Contingencies and Commitments (Details) $ in Millions	12 Months Ended
	Nov. 30, 2019 USD ($) employee	Nov. 30, 2018 USD ($)	Nov. 30, 2017 USD ($)
Other Commitments [Line Items]
Operating Leases, Rent Expense	$ 5.7	$ 5.7	$ 6.2
Total non-cancelable operating leases	16.0
Operating Leases, Future Minimum Payments Due, Next Twelve Months	4.2
Operating Leases, Future Minimum Payments, Due in Two Years	2.8
Operating Leases, Future Minimum Payments, Due in Three Years	2.3
Operating Leases, Future Minimum Payments, Due in Four Years	1.5
Operating Leases, Future Minimum Payments, Due in Five Years	0.8
Operating Leases, Future Minimum Payments, Due Thereafter	4.4
Accrual for Environmental Loss Contingencies	$ 1.4	$ 1.5
Number of employees employed by the Company | employee	1,850
Percent of employees covered by a collective bargaining agreement	12.00%
Minimum [Member]
Other Commitments [Line Items]
Lessee, Operating Lease, Renewal Term	5 years
Maximum [Member]
Other Commitments [Line Items]
Lessee, Operating Lease, Renewal Term	20 years