Segment information - Textuals (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 29, 2013
Segment Reporting Information [Line Items]
Sales	$ 27,924,657	$ 27,499,654	$ 25,458,924
Property, plant and equipment, net	568,779	534,999	492,600
United States
Segment Reporting Information [Line Items]
Sales	9,960,000	9,680,000	9,430,000
Property, plant and equipment, net	352,200	298,100	273,400
Germany
Segment Reporting Information [Line Items]
Sales	2,930,000	3,310,000	2,780,000
Property, plant and equipment, net	74,200	95,500	92,700
Belgium
Segment Reporting Information [Line Items]
Property, plant and equipment, net	74,700	61,000	45,100
United Kingdom
Segment Reporting Information [Line Items]
Sales	1,460,000	1,360,000	1,220,000
Taiwan
Segment Reporting Information [Line Items]
Sales	3,420,000	2,630,000	2,280,000
China (including Hong Kong)
Segment Reporting Information [Line Items]
Sales	2,840,000	2,930,000	2,440,000
SINGAPORE
Segment Reporting Information [Line Items]
Sales	1,180,000	1,190,000	1,160,000
Semiconductors
Segment Reporting Information [Line Items]
Sales	15,715,800	14,558,400	13,720,800
Computer Products
Segment Reporting Information [Line Items]
Sales	9,614,200	10,571,600	9,346,000
Connectors, passives, electromechanical and other
Segment Reporting Information [Line Items]
Sales	$ 2,594,700	$ 2,369,700	$ 2,392,100