FAIR VALUE MEASUREMENTS (Other Financial Instruments) (Details) - USD ($) $ in Millions	Jun. 24, 2020	Jun. 26, 2019	Dec. 27, 2017
Debt Instrument [Line Items]
Note receivable from sale of Mexico JV, gross			$ 18.0
Note receivable from sale of Mexico JV, fair value	$ 7.3		$ 16.0
3.875% notes
Debt Instrument [Line Items]
Stated interest rate	3.875%
Long-term debt	$ 299.0	$ 298.6
Long-term debt, fair value	$ 282.8	296.3
5.000% notes
Debt Instrument [Line Items]
Stated interest rate	5.00%
Long-term debt	$ 346.7	345.9
Long-term debt, fair value	$ 330.8	$ 356.2

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

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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.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Amount, before allowance for credit loss, of financing receivable, classified as noncurrent.

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Fair value portion of an agreement for an unconditional promise by the maker to pay the holder a definite sum of money at a future date.

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