Leases - Narrative (Details)	Oct. 31, 2020
Lessee, Lease, Description [Line Items]
Current operating lease liabilities, extensible list	us-gaap:OtherLiabilitiesCurrent
Non-current operating lease liability, extensible list	us-gaap:OtherLiabilitiesNoncurrent
Minimum
Lessee, Lease, Description [Line Items]
Operating lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease term	13 years