SUMMARY OF ACCOUNTING POLICIES (Policies)	12 Months Ended
SUMMARY OF ACCOUNTING POLICIES (Policies)	Jun. 30, 2018
Accounting Policies [Abstract]
Business and Consolidation	Business and Consolidation Sysco Corporation, acting through its subsidiaries and divisions (Sysco or the company), is engaged in the marketing and distribution of a wide range of food and related products primarily to the foodservice or food-away-from-home industry. These services are performed for over 600,000 customers from 332 distribution facilities located throughout North America and Europe. Sysco’s fiscal year ends on the Saturday nearest to June 30^th. This resulted in a 52-week year ended June 30, 2018 for fiscal 2018, a 52-week year ended July 1, 2017 for fiscal 2017, and a 53-week year ended July 2, 2016 for fiscal 2016. The accompanying financial statements include the accounts of Sysco and its consolidated subsidiaries. All significant intercompany transactions and account balances have been eliminated. The preparation of financial statements in conformity with generally accepted accounting principles (GAAP) requires management to make estimates that affect the reported amounts of assets, liabilities, sales and expenses. Actual results could differ from the estimates used.
Fiscal period	Sysco’s fiscal year ends on the Saturday nearest to June 30^th. This resulted in a 52-week year ended June 30, 2018 for fiscal 2018, a 52-week year ended July 1, 2017 for fiscal 2017, and a 53-week year ended July 2, 2016 for fiscal 2016.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash includes cash equivalents such as cash deposits, time deposits, certificates of deposit, commercial paper, high-quality money market funds and all highly liquid instruments with original maturities of three months or less, which are recorded at fair value.
Accounts Receivable	Accounts Receivable Accounts receivable consist primarily of trade receivables from customers and receivables from suppliers for marketing or incentive programs. Sysco determines the past due status of trade receivables based on contractual terms with each customer. Sysco evaluates the collectability of accounts receivable and determines the appropriate reserve for doubtful accounts based on a combination of factors. The company utilizes specific criteria to determine uncollectible receivables to be written off including whether a customer has filed for or been placed in bankruptcy, has had accounts referred to outside parties for collection or has had accounts past due over specified periods. In these instances, a specific allowance for doubtful accounts is recorded to reduce the receivable to the net amount reasonably expected to be collected. Allowances are recorded for all other receivables based on an analysis of historical trends of write-offs and recoveries.
Inventories	Inventories Inventories consisting primarily of finished goods include food and related products and lodging products held for resale and are valued at the lower of cost (first-in, first-out method) and net realizable value. Elements of costs include the purchase price of the product and freight charges to deliver the product to the company’s warehouses and are net of certain cash received from vendors (see “Vendor Consideration”).
Plant and Equipment	Plant and Equipment Capital additions, improvements and major replacements are classified as plant and equipment and are carried at cost. Depreciation is recorded using the straight-line method, which reduces the book value of each asset in equal amounts over its estimated useful life, and is included within operating expenses in the consolidated results of operations. Maintenance, repairs and minor replacements are charged to earnings when they are incurred. Upon the disposition of an asset, its accumulated depreciation is deducted from the original cost, and any gain or loss is reflected in current earnings.
Long-Lived Assets	Long-Lived Assets Management reviews long-lived assets for indicators of impairment whenever events or changes in circumstances indicate that the carrying value may not be recoverable. Cash flows expected to be generated by the related assets are estimated over the asset’s useful life based on updated projections on an undiscounted basis. For assets held for use, Sysco groups assets and liabilities at the lowest level for which cash flows are separately identifiable. If the evaluation indicates that the carrying value of the asset may not be recoverable, the potential impairment is measured using fair value. Impairment losses for assets to be disposed of, if any, are based on the estimated proceeds to be received, less costs of disposal.
Goodwill and Intangibles	Goodwill and Intangibles Goodwill represents the excess of cost over the fair value of net assets acquired. Goodwill and intangibles with indefinite lives are not amortized. Goodwill is assigned to the reporting units that are expected to benefit from the synergies of a business combination. The recoverability of goodwill and indefinite-lived intangibles is assessed annually, or more frequently as needed when events or changes have occurred that would suggest an impairment of carrying value, by determining whether the fair values of the applicable reporting units exceed their carrying values. This annual testing may be performed utilizing either a qualitative or quantitative assessment; however, if a qualitative assessment is performed and it is determined that the fair value of a reporting unit is more likely than not (i.e., a likelihood of more than 50 percent) to be less than its carrying amount, a quantitative test is performed. For fiscal 2018, the company analyzed its 7 operating segments and determined that 18 reporting units existed for purposes of evaluating for goodwill impairment. For certain reporting units, the company utilized a qualitative assessment. For the remaining reporting units, Sysco performed a quantitative test using a combination of the income and market approaches. The evaluation of fair value requires the use of projections, estimates and assumptions as to the future performance of the operations in performing a discounted cash flow analysis, as well as assumptions regarding sales and earnings multiples that would be applied in comparable acquisitions. The company does not believe the estimates used in the analysis are reasonably likely to change materially in the future, but Sysco will continue to assess the estimates in the future based on the expectations of the reporting units. In the fiscal 2018 assessment, the estimated fair values exceeded the carrying values for two international reporting units by 15% and 18%, respectively, with goodwill of $341.0 million in the aggregate as of June 30, 2018, recorded for these reporting units. Intangibles with definite lives are amortized over their useful lives in a manner consistent with underlying cash flow, which generally ranges from two to fifteen years. Management reviews finite-lived intangibles for indicators of impairment whenever events or changes in circumstances indicate that the carrying value may not be recoverable. Cash flows expected to be generated by the finite-lived intangibles are estimated over the intangible asset’s useful life based on updated projections on an undiscounted basis. If the evaluation indicates that the carrying value of the finite-lived intangible asset may not be recoverable, the potential impairment is measured at fair value.
Derivative Financial Instruments	Derivative Financial Instruments All derivatives are recognized as assets or liabilities within the consolidated balance sheets at fair value at their gross values. Gains or losses on derivative financial instruments designated as fair value hedges are recognized immediately in the consolidated results of operations, along with the offsetting gain or loss related to the underlying hedged item. Gains or losses on derivative financial instruments designated as cash flow hedges are recorded as a separate component of shareholders’ equity from inception of the hedges and are reclassified to the Consolidated Results of Operations in conjunction with the recognition of the underlying hedged item. For net investment hedges, the remeasurement gain or loss is recorded in AOCI and will be subsequently reclassified to net earnings when the hedged net investment is either sold or substantially liquidated.
Investments in Corporate-Owned Life Insurance	Investments in Corporate-Owned Life Insurance Investments in corporate-owned life insurance (COLI) policies are recorded at their cash surrender values as of each balance sheet date. Changes in the cash surrender value during the period are recorded as a gain or loss within operating expenses. Sysco has the ability and intent to hold certain of its COLI policies to maturity; therefore, the company does not record deferred tax balances related to cash surrender value gains or losses for these policies.
Treasury Stock	Treasury Stock The company records treasury stock purchases at cost. Shares removed from treasury are valued at cost using the average cost method.
Foreign Currency Translation	Foreign Currency Translation The assets and liabilities of all foreign subsidiaries are translated at current exchange rates. Related translation adjustments are recorded as a component of AOCI (loss).
Revenue Recognition	Revenue Recognition The company recognizes revenue from the sale of a product when it is considered to be realized or realizable and earned. The company determines these requirements to be met at the point at which the product is delivered to the customer. The company grants certain customers sales incentives such as rebates or discounts and treats these as a reduction of sales at the time the sale is recognized. Sales tax collected from customers is not included in revenue but rather recorded as a liability due to the respective taxing authorities. Purchases and sales of inventory with the same counterparty that are entered into in contemplation of one another are considered to be a single nonmonetary transaction. As such, the company records the net effect of such transactions in the consolidated results of operations within sales.
Vendor Consideration	Vendor Consideration Sysco recognizes consideration received from vendors as a reduction to cost of sales when the services performed in connection with the monies received are completed and when the related product has been sold by Sysco. There are several types of cash consideration received from vendors. In many instances, the vendor consideration is in the form of a specified amount per case or per pound. In these instances, Sysco will recognize the vendor consideration as a reduction of cost of sales when the product is sold. In the situations in which the vendor consideration is not related directly to specific product purchases, Sysco will recognize these as a reduction of cost of sales when the earnings process is complete, the related service is performed and the amounts are realized.
Shipping and Handling Costs	Shipping and Handling Costs Shipping and handling costs include costs associated with the selection of products and delivery to customers.
Insurance Program	Insurance Program Sysco maintains a self-insurance program covering portions of workers’ compensation, general and vehicle liability and property insurance costs. The amounts in excess of the self-insured levels are fully insured by third party insurers. In fiscal 2018, Sysco created a wholly owned captive insurance subsidiary (the Captive) with the primary purpose to enhance Sysco’s risk financing strategies by providing Sysco the opportunity to negotiate insurance premiums in the non-retail insurance market. The Captive must maintain a sufficient level of cash to fund future reserve payments and secure the insurer’s obligations for workers’ compensation, general liability and auto liability programs. The Captive holds restricted cash and restricted cash equivalents in a cash deposit account in order to meet solvency requirements. Further, Sysco has letters of credit available to collateralize the remaining liabilities not covered by restricted cash and restricted cash equivalents. The company also maintains a fully self-insured group medical program. Liabilities associated with these risks are estimated in part by considering historical claims experience, medical cost trends, demographic factors, severity factors and other actuarial assumptions.
Share-Based Compensation	Share-Based Compensation Sysco recognizes expense for its share-based compensation based on the fair value of the awards that are granted. The fair value of performance share unit awards is determined based on the target number of shares of common stock and the company’s stock price on the date of grant and subsequently adjusted based on actual and forecasted performance compared to planned targets. The fair value of stock options is estimated at the date of grant using the Black-Scholes option pricing model. Option pricing methods require the input of highly subjective assumptions, including the expected stock price volatility. The fair value of restricted stock and restricted stock unit awards are based on the company’s stock price on the date of grant. Measured compensation cost is recognized ratably over the vesting period of the related share-based compensation award. The method for estimating the fair value of stock options has not changed in the past 3 years.
Income Taxes	Income Taxes Sysco recognizes deferred tax assets and liabilities based on the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured pursuant to tax laws using rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The impact on deferred tax assets and liabilities of a change in tax rate is recognized in income in the period that includes the enactment date. Valuation allowances are established when necessary to reduce deferred tax assets to the amount more likely than not to be realized. The determination of the company’s provision for income taxes requires significant judgment, the use of estimates and the interpretation and application of complex tax laws. The company’s provision for income taxes primarily reflects a combination of income earned and taxed in the various United States (U.S.) federal and state, as well as various foreign jurisdictions. Jurisdictional tax law changes, increases or decreases in permanent differences between book and tax items, accruals or adjustments of accruals for tax contingencies or valuation allowances, and the company’s change in the mix of earnings from these taxing jurisdictions all affect the overall effective tax rate.
Acquisitions	Acquisitions Acquisitions of businesses are accounted for using the acquisition method of accounting, and the financial statements include the results of the acquired operations from the respective dates of acquisition. The purchase price of the acquired entities is preliminarily allocated to the net assets acquired and liabilities assumed based on the estimated fair value at the dates of acquisition, with any excess of cost over the fair value of net assets acquired, including intangibles, recognized as goodwill. Subsequent changes to preliminary amounts are made prospectively.
Basis of Presentation	Basis of Presentation The financial statements include consolidated balance sheets, consolidated results of operations, consolidated statements of comprehensive income, changes in consolidated shareholders’ equity and consolidated cash flows. In the opinion of management, all adjustments, which consist of normal recurring adjustments, except as otherwise disclosed, necessary to present fairly the financial position, results of operations, comprehensive income and cash flows for all periods presented have been made. Sysco has interests in various jointly owned foodservice operations in Mexico, Panama and Sweden for which it consolidates the results of the operations; therefore, the financial position, results of operations and cash flows for these companies have been included in Sysco’s consolidated financial statements. The value of the noncontrolling interest in each entity is considered redeemable due to certain features of the investment agreement and has, therefore, been presented as mezzanine equity, which is outside of permanent equity, in the consolidated balance sheets. The income attributable to the noncontrolling interest is located within Other expense (income), net, in the consolidated results of operations, as this amount is not material. The non-cash add back for the change in the value of the noncontrolling interest is located within Other non-cash items on the consolidated cash flows.
Reclassifications	Reclassifications Prior year amounts have been reclassified to conform with the current year presentation.
New Accounting Pronouncements	Stock Compensation In March 2016, the Financial Accounting Standards Board (FASB) issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting (Topic 718). The ASU identifies areas for simplification involving several aspects of accounting for share-based payment transactions, including the income tax consequences, classification of awards as equity or liabilities, an option to recognize gross stock compensation expense with actual forfeitures recognized as they occur, as well as certain classifications on the statement of cash flows. The company adopted this ASU in the first quarter of fiscal 2018. The company elected to maintain the current policy to estimate forfeitures expected to occur to determine stock-based compensation expense. Further, the company adopted the provisions that have changed its accounting for excess tax benefits or detriments. Excess tax benefits or detriments were previously included within additional paid-in capital in the consolidated balance sheet and were a part of the diluted share calculation. On a prospective basis, excess tax benefits or detriments are included within income tax expense in the consolidated results of operations and are no longer a part of the diluted share calculation. Prior periods have not been adjusted. In fiscal 2018, the company recognized excess tax benefits of $52.1 million from stock option exercises and restricted stock unit vestings that occurred during the period. The standard also requires several presentation changes with regard to the statement of cash flows, which the company adopted on a retrospective basis; therefore, amounts presented for fiscal 2017 and 2016 in the statement of cash flows reflect the guidance required by this ASU. Cash flows related to excess tax benefits or detriments are included in net cash provided by operating activities, rather than as a financing activity. The standard further requires that cash paid by an employer, when directly withholding shares for tax withholding purposes, should be classified as a financing activity and applied retrospectively. Cash payments to tax authorities in connection with shares withheld to meet statutory income tax withholding requirements are presented as a financing activity in the consolidated statement of cash flows. Restricted Cash In August 2016, the FASB issued ASU 2016-18, Statement of Cash Flows: Restricted Cash (Topic 230). The ASU clarifies the presentation of restricted cash on the statement of cash flows. Amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling between the beginning and ending cash balances on the statement of cash flows. We retrospectively adopted the standard in the second quarter of fiscal 2018, which was one year earlier than required. The adoption increases the ending cash balance within our statement of cash flows by the aggregate amount of our restricted cash balances and requires a new disclosure to reconcile the cash balances within our statement of cash flows to the balance sheets for each period presented. See Supplemental Cash Flow Information within Note 1, “Summary of Accounting Policies.” For fiscal 2018, $163.5 million of restricted cash is included with cash, cash equivalents and restricted cash. There were no material restricted cash balances in fiscal 2017 and, therefore, there is no material impact to amounts reported for that period. Simplifying the Test for Goodwill Impairment In January 2017, the FASB issued ASU 2017-04, Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment, which simplifies the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test. The amendments also eliminate the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The company early adopted this ASU in the first quarter of fiscal 2018. Targeted Improvements to Accounting for Hedging Activities In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging, which expands and refines hedge accounting for both financial and non-financial risk components, aligns the recognition and presentation of the effects of hedging instruments and hedge items in the financial statements, and includes certain targeted improvements to ease the application of current guidance related to the assessment of hedge effectiveness. Sysco has early adopted the standard using the modified retrospective approach to existing hedging relationships as of the second quarter of fiscal 2018, rather than in fiscal 2020, as required by the ASU. Sysco believes that the early adoption of the hedging standard provides a better alignment between risk management activities and hedge accounting, and reduce total cost of ownership of the risk management program. All transition requirements have been applied to hedging relationships existing on the date of adoption and the effect of the adoption is reflected as of the beginning of fiscal 2018. The cumulative effect of the accounting change on the opening balance of retained earnings was immaterial to Sysco’s consolidated balance sheet. All required disclosures under ASU 2017-12 have been made in Note 9, “Derivative Financial Instruments.” Reporting Comprehensive Income In February 2018, the FASB issued ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220), to allow a reclassification from AOCI to retained earnings for stranded tax effects resulting from the Tax Act. The amendments in this update eliminate the stranded tax effects resulting from the Tax Act; however, the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected. The guidance is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years, which is fiscal 2020 for Sysco, with early adoption permitted. The company early adopted this ASU in the fourth quarter of fiscal 2018, resulting in $236.4 million of accumulated other comprehensive loss being reclassified into retained earnings. Revenue from Contracts with Customers In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), and has issued subsequent amendments to this guidance. This new standard will replace all current guidance on this topic and eliminate all industry-specific guidance. The new revenue recognition standard provides a unified model to determine when and how revenue is recognized. The core principle is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. The guidance is effective for interim and annual periods within new fiscal years beginning after December 15, 2017, which is fiscal 2019 for Sysco. The standard may be applied either retrospectively to each period presented or as a cumulative-effect adjustment as of the date of adoption. The company has substantially completed its assessment of the accounting required under Topic 606. Sysco does not expect that the implementation of the new standard will have a material effect on the company’s financial statements. The company will adopt the standard in the first quarter of fiscal 2019 using the modified retrospective method. Enhanced disclosures, including revenue recognition policies to identify performance obligations to customers and significant judgments in measurement and recognition, are required. Leases In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), specifying the accounting for leases, which supersedes the leases requirements in Topic 840, Leases. The objective of Topic 842 is to establish the principles that lessees and lessors shall apply to report useful information to users of financial statements about the amount, timing, and uncertainty of cash flows arising from a lease. Lessees are permitted to make an accounting policy election to not recognize the asset and liability for leases with a term of twelve months or less. Lessors’ accounting is largely unchanged from the previous accounting standard. In addition, Topic 842 expands the disclosure requirements of lease arrangements. Topic 842 currently requires lessees and lessors to use a modified retrospective transition approach, which includes a number of practical expedients. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, which is fiscal 2020 for Sysco, with early adoption permitted. In July 2018, the FASB issued ASU 2018-11, Leases (Topic 842): Targeted Improvements, to simplify the lease standard’s implementation. The amended guidance relieves businesses and other organizations of the requirement to present prior comparative years’ results when they adopt the new lease standard. Instead of recasting prior year results using the new accounting when they adopt the guidance, companies can choose to recognize the cumulative effect of applying the new standard to leased assets and liabilities as an adjustment to the opening balance of retained earnings. The company is currently reviewing the provisions of the new leases standards. Financial Instruments - Credit Losses In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which introduces a forward-looking approach, based on expected losses, to estimate credit losses on certain types of financial instruments, including trade receivables. The estimate of expected credit losses will require entities to incorporate considerations of historical information, current information and reasonable and supportable forecasts. This ASU also expands the disclosure requirements to enable users of financial statements to understand the entity’s assumptions, models and methods for estimating expected credit losses. This guidance is effective for fiscal years-and interim periods within those fiscal years-beginning after December 15, 2019, which is the first quarter of fiscal 2021 for Sysco, with early adoption permitted. The company is currently reviewing the provisions of the new standard. Guidance in Presentation of Cash Flows - Classification of Certain Cash Receipts and Cash Payments In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, to address eight specific cash flow issues with the objective of reducing the existing diversity in practice. The eight specific issues are: (1) Debt Prepayment or Debt Extinguishment Costs; (2) Settlement of Zero-Coupon Debt Instruments or Other Debt Instruments with Coupon Interest Rates That Are Insignificant in Relation to the Effective Interest Rate of the Borrowing; (3) Contingent Consideration Payments Made after a Businesses Combination; (4) Proceeds from the Settlement of Insurance Claims; (5) Proceeds from the Settlement of Corporate-Owned Life Insurance Policies, including Bank-Owned Life Insurance Policies; (6) Distributions Received from Equity Method Invitees; (7) Beneficial Interests in Securitization Transactions; and (8) Separately Identifiable Cash and Application of the Predominance Principle. The guidance is effective for annual periods beginning after December 15, 2017 and interim periods within those annual periods, which is the first quarter of fiscal 2019 for Sysco. The company has completed its assessment of the accounting required under ASU 2016-15 and does not expect that the implementation of the new standard will have a material effect on the company’s cash flow statement. Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost In March 2017, the FASB issued ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, requiring that an employer report the service cost component of pension and postretirement benefits in the same line item or items as other compensation costs. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside of a subtotal of income from operations. In addition, only the service cost component will be eligible for capitalization as applicable. The guidance is effective for annual periods beginning after December 15, 2017 and interim periods within those annual periods, which is the first quarter of fiscal 2019 for Sysco, and will be applied retroactively. The company has substantially completed its assessment of the accounting required under ASU 2017-07, concluding it will result in net periodic income of $15.0 million for fiscal 2018 and net periodic cost of $1.3 million for fiscal 2017 being recorded in other expense (income) that was previously included in operating expense.