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Goodwill and intangible assets (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 28, 2020	Mar. 28, 2020	Jun. 29, 2019	Jun. 30, 2018	Jul. 04, 2009
Carrying amount of goodwill, by reportable segment
Carrying value		$ 876,728
Additions from acquisitions		30,562
Impairment of goodwill	$ (120,500)	(120,475)
Foreign currency translation		(25,876)
Carrying value	760,939	760,939
Accumulated Impairment			$ 137,396	$ 181,440	$ 1,045,110
Electronic Components
Carrying amount of goodwill, by reportable segment
Carrying value		390,896
Additions from acquisitions		30,562
Impairment of goodwill		(120,475)
Foreign currency translation		(5,970)
Carrying value	295,013	295,013
Farnell
Carrying amount of goodwill, by reportable segment
Carrying value		485,832
Additions from acquisitions		0
Foreign currency translation		(19,906)
Carrying value	$ 465,926	$ 465,926