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Document and Entity Information - USD ($)
$ in Billions
 3 Months Ended
Aug. 31, 2016
Sep. 20, 2016
Nov. 27, 2015
Document and Entity Information [Abstract]      
Document Type 10-Q    
Document Period End Date Aug. 31, 2016    
Amendment Flag false    
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus Q1    
Entity Registrant Name FedEx Corporation    
Entity Central Index Key 0001048911    
Current Fiscal Year End Date --05-31    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 40.6
Entity Common Stock, Shares Outstanding   265,759,372  
TradingSymbol FDX