of plan		0	0
Service cost		0	0	0
Interest cost		161	281	412
Participant contributions		0	0
Actuarial (gain) loss		(1,724)	(51)
Benefits paid		(204)	(427)
Plan amendments		0	0
Curtailment		0	0
Settlement		(4)	(5,407)
Currency impact		0	0
Projected benefit obligation — end of year	11,344	3,969	5,740	11,344
Funded status at end of year		201	320
Accumulated benefit obligation		3,969	5,740
Non-U.S. | Defined Benefit Plans
Change in fair value of plan assets:
Fair value of assets — beginning of year		1,211	1,064
Actual return on plan assets		(131)	117
Employer contributions		34	71
Participant contributions		19	21
Benefits paid		(21)	(45)
Settlement		(62)	(5)
Currency impact		(143)	(12)
Fair value of assets — end of year	1,064	907	1,211	1,064
Change in benefits obligation
Projected benefit obligation — beginning of year		1,726	1,664
Acquisition of plan		11	0
Service cost		56	67	64
Interest cost		22	18	17
Participant contributions		19	21
Actuarial (gain) loss		(420)	(44)
Benefits paid		(21)	(45)
Plan amendments		(5)	62
Curtailment		0	(3)
Settlement		(62)	(5)
Currency impact		(181)	(9)
Projected benefit obligation — end of year	$ 1,664	1,145	1,726	$ 1,664
Funded status at end of year		(238)	(515)
Accumulated benefit obligation		1,035	$ 1,602
Non-U.S. | Defined Benefit Plans | Poly
Change in benefits obligation
Acquisition of plan		$ 11