Goodwill and intangible assets Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 27, 2020	Oct. 02, 2021	Jul. 03, 2021
Finite-Lived Intangible Assets [Line Items]
Acquired amount		$ 431,150	$ 439,409
Accumulated Amortization		(408,076)	(410,870)
Net Book Value		23,074	28,539
Intangible asset impairment	$ 17,473
Customer related
Finite-Lived Intangible Assets [Line Items]
Acquired amount		318,429	324,416
Accumulated Amortization		(307,121)	(312,392)
Net Book Value		11,308	12,024
Trade name
Finite-Lived Intangible Assets [Line Items]
Acquired amount		56,024	57,184
Accumulated Amortization		(46,340)	(45,019)
Net Book Value		9,684	12,165
Technology and other
Finite-Lived Intangible Assets [Line Items]
Acquired amount		56,697	57,809
Accumulated Amortization		(54,615)	(53,459)
Net Book Value		$ 2,082	$ 4,350