Leases - Components of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	May 31, 2020	May 31, 2020
Leases [Abstract]
Operating lease cost	$ 10.5	$ 20.6
Amortization of ROU assets	2.3	4.5
Interest on lease liabilities	1.2	2.3
Net lease cost	$ 14.0	$ 27.4