Employee Benefit Plans Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2019	Aug. 31, 2018
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service costs	$ 0.8	$ 0.6	$ 2.2	$ 1.9
Interest costs	2.5	2.2	7.6	6.7
Expected return on plan assets	(4.0)	(3.9)	(11.8)	(11.7)
Amortization of net actuarial (gain) loss	1.1	1.4	3.4	4.1
Net periodic cost (benefit)	0.4	0.3	1.4	1.0
Postretirement Health Coverage [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service costs	0.0	0.0	0.0	0.0
Interest costs	0.1	0.1	0.2	0.2
Expected return on plan assets	0.0	0.0	0.0	0.0
Amortization of net actuarial (gain) loss	(0.4)	(0.2)	(1.0)	(0.7)
Net periodic cost (benefit)	$ (0.3)	$ (0.1)	$ (0.8)	$ (0.5)