Document and Entity Information - shares	9 Months Ended
	Feb. 28, 2022	Mar. 15, 2022
Document Information [Line Items]
Document Type	10-Q
Document Period End Date	Feb. 28, 2022
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Entity Registrant Name	FedEx Corporation
Entity Current Reporting Status	Yes
Entity File Number	1-15829
Entity Tax Identification Number	62-1721435
Entity Address, Address Line One	942 South Shady Grove Road
Entity Address, City or Town	Memphis
Entity Address, State or Province	TN
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		259,178,229
Entity Incorporation, State or Country Code	DE
Entity Interactive Data Current	Yes
Document Quarterly Report	true
Document Transition Report	false
Common Stock, Par Value $0.10 Per Share [Member]
Document Information [Line Items]
Trading Symbol	FDX
Title of 12(b) Security	Common Stock, par value $0.10 per share
Security Exchange Name	NYSE
0.450% Notes Due 2025 [Member]
Document Information [Line Items]
Trading Symbol	FDX 25A
Title of 12(b) Security	0.450% Notes due 2025
Security Exchange Name	NYSE
1.625% Notes Due 2027 [Member]
Document Information [Line Items]
Trading Symbol	FDX 27
Title of 12(b) Security	1.625% Notes due 2027
Security Exchange Name	NYSE
0.450% Notes Due 2029 [Member]
Document Information [Line Items]
Trading Symbol	FDX 29A
Title of 12(b) Security	0.450% Notes due 2029
Security Exchange Name	NYSE
1.300% Notes Due 2031 [Member]
Document Information [Line Items]
Trading Symbol	FDX 31
Title of 12(b) Security	1.300% Notes due 2031
Security Exchange Name	NYSE
0.950% Notes Due 2033 [Member]
Document Information [Line Items]
Trading Symbol	FDX 33
Title of 12(b) Security	0.950% Notes due 2033
Security Exchange Name	NYSE