Intangible Assets and Goodwill (Narrative) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Nov. 30, 2017	Aug. 31, 2016	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2015
Finite-Lived Intangible Assets [Line Items]
Intangible assets, amortization expense			$ 33,100,000	$ 28,200,000	$ 29,600,000
Goodwill [Line Items]
Impairment of goodwill and intangible assets			$ 0	92,000,000	$ 0
Application Development and Deployment [Member]
Goodwill [Line Items]
Impairment of goodwill and intangible assets	$ 92,000,000			92,000,000
Modulus [Member] | Purchased Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets		$ 5,100,000		$ 5,100,000