Employee Benefit Plans Employee Benefit Plans (Components of Net Periodic Benefit Costs - Health Care Plans) (Details) $ in Millions	12 Months Ended
	Nov. 30, 2016 USD ($) employee	Nov. 30, 2015 USD ($)	Nov. 30, 2014 USD ($)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 1.8	$ 1.4	$ 1.5
Interest costs on benefit obligation	9.6	12.9	13.1
Defined Benefit Plan, Expected Return on Plan Assets	(15.3)	(15.7)	(14.9)
Amortization of net gain	4.6	5.4	3.9
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	0.1	0.4	0.0
Total	$ 0.6	3.6	3.6
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Number of Participants | employee	64
Interest costs on benefit obligation	$ 0.2	0.3	0.3
Amortization of prior service credits	0.0	(0.1)	(0.3)
Amortization of net gain	(1.0)	(1.2)	(1.4)
Total	$ (0.8)	$ (1.0)	$ (1.4)