Employee Benefit Plans - Schedule of Components of Net Periodic Benefit Cost for OPEB (Details) - Other Postretirement Benefit Plans, Defined Benefit [Member] - USD ($) $ in Millions	12 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Interest costs on benefit obligation	$ 0.2	$ 0.2	$ 0.2
Amortization of net gain	1.3	0.9	1.0
Total	$ (1.1)	$ (0.7)	$ (0.8)