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Overview and Summary of Significant Accounting Policies - Narrative (Details)
$ in Millions
 1 Months Ended 12 Months Ended
Oct. 12, 2021
USD ($)
Aug. 31, 2021
USD ($)
Oct. 31, 2021
USD ($)
Aug. 31, 2021
USD ($)
Oct. 31, 2021
USD ($)
receivableBalance
Oct. 31, 2020
USD ($)
Oct. 31, 2019
USD ($)
Oct. 31, 2018
USD ($)
Segment Reporting Information                
Advertising expense         $ 172 $ 143 $ 188  
Average warranty expense as a percent of annual product revenue         1.30%      
Allowance for credit loss     $ 228   $ 228 154 131 $ 120
Stockholders' equity     20,017   20,017 16,096 17,149 21,274
Deferred tax assets     2,023   2,023 1,778    
Oracle | Settled Litigation                
Segment Reporting Information                
Payments received $ 2,350   2,350          
Zerto                
Segment Reporting Information                
Total fair value of consideration   $ 416   $ 416        
(Accumulated Deficit) Retained Earnings                
Segment Reporting Information                
Stockholders' equity     (5,597)   $ (5,597) (8,375) (7,632) (5,899)
Cumulative Effect, Period of Adoption, Adjustment                
Segment Reporting Information                
Allowance for credit loss           28 0 0
Stockholders' equity           (25) [1]   (2,181) [2]
Cumulative Effect, Period of Adoption, Adjustment | (Accumulated Deficit) Retained Earnings                
Segment Reporting Information                
Stockholders' equity           (25) [1] $ 43 [3] $ (2,181) [2]
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13                
Segment Reporting Information                
Allowance for credit loss           28    
Stockholders' equity           25    
Deferred tax assets           3    
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13 | (Accumulated Deficit) Retained Earnings                
Segment Reporting Information                
Stockholders' equity           $ 25    
Accounts Receivable | Major Customers | Three largest outsourced manufacturer                
Segment Reporting Information                
Number of largest distributor and reseller receivable balances or largest outsourced manufacturer receivable balances | receivableBalance         3      
Concentration of credit risk (as a percent)         92.00% 89.00%    
Manufacturer receivables     $ 947   $ 947 $ 687    
Minimum                
Segment Reporting Information                
Amortization period     2 years   2 years      
Estimated useful life for finite-lived intangible assets         1 year      
Standard warranty term         1 year      
Minimum | Buildings and improvements                
Segment Reporting Information                
Estimated useful life for property, plant and equipment         5 years      
Minimum | Machinery and equipment, including equipment held for lease                
Segment Reporting Information                
Estimated useful life for property, plant and equipment         3 years      
Minimum | Capitalized internal use software                
Segment Reporting Information                
Estimated useful life for property, plant and equipment         3 years      
Maximum                
Segment Reporting Information                
Amortization period     5 years   5 years      
Estimated useful life for finite-lived intangible assets         10 years      
Standard warranty term         5 years      
Maximum | Buildings and improvements                
Segment Reporting Information                
Estimated useful life for property, plant and equipment         40 years      
Maximum | Machinery and equipment, including equipment held for lease                
Segment Reporting Information                
Estimated useful life for property, plant and equipment         15 years      
Maximum | Capitalized internal use software                
Segment Reporting Information                
Estimated useful life for property, plant and equipment         5 years      
[1] For fiscal 2021, $25 million represents the impact of the adoption of the accounting standard on the measurement of credit losses on financing receivables.
[2] For fiscal 2019, includes $2.3 billion related to an addition to accumulated deficit as a result of the adoption of an accounting standard update for Income Taxes and $124 million related to a reduction to accumulated deficit as a result of the adoption of the new revenue accounting standard.
[3] For fiscal 2020, $43 million represents the impact of the adoption of an accounting standard update that allows for the reclassification of stranded tax effects from accumulated other comprehensive loss to accumulated deficit.