Acquisitions and divestitures Unidux (Details) (USD $)	3 Months Ended			12 Months Ended
	Dec. 29, 2012	Sep. 29, 2012	Mar. 31, 2012	Jun. 29, 2013	Jun. 30, 2012	Jul. 02, 2011
Business Acquisition [Line Items]
Acquisitions of operations and investments, net of cash acquired				$ 262,306,000	$ 313,218,000	$ 690,997,000
Gain on bargain purchase	1,700,000	31,300,000	4,500,000		(854,000)	(3,857,000)
Business Acquisition Gain On Bargain Purchase Per Share On A Diluted Basis		$ 0.22	$ 0.03		$ 0.01	$ 0.02
Unidux Electronics Limited [Member]
Business Acquisition [Line Items]
Net assets acquired						163,770,000
Acquisitions of operations and investments, net of cash acquired						(132,780,000)
Gain on bargain purchase					$ 4,317,000	$ 30,990,000
Business Acquisition Gain On Bargain Purchase Per Share On A Diluted Basis					$ 0.03	$ 0.20