Income taxes - Textuals (Details) - USD ($)	12 Months Ended
	Jul. 02, 2016	Jun. 27, 2015	Jun. 28, 2014
Income Tax [Line Items]
Income (loss) before income taxes, Domestic	$ 115,200,000	$ 180,600,000	$ 235,400,000
Income (loss) before income taxes, Foreign	$ 555,300,000	$ 532,300,000	$ 465,700,000
Effective tax rate	24.50%	19.80%	22.20%
Net tax benefit impacting tax rate	$ 15,100,000
Tax benefit release of valuation allowance against deferred tax assets	9,200,000
Foreign income tax expense (benefit)	9,500,000
Reduction in deferred tax valuation allowance	7,900,000	$ 60,800,000	$ 39,600,000
Valuation allowance impacted effective tax rate	4,100,000	9,200,000	6,000,000
Increase in valuation allowance for newly acquired companies and companies with a history of losses	3,400,000
Net operating loss carry forward	604,200,000
Operating loss carry forward, subject to expiration	146,300,000
Deferred tax assets operating loss carry forwards expiring in next three years and after	75,700,000
Operating loss carry forward, not subject to expiration	382,200,000
Unrecognized tax benefits	101,440,000	103,923,000	$ 128,221,000
Recognized tax benefits	70,200,000	69,000,000
Accrued interest expense and penalties	17,800,000	$ 22,600,000
Tax contingencies settled	12,400,000
Expected cash payment for settlement	4,700,000
Provision for income taxes on unremitted earnings of foreign subsidiaries	0
Cumulative unremitted earnings of foreign subsidiaries	3,180,000,000
Fiscal Year 2016 Restructuring Liabilities | EMEA | Other Noncurrent Assets
Income Tax [Line Items]
Deferred tax assets	$ 105,700,000