Employee Benefit Plans (Tables)

6 Months Ended

Nov. 30, 2014

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs

The following table sets forth components of the net periodic benefit costs for the periods indicated under the Company’s cash balance retirement plan for its United States employees meeting certain eligibility requirements (the “U.S. Pension Plan”) and the defined benefit pension plan of Scholastic Ltd., an indirect subsidiary of Scholastic Corporation located in the United Kingdom (the “UK Pension Plan” and, together with the U.S. Pension Plan, the “Pension Plans”). Also included are the post-retirement benefits, consisting of certain healthcare and life insurance benefits provided by the Company to its eligible retired United States-based employees (the “Post-Retirement Benefits”). The Pension Plans and Post-Retirement Benefits include participants associated with both continuing operations and discontinued operations. 

	Pension Plans Three months ended November 30,						Post-Retirement Benefits Three months ended November 30,
	2014			2013			2014		2013
Components of net periodic benefit (credit) cost:
Service cost	$	—		$	—		$	0.0	$	0.0
Interest cost	1.6			1.8			0.3		0.3
Expected return on assets	(2.2		)	(3.2		)	—		—
Net amortization of prior service credit	—			—			(0.0)		(0.0		)
Benefit cost of settlement event	3.7			—			—		—
Amortization of (gain) loss	0.4			0.5			0.3		0.6
Net periodic benefit (credit) cost	$	3.5		$	(0.9	)	$	0.6	$	0.9

	Pension Plans Six months ended November 30,						Post-Retirement Benefits Six months ended November 30,
	2014			2013			2014			2013
Components of net periodic benefit (credit) cost:
Service cost	$	—		$	—		$	0.0		$	0.0
Interest cost	3.4			3.6			0.6			0.7
Expected return on assets	(4.7		)	(6.3		)	—			—
Net amortization of prior service credit	—			—			(0.1		)	(0.1		)
Benefit cost of settlement event	3.7			—			—			—
Amortization of (gain) loss	0.7			0.9			0.7			1.2
Net periodic benefit (credit) cost	$	3.1		$	(1.8	)	$	1.2		$	1.8