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Document and Entity Information - shares
9 Months Ended
Feb. 28, 2017
Mar. 20, 2017
Document And Entity Information [Abstract]    
Document Type 10-Q  
Document Period End Date Feb. 28, 2017  
Amendment Flag false  
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q3  
Entity Registrant Name FedEx Corporation  
Entity Central Index Key 0001048911  
Current Fiscal Year End Date --05-31  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   267,374,954
Trading Symbol FDX