Accounts Receivable Accounts Receivable (Details) - USD ($) $ in Millions	12 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net	$ 99.5	$ 105.3
Allowance for doubtful accounts	1.4	1.3
Write-offs of uncollectible accounts receivable	0.2	0.3	$ 0.9
Provision for bad debts	$ (0.3)	$ (0.2)	$ (0.3)