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Goodwill and intangible assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 28, 2020	Jun. 27, 2020	Jun. 29, 2019	Jun. 30, 2018	Jul. 04, 2009
Carrying amount of goodwill, by reportable segment
Carrying value		$ 876,728
Additions from acquisitions		28,819
Impairment of goodwill		(118,731)
Foreign currency translation		(13,082)
Carrying value		773,734
Accumulated Impairment		118,731	$ 137,396	$ 181,440	$ 1,045,110
Electronic Components
Carrying amount of goodwill, by reportable segment
Carrying value		390,896
Additions from acquisitions		28,819
Impairment of goodwill	$ (120,500)	(118,731)
Foreign currency translation		(3,148)
Carrying value		297,836
Farnell
Carrying amount of goodwill, by reportable segment
Carrying value		485,832
Additions from acquisitions
Foreign currency translation		(9,934)
Carrying value		$ 475,898