Restructuring and Other Charges - Schedule of Restructuring Activities by Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]	Restructuring and other charges
Restructuring Reserve [Roll Forward]
Accrued balance, beginning of the period	$ 138	$ 108	$ 32
Charges	327	233	444
Cash payments	(248)	(196)	(222)
Non-cash and other adjustments	(45)	(7)	(146)
Accrued balance, end of the period	172	138	108
Total costs incurred to date	1,869
Reflected in Consolidated Balance Sheet:
Other current liabilities	167
Other non-current liabilities	5
Fiscal 2023 Plan | Severance and EER
Restructuring Reserve [Roll Forward]
Accrued balance, beginning of the period	120	88	0
Charges	266	205	402
Cash payments	(230)	(173)	(172)
Non-cash and other adjustments	4	0	(142)
Accrued balance, end of the period	160	120	88
Total costs incurred to date	873
Reflected in Consolidated Balance Sheet:
Other current liabilities	160
Other non-current liabilities	0
Fiscal 2023 Plan | Non-labor
Restructuring Reserve [Roll Forward]
Accrued balance, beginning of the period	11	18	0
Charges	61	16	41
Cash payments	(14)	(18)	(15)
Non-cash and other adjustments	(50)	(5)	(8)
Accrued balance, end of the period	8	11	18
Total costs incurred to date	118
Reflected in Consolidated Balance Sheet:
Other current liabilities	3
Other non-current liabilities	5
Fiscal 2023 Plan | Special Termination Benefits
Restructuring Reserve [Roll Forward]
Charges			105
Non-cash and other adjustments	139
Other prior year plans
Restructuring Reserve [Roll Forward]
Accrued balance, beginning of the period	7	2	32
Charges	0	12	1
Cash payments	(4)	(5)	(35)
Non-cash and other adjustments	1	(2)	4
Accrued balance, end of the period	4	$ 7	$ 2
Total costs incurred to date	878
Reflected in Consolidated Balance Sheet:
Other current liabilities	4
Other non-current liabilities	$ 0