Segment information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jul. 01, 2017
Sales, by segment
Sales	$ 19,518,592	$ 19,036,892	$ 17,439,963
Operating income (expense):
Operating income (expense) before restructuring charges, integration, amortization of acquired intangible assets, and other	774,200	739,200	760,800
Restructuring, integration and other expenses	(108,144)	(145,125)	(137,415)
Impairment of goodwill	(137,396)	(181,440)
Amortization of acquired intangible assets and other	(84,300)	(91,900)	(54,500)
Operating income (loss)	365,911	209,218	443,697
Assets:
Assets	8,564,556	9,596,845	9,699,600
Capital expenditures:
Purchases of property, plant and equipment	122,690	155,873	120,397
Depreciation & amortization expense:
Depreciation and amortization expense	180,800	234,900	155,400
Corporate
Operating income (expense):
Corporate Overhead Expenses	(78,500)	(111,500)	(125,200)
Assets:
Assets	189,300	488,000	1,084,000
Capital expenditures:
Purchases of property, plant and equipment	8,600	9,300	23,100
Depreciation & amortization expense:
Depreciation and amortization expense	5,700	7,100	37,300
Electronic Components
Sales, by segment
Sales	18,060,300	17,543,600	16,474,100
Capital expenditures:
Purchases of property, plant and equipment	80,100	127,500	81,600
Depreciation & amortization expense:
Depreciation and amortization expense	86,600	133,300	64,400
Electronic Components | Segment
Operating income (expense):
Operating income (expense) before restructuring charges, integration, amortization of acquired intangible assets, and other	614,900	587,300	661,000
Assets:
Assets	6,795,000	7,510,100	7,126,000
Farnell
Sales, by segment
Sales	1,458,300	1,493,300	965,900
Capital expenditures:
Purchases of property, plant and equipment	34,000	19,100	15,700
Depreciation & amortization expense:
Depreciation and amortization expense	88,500	94,500	53,700
Farnell | Segment
Operating income (expense):
Operating income (expense) before restructuring charges, integration, amortization of acquired intangible assets, and other	159,300	151,900	99,800
Assets:
Assets	$ 1,580,300	$ 1,598,700	$ 1,489,600