Document and Entity Information (USD $)
12 Months Ended
May 31, 2015
Jul. 22, 2015
Nov. 30, 2014
Document And Entity Information [Abstract]      
Entity Registrant Name GLOBAL PAYMENTS INC    
Entity Central Index Key 0001123360    
Current Fiscal Year End Date --05-31    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Period End Date May 31, 2015    
Document Fiscal Year Focus 2015    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding (shares)   65,119,074  
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 5,754,058,764