Goodwill and long-lived assets (Details) - USD ($) $ in Thousands	12 Months Ended
Jul. 01, 2017	Jul. 02, 2016
Carrying amount of goodwill, by reportable segment
Carrying value	$ 621,852
Acquisitions	488,680
Foreign currency translation	37,815
Carrying value	1,148,347
Gross Goodwill	2,193,457	$ 1,666,962
Accumulated Impairment	(1,045,110)	(1,045,110)
Electronic Components
Carrying amount of goodwill, by reportable segment
Carrying value	621,852
Acquisitions	12,818
Foreign currency translation	378
Carrying value	635,048
Gross Goodwill	1,680,158	1,666,962
Accumulated Impairment	(1,045,110)	$ (1,045,110)
Premier Farnell
Carrying amount of goodwill, by reportable segment
Acquisitions	475,862
Foreign currency translation	37,437
Carrying value	513,299
Gross Goodwill	$ 513,299

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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