INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Dec. 26, 2020	Sep. 26, 2020	Dec. 28, 2019	Dec. 26, 2020	Dec. 28, 2019
Income Tax Disclosure [Abstract]
Effective income tax rate	17.05%		19.54%	16.38%	20.90%
Tax benefit attributable to the sale of stock		$ (7.6)
Impact of changes in tax law	$ 5.5			$ 5.5
Effective income tax expense (benefit) attributable to equity-based compensation	(4.3)		$ (11.8)	(6.6)	$ (27.5)
Unrecognized tax benefits	20.4			20.4
Liability recorded for interest and penalties related to unrecognized tax benefits	$ 2.4			$ 2.4

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

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Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

+ References

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-SubTopic 10
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Amount of income tax expense (benefit) from continuing operations attributable to an adjustment of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the disposition of a business not qualifying as a discontinued operation.

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Amount of unrecognized tax benefits.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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