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INCOME TAXES - Reconciliation of Income Tax Rates (Details)	6 Months Ended	12 Months Ended
	Jan. 03, 2020	Jan. 01, 2021	Jun. 28, 2019	Jun. 29, 2018
Income Tax Disclosure [Abstract]
U.S. statutory income tax rate	21.00%	21.00%	21.00%	28.10%
State taxes	1.40%	3.20%	2.40%	1.90%
International income	0.90%	0.40%	(0.50%)	(0.50%)
Non-deductible goodwill impairment	0.00%	5.80%	0.00%	0.00%
Research and development tax credit	(4.70%)	(9.20%)	(4.50%)	(2.90%)
Foreign derived intangibles income deduction	(0.80%)	(1.30%)	(1.30%)	0.00%
Change in valuation allowance	(4.80%)	0.50%	(1.80%)	0.20%
U.S. production activity benefit	0.00%	0.00%	0.00%	(0.90%)
Equity-based compensation	(5.40%)	(1.00%)	(2.10%)	(1.80%)
Settlement of tax audits	0.00%	(1.80%)	0.00%	(2.20%)
U.S. tax reform	0.00%	0.00%	0.00%	0.40%
Other items	0.40%	0.10%	1.20%	0.40%
Effective income tax rate	8.00%	17.70%	14.40%	22.70%

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Effective Income Tax Rate Reconciliation, Deduction, Foreign Derived Intangibles Income, Percent

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