Goodwill and Other Intangibles (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 31, 2014	May 31, 2013	May 31, 2012	May 31, 2014 Children's Book Publishing and Distribution [Member]		Nov. 30, 2013 Children's Book Publishing and Distribution [Member]	May 31, 2013 Children's Book Publishing and Distribution [Member]		May 31, 2012 Children's Book Publishing and Distribution [Member]
Goodwill and Other Intangibles (Details) [Line Items]
Goodwill impairment	$ 13.4	$ 0		$ 13.4
Difference between fair value and carrying value						13.0
Goodwill, net carrying value	144.5	157.9	157.7	40.9	[1]	66.9	54.3	[1]	54.3	[1]
Discount rate				15.50%
Perpetual growth rate				3.00%
Amortization expense	$ 2.4	$ 2.5	$ 6.5
Useful life of intangible assets	7 years

[1] As discussed in Note 3, “Discontinued Operations,” the Company closed or sold several operations during the first quarter of fiscal 2012 and the fourth quarter of fiscal 2013. All of these businesses are classified as discontinued operations in the Company’s financial statements and, as such, are not reflected in this table.