Employee Benefit Plans (Tables)

3 Months Ended

Aug. 31, 2017

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs

The following table sets forth components of the net periodic (benefit) cost 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. 

	U.S. Pension Plan						UK Pension Plan						Post-Retirement Benefits
	Three months ended						Three months ended						Three months ended
	August 31,			August 31,			August 31,			August 31,			August 31,		August 31,
	2017			2016			2017			2016			2017		2016
Components of net periodic (benefit) cost:
Service cost	$	—		$	—		$	—		$	—		$	0.0	$	0.0
Interest cost	0.7			0.8			0.3			0.3			0.3		0.3
Expected return on assets	(1.5		)	(1.5		)	(0.3		)	(0.3		)	—		—
Amortization of (gain) loss	0.3			0.2			0.3			0.2			0.0		0.6
Net periodic (benefit) cost	$	(0.5	)	$	(0.5	)	$	0.3		$	0.2		$	0.3	$	0.9