Debt (Details) - USD ($)	3 Months Ended
Sep. 29, 2018	Jun. 30, 2018
Debt [Line Items]
Maximum board-authorized aggregate commercial paper limit	$ 2,000,000,000
Carrying value of total debt		$ 8,300,000,000
Aggregate outstanding commercial paper and short-term debt minimum amount outstanding during period	0
Maximum amount outstanding	669,000,000
Commercial Paper
Debt [Line Items]
Carrying value of total debt	$ 0

Debt [Line Items]

No definition available.

Name:	syy_DebtLineItems
Namespace Prefix:	syy_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum limit of commercial paper that can be issued in the aggregate as authorized by the Board.

+ References

No definition available.

+ Details

Name:	syy_MaximumCommercialPaperLimit
Namespace Prefix:	syy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, the minimum amount borrowed at any time during the period.

+ References

No definition available.

+ Details

Name:	syy_Shorttermdebtminimumamountoutstandingduringperiod
Namespace Prefix:	syy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13,16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_DebtAndCapitalLeaseObligations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, the maximum amount borrowed at any time during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_CommercialPaperMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: