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Balance Sheet Details - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Apr. 30, 2025
Jan. 31, 2025
Apr. 30, 2024
Apr. 30, 2025
Apr. 30, 2024
Oct. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Deferred revenue $ 4,172     $ 4,172   $ 3,904
Supplier Finance Program, Obligation, Statement of Financial Position [Extensible Enumeration] Accounts payable     Accounts payable    
Supplier finance program, obligation $ 490     $ 490   466
Other non-current liabilities 7,011     7,011   6,905
Trade receivables sold 900 $ 3,100   1,800    
Unearned revenue recognized       1,800    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]            
Unsatisfied performance obligations 7,800     7,800    
Non-current portion of capitalized costs 132     132   136
Current portion of capitalized costs 86     86   88
Amortization of capitalized costs to obtain a contract 27   $ 26 54 $ 52  
Provision for inventory and credit losses 105     149   89
Notes payable and short-term borrowings            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Deferred revenue $ 59     $ 59   $ 62
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-05-01            
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]            
Unsatisfied performance obligation expected to be recognized over the remainder of the year 35.00%     35.00%    
Expected timing of satisfaction 6 months     6 months    
Employee Severance            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Other accrued liabilities $ 197     $ 197    
Other non-current liabilities $ 42     $ 42