Goodwill and Other Intangibles (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	3 Months Ended	6 Months Ended
	Nov. 30, 2013	Nov. 30, 2013 Children's Book Publishing and Distribution [Member]	Nov. 30, 2013 Finite-Lived Intangible Assets [Member]	Nov. 30, 2012 Finite-Lived Intangible Assets [Member]
Goodwill and Other Intangibles (Details) [Line Items]
Goodwill, Impairment Loss	$ (13.4)	$ 13.4
Reporting Unit, Amount of Fair Value in Excess of Carrying Amount		13.0
Reporting Unit, Carrying Value		66.9
Fair Value Inputs, Discount Rate		15.50%
Fair Value Inputs, Long-term Revenue Growth Rate		3.00%
Fair Value Inputs, Revenue Multiple		0.4
Amortization of Intangible Assets			$ 1.2	$ 1.3
Finite-Lived Intangible Asset, Useful Life	7 years