Goodwill and Other Intangibles (Details) - Schedule of activity in goodwill - USD ($) $ in Millions		12 Months Ended
		May 31, 2016	May 31, 2015
Goodwill [Roll Forward]
Gross beginning balance		$ 155.9	$ 156.0
Accumulated impairment		(39.6)	(34.2)
Beginning balance		116.3	121.8
Goodwill impairment	[1]	0.0	(5.4)
Foreign currency translation		(0.1)	(0.1)
Gross ending balance		155.8	155.9
Accumulated impairment		(39.6)	(39.6)
Ending balance		$ 116.2	$ 116.3

[1] In fiscal 2015, the Company recognized an impairment of $5.4 of goodwill associated with a reporting unit within the former Media, Licensing and Advertising segment now included in the Children’s Book Publishing and Distribution segment.