Goodwill and intangible assets Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 27, 2020	Jan. 01, 2022	Jul. 03, 2021
Finite-Lived Intangible Assets [Line Items]
Acquired amount		$ 431,336	$ 439,409
Accumulated Amortization		(412,065)	(410,870)
Net Book Value		19,271	28,539
Intangible asset impairment	$ 17,473
Customer Related [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired amount		318,723	324,416
Accumulated Amortization		(308,131)	(312,392)
Net Book Value		10,592	12,024
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired amount		56,103	57,184
Accumulated Amortization		(48,635)	(45,019)
Net Book Value		7,468	12,165
Technology and other
Finite-Lived Intangible Assets [Line Items]
Acquired amount		56,510	57,809
Accumulated Amortization		(55,299)	(53,459)
Net Book Value		$ 1,211	$ 4,350