Employee Benefit Plans (Tables)

6 Months Ended

Nov. 30, 2018

Retirement Benefits [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 postretirement benefits, consisting of certain healthcare and life insurance benefits provided by the Company to its eligible retired United States-based employees (the “Postretirement Benefits”).

	U.S. Pension Plan					UK Pension Plan						Postretirement Benefits
	Three months ended November 30,					Three months ended November 30,						Three months ended November 30,
	2018		2017			2018			2017			2018			2017
Components of net periodic (benefit) cost:
Service cost	$	—	$	—		$	—		$	—		$	0.0		$	0.0
Interest cost	—		0.8			0.3			0.2			0.2			0.2
Expected return on assets	—		(1.5		)	(0.3		)	(0.2		)	—			—
Net amortization of prior service credit	—		—			—			—			(0.1		)	—
Benefit cost of settlement event	—		15.4			—			—			—			—
Amortization of (gains) losses	—		0.3			0.2			0.3			—			0.0
Net periodic (benefit) cost	$	—	$	15.0		$	0.2		$	0.3		$	0.1		$	0.2

	U.S. Pension Plan					UK Pension Plan						Postretirement Benefits
	Six months ended November 30,					Six months ended November 30,						Six months ended November 30,
	2018		2017			2018			2017			2018			2017
Components of net periodic (benefit) cost:
Service cost	$	—	$	—		$	—		$	—		$	0.0		$	0.0
Interest cost	—		1.5			0.5			0.5			0.4			0.5
Expected return on assets	—		(3.0		)	(0.5		)	(0.5		)	—			—
Net amortization of prior service credit	—		—			—			—			(0.1		)	—
Benefit cost of settlement event	—		15.4			—			—			—			—
Amortization of (gains) losses	—		0.6			0.4			0.6			—			0.0
Net periodic (benefit) cost	$	—	$	14.5		$	0.4		$	0.6		$	0.3		$	0.5