Fair Value Measurements (Tables)

12 Months Ended

May 31, 2014

Fair Value Disclosures [Abstract]

Schedule of Fair Value Measurements

The following tables present non-financial assets that were measured and recorded at fair value on a non-recurring basis and the total impairment losses and additions recognized on those assets:

	Net carrying value as of		Fair value measured and recorded using						Impairment losses for fiscal year ended
	May 31, 2014		Level 1		Level 2		Level 3		May 31, 2014		Additions due to acquisitions
Investments	$	—	$	—	$	—	$	—	$	5.8	$	1.0
Property, plant and equipment, net	—		—		—		—		7.6		—
Goodwill	—		—		—		—		13.4		—
Prepublication assets	—		—		—		—		5.7		—

	Net carrying value as of		Fair value measured and recorded using						Impairment losses for fiscal year ended
	May 31, 2013		Level 1		Level 2		Level 3		May 31, 2013		Additions due to acquisitions
Other intangible assets	$	0.3	$	—	$	—	$	0.3	$	—	$	0.3
Property, plant and equipment, net	—		—		—		—		5.2		—
Prepublication assets	—		—		—		—		2.0		—

	Net carrying value as of		Fair value measured and recorded using						Impairment losses for fiscal year ended
	May 31, 2012		Level 1		Level 2		Level 3		May 31, 2012		Additions due to acquisitions
Goodwill	$	2.7	$	—	$	—	$	2.7	$	—	$	2.7
Other intangible assets impairment	4.9		—		—		4.9		6.8		—
Other intangibles	5.4		—		—		5.4		—		5.4
Production assets	0.6		—		—		0.6		4.0		—
Prepublication assets	—		—		—		—		0.8		—
Investments	—		—		—		—		1.3		—