Balance Sheet Details - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deferred revenue	$ 3,408	$ 3,430
Contract liabilities	6,400	6,200
Unearned revenue recognized	3,200
Remaining performance obligation	6,400
Current portion of capitalized costs	64	54
Noncurrent portion of capitalized costs	95	76
Amortization of capitalized costs to obtain a contract	73	58
Notes payable and short-term borrowings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deferred revenue	$ 65	$ 75	$ 80