MULTIEMPLOYER EMPLOYEE BENEFIT PLANS (Details) - Multiemployer Defined Benefit Pension Plans - USD ($) $ in Millions	12 Months Ended
Jun. 29, 2019	Jun. 30, 2018
Multiemployer Plans [Line Items]
Percentage of employees participating in multi-employer plans	12.00%
New York State Teamsters Conference Pension and Retirement Fund
Multiemployer Plans [Line Items]
Withdrawal liability accrued		$ 37.3

Percentage of current employees that are participants in multiemployer plans. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

No definition available.

Name:	syy_PercentageOfEmployeesParticipatingInMultiemployerPlans
Namespace Prefix:	syy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration