Goodwill and intangible assets Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Jun. 29, 2019
Finite-Lived Intangible Assets [Line Items]
Acquired amount	$ 431,285	$ 408,779
Accumulated Amortization	(312,099)	(265,259)
Net Book Value	119,186	143,520
Customer related
Finite-Lived Intangible Assets [Line Items]
Acquired amount	312,666	292,266
Accumulated Amortization	(244,418)	(208,329)
Net Book Value	68,248	83,937
Trade name
Finite-Lived Intangible Assets [Line Items]
Acquired amount	54,157	52,760
Accumulated Amortization	(29,713)	(24,752)
Net Book Value	24,444	28,008
Technology and other
Finite-Lived Intangible Assets [Line Items]
Acquired amount	64,462	63,753
Accumulated Amortization	(37,968)	(32,178)
Net Book Value	$ 26,494	$ 31,575