Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Rent expense net of sublease income	$ 8.9	$ 6.8	$ 6.9

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

No definition available.

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration