| Document and Entity Information | Aug. 11, 2020 |
| Document And Entity Information [Line Items] | |
| Entity Registrant Name | SYSCO CORP |
| Amendment Flag | false |
| Entity Central Index Key | 0000096021 |
| Document Type | 8-K |
| Document Period End Date | Aug. 11, 2020 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 1-06544 |
| Entity Tax Identification Number | 74-1648137 |
| Entity Address, Address Line One | 1390 Enclave Parkway |
| Entity Address, City or Town | Houston |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 77077-2099 |
| City Area Code | (281) |
| Local Phone Number | 584-1390 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common stock, $1.00 Par Value |
| Trading Symbol | SYY |
| Security Exchange Name | NYSE |
| Deferrable Notes [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 1.25% Notes due June 2023 |
| Trading Symbol | SYY23 |
| Security Exchange Name | NYSE |
