Goodwill and intangible assets Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 28, 2019	Jun. 29, 2019
Finite-Lived Intangible Assets [Line Items]
Acquired amount	$ 398,571	$ 408,779
Accumulated Amortization	(278,432)	(265,259)
Net Book Value	120,139	143,520
Customer related
Finite-Lived Intangible Assets [Line Items]
Acquired amount	284,993	292,266
Accumulated Amortization	(218,402)	(208,329)
Net Book Value	66,591	83,937
Trade name
Finite-Lived Intangible Assets [Line Items]
Acquired amount	51,323	52,760
Accumulated Amortization	(26,107)	(24,752)
Net Book Value	25,216	28,008
Technology and other
Finite-Lived Intangible Assets [Line Items]
Acquired amount	62,255	63,753
Accumulated Amortization	(33,923)	(32,178)
Net Book Value	$ 28,332	$ 31,575