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Fair Value - Schedule of Assets and Liabilities on a Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($)
$ in Millions
Oct. 31, 2021
Oct. 31, 2020
Assets    
Total assets $ 3,058 $ 2,762
Liabilities    
Total liabilities 127 194
Time deposits    
Assets    
Total assets 806 939
Money market funds    
Assets    
Total assets 1,495 1,167
Equity Securities    
Assets    
Total assets 186 0
Foreign bonds    
Assets    
Total assets 122 125
Other debt securities    
Assets    
Total assets 42 21
Interest rate contracts    
Assets    
Total assets 95 220
Liabilities    
Total liabilities 0 2
Foreign exchange contracts    
Assets    
Total assets 308 290
Liabilities    
Total liabilities 127 189
Other derivatives    
Assets    
Total assets 4 0
Liabilities    
Total liabilities 0 3
Level 1    
Assets    
Total assets 1,552 1,167
Liabilities    
Total liabilities 0 0
Level 1 | Time deposits    
Assets    
Total assets 0 0
Level 1 | Money market funds    
Assets    
Total assets 1,495 1,167
Level 1 | Equity Securities    
Assets    
Total assets 57 0
Level 1 | Foreign bonds    
Assets    
Total assets 0 0
Level 1 | Other debt securities    
Assets    
Total assets 0 0
Level 1 | Interest rate contracts    
Assets    
Total assets 0 0
Liabilities    
Total liabilities 0 0
Level 1 | Foreign exchange contracts    
Assets    
Total assets 0 0
Liabilities    
Total liabilities 0 0
Level 1 | Other derivatives    
Assets    
Total assets 0 0
Liabilities    
Total liabilities 0 0
Level 2    
Assets    
Total assets 1,335 1,574
Liabilities    
Total liabilities 127 194
Level 2 | Time deposits    
Assets    
Total assets 806 939
Level 2 | Money market funds    
Assets    
Total assets 0 0
Level 2 | Equity Securities    
Assets    
Total assets 0 0
Level 2 | Foreign bonds    
Assets    
Total assets 122 125
Level 2 | Other debt securities    
Assets    
Total assets 0 0
Level 2 | Interest rate contracts    
Assets    
Total assets 95 220
Liabilities    
Total liabilities 0 2
Level 2 | Foreign exchange contracts    
Assets    
Total assets 308 290
Liabilities    
Total liabilities 127 189
Level 2 | Other derivatives    
Assets    
Total assets 4 0
Liabilities    
Total liabilities 0 3
Level 3    
Assets    
Total assets 171 21
Liabilities    
Total liabilities 0 0
Level 3 | Time deposits    
Assets    
Total assets 0 0
Level 3 | Money market funds    
Assets    
Total assets 0 0
Level 3 | Equity Securities    
Assets    
Total assets 129 0
Level 3 | Foreign bonds    
Assets    
Total assets 0 0
Level 3 | Other debt securities    
Assets    
Total assets 42 21
Level 3 | Interest rate contracts    
Assets    
Total assets 0 0
Liabilities    
Total liabilities 0 0
Level 3 | Foreign exchange contracts    
Assets    
Total assets 0 0
Liabilities    
Total liabilities 0 0
Level 3 | Other derivatives    
Assets    
Total assets 0 0
Liabilities    
Total liabilities $ 0 $ 0