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Fair Value - Schedule of Assets and Liabilities on a Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($)
$ in Millions
Apr. 30, 2021
Oct. 31, 2020
Assets    
Total assets $ 3,392 $ 2,762
Liabilities    
Total liabilities 299 194
Time deposits    
Assets    
Total assets 893 939
Money market funds    
Assets    
Total assets 1,955 1,167
Foreign bonds    
Assets    
Total assets 127 125
Other debt securities    
Assets    
Total assets 18 21
Interest rate contracts    
Assets    
Total assets 150 220
Liabilities    
Total liabilities 0 2
Foreign exchange contracts    
Assets    
Total assets 151 290
Liabilities    
Total liabilities 299 189
Other derivatives    
Assets    
Total assets 2 0
Liabilities    
Total liabilities 0 3
Equity Securities    
Assets    
Total assets 96 0
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Assets    
Total assets 1,959 1,167
Liabilities    
Total liabilities 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Time deposits    
Assets    
Total assets 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money market funds    
Assets    
Total assets 1,955 1,167
Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign bonds    
Assets    
Total assets 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other debt securities    
Assets    
Total assets 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate contracts    
Assets    
Total assets 0 0
Liabilities    
Total liabilities 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign exchange contracts    
Assets    
Total assets 0 0
Liabilities    
Total liabilities 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other derivatives    
Assets    
Total assets 0 0
Liabilities    
Total liabilities 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities    
Assets    
Total assets 4 0
Significant Other Observable Remaining Inputs (Level 2)    
Assets    
Total assets 1,323 1,574
Liabilities    
Total liabilities 299 194
Significant Other Observable Remaining Inputs (Level 2) | Time deposits    
Assets    
Total assets 893 939
Significant Other Observable Remaining Inputs (Level 2) | Money market funds    
Assets    
Total assets 0 0
Significant Other Observable Remaining Inputs (Level 2) | Foreign bonds    
Assets    
Total assets 127 125
Significant Other Observable Remaining Inputs (Level 2) | Other debt securities    
Assets    
Total assets 0 0
Significant Other Observable Remaining Inputs (Level 2) | Interest rate contracts    
Assets    
Total assets 150 220
Liabilities    
Total liabilities 0 2
Significant Other Observable Remaining Inputs (Level 2) | Foreign exchange contracts    
Assets    
Total assets 151 290
Liabilities    
Total liabilities 299 189
Significant Other Observable Remaining Inputs (Level 2) | Other derivatives    
Assets    
Total assets 2 0
Liabilities    
Total liabilities 0 3
Significant Other Observable Remaining Inputs (Level 2) | Equity Securities    
Assets    
Total assets 0 0
Significant Other Unobservable Remaining Inputs (Level 3)    
Assets    
Total assets 110 21
Liabilities    
Total liabilities 0 0
Significant Other Unobservable Remaining Inputs (Level 3) | Time deposits    
Assets    
Total assets 0 0
Significant Other Unobservable Remaining Inputs (Level 3) | Money market funds    
Assets    
Total assets 0 0
Significant Other Unobservable Remaining Inputs (Level 3) | Foreign bonds    
Assets    
Total assets 0 0
Significant Other Unobservable Remaining Inputs (Level 3) | Other debt securities    
Assets    
Total assets 18 21
Significant Other Unobservable Remaining Inputs (Level 3) | Interest rate contracts    
Assets    
Total assets 0 0
Liabilities    
Total liabilities 0 0
Significant Other Unobservable Remaining Inputs (Level 3) | Foreign exchange contracts    
Assets    
Total assets 0 0
Liabilities    
Total liabilities 0 0
Significant Other Unobservable Remaining Inputs (Level 3) | Other derivatives    
Assets    
Total assets 0 0
Liabilities    
Total liabilities 0 0
Significant Other Unobservable Remaining Inputs (Level 3) | Equity Securities    
Assets    
Total assets $ 92 $ 0