Segment Information (Details) - Schedule of segment reporting information - USD ($) $ in Millions		3 Months Ended
		Aug. 31, 2015	Aug. 31, 2014	May. 31, 2015	May. 31, 2014
Segment Reporting Information [Line Items]
Revenues		$ 191.2	$ 190.5
Bad debt expense		1.5	1.9
Depreciation and amortization	[1]	17.3	20.3
Segment operating income (loss)		(79.5)	(86.8)
Segment assets		1,706.1	1,464.1
Goodwill		116.2	121.8	$ 116.3	$ 121.8
Expenditures for long-lived assets including royalty advances		18.2	23.3
Long-lived assets		675.2	704.7
Children's Book Publishing and Distribution
Segment Reporting Information [Line Items]
Revenues	[2]	68.1	59.0
Bad debt expense	[2]	0.4	0.5
Depreciation and amortization	[1],[2]	7.7	9.3
Segment operating income (loss)	[2]	(57.5)	(60.8)
Segment assets	[2]	470.0	485.8
Goodwill	[2]	40.9	46.3
Expenditures for long-lived assets including royalty advances	[2]	10.0	17.6
Long-lived assets	[2]	140.7	161.9
Education
Segment Reporting Information [Line Items]
Revenues	[2]	50.0	46.8
Bad debt expense	[2]	0.0	0.2
Depreciation and amortization	[1],[2]	2.8	2.9
Segment operating income (loss)	[2]	(2.8)	(2.6)
Segment assets	[2]	164.8	169.7
Goodwill	[2]	65.4	65.4
Expenditures for long-lived assets including royalty advances	[2]	1.5	1.7
Long-lived assets	[2]	86.4	91.4
Overhead
Segment Reporting Information [Line Items]
Revenues	[2],[3]	0.0	0.0
Bad debt expense	[2],[3]	0.0	0.0
Depreciation and amortization	[1],[2],[3]	4.8	5.7
Segment operating income (loss)	[2],[3]	(16.5)	(20.4)
Segment assets	[2],[3]	821.7	540.9
Goodwill	[2],[3]	0.0	0.0
Expenditures for long-lived assets including royalty advances	[2],[3]	4.7	0.9
Long-lived assets	[2],[3]	380.2	384.5
Total Domestic
Segment Reporting Information [Line Items]
Revenues		118.1	105.8
Bad debt expense		0.4	0.7
Depreciation and amortization	[1]	15.3	17.9
Segment operating income (loss)		(76.8)	(83.8)
Segment assets		1,456.5	1,196.4
Goodwill		106.3	111.7
Expenditures for long-lived assets including royalty advances		16.2	20.2
Long-lived assets		607.3	637.8
International Segment
Segment Reporting Information [Line Items]
Revenues	[2]	73.1	84.7
Bad debt expense	[2]	1.1	1.2
Depreciation and amortization	[1],[2]	2.0	2.4
Segment operating income (loss)	[2]	(2.7)	(3.0)
Segment assets	[2]	249.6	267.7
Goodwill	[2]	9.9	10.1
Expenditures for long-lived assets including royalty advances	[2]	2.0	3.1
Long-lived assets	[2]	$ 67.9	$ 66.9

[1] Includes depreciation of property, plant and equipment and amortization of intangible assets, and prepublication and production costs.

[2] As discussed in Note 2, “Discontinued Operations,” the Company closed or sold several operations during fiscal 2015. All of these businesses are classified as discontinued operations in the Company’s financial statements and, as such, are not reflected in this table.

[3] Overhead includes all domestic corporate amounts not allocated to segments, including expenses and costs related to the management of corporate assets. Unallocated assets are principally comprised of deferred income taxes and property, plant and equipment related to the Company’s headquarters in the metropolitan New York area, its fulfillment and distribution facilities located in Missouri and its facility located in Connecticut.