Leases (Undiscounted operating lease liability maturity II) (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Leases [Abstract]
Total undiscounted operating lease payments	$ 356,433
Less: Imputed interest to be recognized as operating lease expense	(55,014)
Operating lease liabilities	$ 301,419	$ 0	$ 318,800
Weighted average remaining lease term	13 years 8 months 12 days
Weighted average discount rate	2.40%