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Goodwill and long-lived assets (Details) - USD ($)	3 Months Ended	9 Months Ended
Goodwill and long-lived assets (Details) - USD ($)	Mar. 31, 2018	Mar. 31, 2018	Jun. 30, 2018	Jul. 04, 2009
Carrying amount of goodwill, by reportable segment
Carrying value		$ 1,148,347,000
Additions from acquisitions		19,725,000
Impairment of goodwill	$ (181,440,000)	(181,440,000)
Foreign currency translation		52,708,000
Measurement period adjustments		(12,798,000)
Carrying value	1,026,542,000	1,026,542,000
Accumulated Impairment			$ 181,440	$ 1,045,110
Electronic Components
Carrying amount of goodwill, by reportable segment
Carrying value		635,048,000
Additions from acquisitions		19,725,000
Impairment of goodwill		(181,440,000)
Foreign currency translation		12,532,000
Measurement period adjustments		2,530,000
Carrying value	488,395,000	488,395,000
Premier Farnell
Carrying amount of goodwill, by reportable segment
Carrying value		513,299,000
Foreign currency translation		40,176,000
Measurement period adjustments		(15,328,000)
Carrying value	$ 538,147,000	$ 538,147,000