Document And Entity Information - USD ($)	12 Months Ended
	May 31, 2018	Jun. 30, 2018	Nov. 30, 2017
Document Information [Line Items]
Entity Registrant Name	SCHOLASTIC CORP
Document Type	10-K
Current Fiscal Year End Date	--05-31
Entity Public Float			$ 1,216,319,611
Amendment Flag	false
Entity Central Index Key	0000866729
Entity Current Reporting Status	No
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Well-known Seasoned Issuer	Yes
Document Period End Date	May 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Common Class A [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		1,656,200
Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		33,332,614