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Taxes on Earnings - Deferred Tax Assets and Liabilities included in Condensed Consolidated Balance Sheets (Details) - USD ($)
$ in Millions
Oct. 31, 2021
Oct. 31, 2020
Current and long term deferred tax assets and liabilities    
Deferred tax assets $ 2,023 $ 1,778
Deferred tax liabilities (494) (290)
Net deferred tax assets and liabilities 1,529 1,488
Operating loss carryforwards    
Adjustment to reduce deferred tax asset 93 118
Valuation allowance on deferred tax assets 7,368 $ 7,724
State    
Operating loss carryforwards    
Operating loss carryforwards 3,200  
Capital loss carryforwards 6,000  
State | Operating loss carryforwards    
Operating loss carryforwards    
Valuation allowance on deferred tax assets 171  
State | Capital loss carryforwards    
Operating loss carryforwards    
Valuation allowance on deferred tax assets 181  
Foreign    
Operating loss carryforwards    
Operating loss carryforwards 19,800  
Capital loss carryforwards 112  
Foreign | Operating loss carryforwards    
Operating loss carryforwards    
Valuation allowance on deferred tax assets 4,400  
Foreign | Capital loss carryforwards    
Operating loss carryforwards    
Valuation allowance on deferred tax assets 33  
Federal    
Operating loss carryforwards    
Operating loss carryforwards 555  
Capital loss carryforwards 6,000  
Federal | Capital loss carryforwards    
Operating loss carryforwards    
Valuation allowance on deferred tax assets $ 1,300