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Document and Entity Information - shares
 3 Months Ended
Aug. 31, 2019
Sep. 13, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Document Period End Date Aug. 31, 2019  
Amendment Flag false  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q1  
Entity Registrant Name FEDEX CORP  
Entity Current Reporting Status Yes  
Entity File Number 1-15829  
Entity Tax Identification Number 621721435  
Entity Address, Address Line One 942 South Shady Grove Road  
Entity Address, City or Town Memphis  
Entity Address, State or Province Tennessee  
Entity Address, Postal Zip Code 38120  
City Area Code 901  
Local Phone Number 818-7500  
Entity Central Index Key 0001048911  
Current Fiscal Year End Date --05-31  
Entity Filer Category Large Accelerated Filer  
Entity Shell Company false  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   260,910,309
Trading Symbol FDX