| Document and Entity Information | Mar. 06, 2023 |
| Document And Entity Information [Line Items] | |
| Entity Registrant Name | FEDEX CORP |
| Amendment Flag | false |
| Entity Central Index Key | 0001048911 |
| Current Fiscal Year End Date | --05-31 |
| Document Type | 8-K |
| Document Period End Date | Mar. 06, 2023 |
| Entity File Number | 1-15829 |
| Entity Incorporation State Country Code | DE |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock Par Value Zero Point One Zero Per Share [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common Stock, par value $0.10 per share |
| Trading Symbol | FDX |
| Security Exchange Name | NYSE |
| Zero Point Four Five Zero Percentage Notes Due Two Thousand Twenty Five [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 0.450% Notes due 2025 |
| Trading Symbol | FDX 25A |
| Security Exchange Name | NYSE |
| One Point Six Two Five Percentage Notes Due Two Thousand Twenty Seven [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 1.625% Notes due 2027 |
| Trading Symbol | FDX 27 |
| Security Exchange Name | NYSE |
| Zero Point Four Five Zero Percentage Notes Due Two Thousand Twenty Nine [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 0.450% Notes due 2029 |
| Trading Symbol | FDX 29A |
| Security Exchange Name | NYSE |
| One Point Three Zero Zero Percentage Notes Due Two Thousand Thirty One [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 1.300% Notes due 2031 |
| Trading Symbol | FDX 31 |
| Security Exchange Name | NYSE |
| Zero Point Nine Five Zero Percentage Notes Due Two Thousand Thirty Three [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 0.950% Notes due 2033 |
| Trading Symbol | FDX 33 |
| Security Exchange Name | NYSE |
