Cover Page - shares	3 Months Ended
	Sep. 26, 2020	Oct. 16, 2020
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 26, 2020
Document Transition Report	false
Entity File Number	1-6544
Entity Registrant Name	Sysco Corporation
Entity Incorporation, State or Country Code	DE
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
City Area Code	281
Local Phone Number	584-1390
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		509,358,649
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Entity Central Index Key	0000096021
Current Fiscal Year End Date	--07-03
Amendment Flag	false
Common Stock
Document Information [Line Items]
Title of each class	Common stock, $1.00 Par Value
Trading Symbol	SYY
Security Exchange Name	NYSE
Senior Notes, 1.25% Due 2023
Document Information [Line Items]
Title of each class	1.25% Notes due June 2023
Trading Symbol	SYY 23
Security Exchange Name	NYSE