v3.26.1
COVER - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2026
Jun. 04, 2026
Sep. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Mar. 31, 2026    
Current Fiscal Year End Date --03-31    
Document Transition Report false    
Entity File Number 001-42764    
Registrant Name MCGRAW HILL, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 87-1259704    
Entity Address, Address Line One 8787 Orion Place    
Entity Address, City or Town Columbus    
Entity Address, State or Province OH    
Entity Address, Postal Zip Code 43240    
City Area Code 614    
Local Phone Number 430-4000    
Title of 12(b) Security Common stock, par value $0.01    
Trading Symbol MH    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 318
Entity Common Stock, Shares Outstanding   191,276,168  
Central Index Key 0001951070    
Amendment Flag false    
Document Fiscal Year Focus 2026    
Document Fiscal Period Focus FY