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Taxes on Earnings - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Oct. 31, 2021
Oct. 31, 2020
Oct. 31, 2019
Income Tax Examination [Line Items]      
Net income tax charges (benefits) $ (294) $ (362) $ 152
Income tax benefits on restructuring charges, separation costs, transformation costs and acquisition and other related charges 180 174  
Change in enacted tax rate 39 40  
Pre-Separation tax matters 32 66 274
Litigation settlement and early debt prepayment premium 337    
Income tax charges related to change in valuation allowance 244    
Tax expense due to litigation settlement 93    
Tax charges related to changes in valuation allowances as a result of the Tax Act     488
Income tax charges related to future withholding costs on intercompany distributions     40
Income tax benefits from transformation costs, acquisition, disposition and other related charges     104
Income tax benefits, reduced rates for subsidiaries in certain countries $ 889 $ 521 $ 837
Income tax benefits, reduced rates for subsidiaries in certain countries (in dollars per share) $ 0.67 $ 0.40 $ 0.61
Undistributed earnings from non-U.S. operations $ 8,900    
Tax Matter Agreement, cash received during period 50 $ 50 $ 200
Foreign      
Income Tax Examination [Line Items]      
Change in enacted tax rate $ 157    
Foreign | India      
Income Tax Examination [Line Items]      
Change in enacted tax rate   $ 57