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LEASES Supplemental Information related to leases (Details)
$ in Millions
3 Months Ended
Jan. 31, 2020
USD ($)
Leases [Abstract]  
Operating Lease, Payments $ 11
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability $ 12
Operating Lease, Weighted Average Remaining Lease Term 6 years 3 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent 3.00%