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COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - INVESTMENTS STRATEGY (Details) - Pension Benefits
12 Months Ended
Jun. 29, 2019
Jun. 26, 2021
Jun. 27, 2020
United States      
Defined Benefit Plan Disclosure [Line Items]      
Actual Asset Allocation     100.00%
United Kingdom      
Defined Benefit Plan Disclosure [Line Items]      
Target Asset Allocation     2.30%
Actual Asset Allocation     100.00%
Maximum allowable portfolio annual risk 10.00%    
United Kingdom | Forecast      
Defined Benefit Plan Disclosure [Line Items]      
Target Asset Allocation   2.10%  
Growth assets | United States      
Defined Benefit Plan Disclosure [Line Items]      
Target Asset Allocation     30.00%
Actual Asset Allocation     28.00%
Liability hedging assets | United States      
Defined Benefit Plan Disclosure [Line Items]      
Target Asset Allocation     70.00%
Actual Asset Allocation     72.00%
Liability hedging assets | United Kingdom      
Defined Benefit Plan Disclosure [Line Items]      
Target Asset Allocation     40.00%
Actual Asset Allocation     48.00%
Common contractual fund | United Kingdom      
Defined Benefit Plan Disclosure [Line Items]      
Target Asset Allocation     60.00%
Actual Asset Allocation     52.00%