Debt - Senior Notes Offering (Details) - Senior Notes - Senior Notes, 3.65% in Canada $ in Millions	Sep. 25, 2018 CAD ($)	Sep. 25, 2018 USD ($)
Debt Instrument [Line Items]
Debt instrument, face amount	$ 500,000,000.0	$ 384.6
Coupon Rate	3.65%	3.65%
Pricing (percentage of par)	99.962%	99.962%
Period prior to maturity for early redemption	2 months
Percent of principal due upon early repayment	100.00%
Percent of principal due after applicable date	100.00%

Debt Instrument, Covenant Terms, Period Prior To Maturity For Early Redemption

No definition available.

Name:	syy_DebtInstrumentCovenantTermsPeriodPriorToMaturityForEarlyRedemption
Namespace Prefix:	syy_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Covenant Terms, Principal Repayment Percentage After Applicable Date

+ References

No definition available.

+ Details

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

- Definition

Debt Instrument, Covenant Terms, Principal Repayment Percentage Prior To Maturity For Early Redemption

+ References

No definition available.

+ Details

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

- Definition

Debt Instrument, Issuance Percentage of Par

+ References

No definition available.

+ Details

Name:	syy_DebtInstrumentIssuancePercentageofPar
Namespace Prefix:	syy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=syy_SeniorNotes3.65InCanadaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: