Acquisitions and divestitures (2013 Acquisitions) (Details) (USD $)	12 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 30, 2012
Contingent consideration
Acquisitions of operations and investments, net of cash acquired	$ 116,882,000	$ 262,306,000	$ 313,218,000
Assets Acquired and Liabilities Assumed
Goodwill	1,348,468,000	1,261,288,000
Pro Forma Results For Years Ended
Gain on bargain purchase			(900,000)
Gain on bargain purchase per share on a diluted basis			$ 0.01
Electronics Marketing [Member]
Assets Acquired and Liabilities Assumed
Goodwill	668,457,000	601,830,000
Technology Solutions [Member]
Assets Acquired and Liabilities Assumed
Goodwill	680,011,000	659,458,000
2013 Acquisitions [Member]
Business Acquisition [Line Items]
Number of businesses acquired		12
Business acquisition revenue		1,180,000,000
Contingent consideration
Cash paid		297,484,000
Contingent consideration		11,467,000
Total consideration	308,951,000	308,951,000
Contingent consideration, maximum additional payment		22,200,000
Acquisitions of operations and investments, net of cash acquired		262,300,000
Assets Acquired and Liabilities Assumed
Cash		29,276,000
Receivables		226,743,000
Inventories		91,791,000
Other current assets		33,689,000
Property, plant and equipment		25,311,000
Other assets		47,292,000
Total identifiable assets acquired		454,102,000
Accounts payable, accrued liabilities and other current liabilities		(157,986,000)
Long-term debt		(66,367,000)
Total identifiable liabilities assumed		(45,640,000)
Total identifiable liabilities assumed		269,993,000
Net identifiable assets acquired		184,109,000
Goodwill		157,521,000
Bargain purchase recognized		(32,679,000)
Net assets acquired	308,951,000	308,951,000
Intangible assets		35,200,000
Pro Forma Results For Years Ended
Sales		25,771,000,000	26,872,000,000
Net income		454,000,000	587,000,000
2013 Acquisitions [Member] | Electronics Marketing [Member]
Assets Acquired and Liabilities Assumed
Goodwill		62,000,000
2013 Acquisitions [Member] | Technology Solutions [Member]
Assets Acquired and Liabilities Assumed
Goodwill		95,500,000
Internix, Inc [Member]
Pro Forma Results For Years Ended
Gain on bargain purchase		$ 32,700,000
Gain on bargain purchase per share on a diluted basis		$ 0.23