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Document And Entity Information - USD ($)
 12 Months Ended
May. 31, 2015
Jun. 30, 2015
Nov. 30, 2014
Document Information [Line Items]      
Entity Registrant Name SCHOLASTIC CORP    
Document Type 10-K    
Current Fiscal Year End Date --05-31    
Entity Public Float     $ 980,329,256
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, 2015    
Document Fiscal Year Focus 2015    
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   31,492,730