Employee Benefit Plans - Schedule of Changes in Benefit Obligation, Plan Assets, and Funded Status 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
Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 5.9	$ 6.9
Interest cost	0.2	0.2	$ 0.2
Actuarial loss (gain)	0.4	(0.4)
Benefits and expenses paid net of retiree contributions	(0.6)	(0.8)
Benefit Obligation at End of Year	5.9	5.9	$ 6.9
Change in Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	0.0
Employer contributions	0.7	0.8
Benefits and expenses paid, net of retiree contributions	(0.7)	(0.8)
Fair Value of Plan Assets at End of Year	0.0	0.0
Funded Status at November 30	(5.9)	(5.9)
Amounts Recognized in the Consolidated Balance Sheets:
Current liability	(0.6)	(0.6)
Non-current liability	(5.3)	(5.3)
Net Amount Recognized	$ (5.9)	$ (5.9)