Acquisitions and divestitures (2014 Acquisitions) (Details) $ in Thousands	12 Months Ended
	Jun. 28, 2014 USD ($) item	Jun. 29, 2013 USD ($)	Jun. 27, 2015 USD ($)
Business Acquisition [Line Items]
Acquisitions of operations and investments, net of cash acquired	$ 116,882	$ 262,306
Contingent consideration
Contingent consideration			$ 31,500
Assets Acquired and Liabilities Assumed
Goodwill	1,348,468		1,278,756
Electronics Marketing
Assets Acquired and Liabilities Assumed
Goodwill	668,457		639,106
Technology Solutions
Assets Acquired and Liabilities Assumed
Goodwill	$ 680,011		$ 639,650
2014 Acquisitions
Business Acquisition [Line Items]
Number of businesses acquired | item	3
Business acquisition, aggregate annualized revenue of acquired businesses	$ 492,000
Acquisitions of operations and investments, net of cash acquired	116,900
Contingent consideration
Cash paid	181,645
Contingent consideration	38,081
Total consideration	219,726
Contingent consideration, maximum additional payment	50,000
Assets Acquired and Liabilities Assumed
Cash	64,763
Receivables	36,216
Inventories	95,202
Other current assets	6,597
Property, plant and equipment and other non-current assets	28,155
Intangible assets	53,502
Total identifiable assets acquired	284,435
Accounts payable, accrued liabilities and other current liabilities	(66,848)
Short-term debt	(45,942)
Other long-term liabilities	(14,535)
Total identifiable liabilities assumed	(127,325)
Net identifiable assets acquired	157,110
Goodwill	62,616
Net assets acquired	219,726
2014 Acquisitions | Electronics Marketing
Assets Acquired and Liabilities Assumed
Goodwill	52,000
2014 Acquisitions | Technology Solutions
Assets Acquired and Liabilities Assumed
Goodwill	$ 10,600