Summary of Significant Accounting Policies, (As Restated for fiscal 2014 and 2013) - Narrative - AR1 Research and Development (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended	9 Months Ended	12 Months Ended
	Aug. 31, 2015	May. 31, 2015	May. 31, 2015	Aug. 31, 2015	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2013
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Research and development expenses	$ 8.3	$ 2.2	$ 2.2	$ 10.5	$ 32.1	$ 0.0	$ 0.0
Company [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Research and development expenses					74.4	$ 51.9	$ 42.9
Company [Member] | AR-1 [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Research and development expenses					48.2
Company [Member] | AR-1 [Member] | Allocated Costs [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Research and development expenses					16.1
Company [Member] | AR-1 [Member] | Non-Allocated Costs [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Research and development expenses					$ 32.1