FAIR VALUE MEASUREMENTS (Schedule of Carrying and Fair Values of Financial Instruments) (Details) - USD ($) $ in Millions	Sep. 23, 2020	Jun. 24, 2020	Dec. 27, 2017
Fair Value Disclosure, Senior Notes [Line Items]
Sales price of JV received as note receivable			$ 18.0
Fair value of note receivable	$ 7.0		$ 16.0
3.875% notes [Member]
Fair Value Disclosure, Senior Notes [Line Items]
Notes, stated percentage interest rate	3.875%
Carrying value of notes	$ 299.1	$ 299.0
Fair value of notes	$ 293.3	282.8
5.000% notes [Member]
Fair Value Disclosure, Senior Notes [Line Items]
Notes, stated percentage interest rate	5.00%
Carrying value of notes	$ 346.9	346.7
Fair value of notes	$ 357.4	$ 330.8

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

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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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