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Goodwill and long-lived assets Textuals (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 29, 2019
Jun. 30, 2018
Jul. 01, 2017
Goodwill and long-lived assets      
Goodwill impairment expense $ 137,396 $ 181,440  
Weighted average life of intangible assets 2 years    
Intangible asset amortization expense $ 83,682 $ 91,475 $ 53,953