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Goodwill and long-lived assets (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018	Jun. 30, 2018	Jul. 04, 2009
Carrying amount of goodwill, by reportable segment
Carrying value		$ 980,872
Additions from acquisitions		49,405
Impairment of goodwill	$ (181,440)		$ (181,440)
Foreign currency translation		(2,845)
Carrying value		1,027,432
Accumulated Impairment				$ 181,440	$ 1,045,110
Electronic Components
Carrying amount of goodwill, by reportable segment
Carrying value		479,699
Additions from acquisitions		49,405
Foreign currency translation		(2,309)
Carrying value		526,795
Premier Farnell
Carrying amount of goodwill, by reportable segment
Carrying value		501,173
Foreign currency translation		(536)
Carrying value		$ 500,637