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Commitments (Tables)
 12 Months Ended
Oct. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
Future Unconditional Purchase Obligations
As of October 31, 2020, unconditional purchase obligations were as follows:
Fiscal yearIn millions
2021$290 
2022116 
202347 
202435 
20255 
Thereafter6 
Total$499