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Investments and Fair Value Measurements (Details 3) - USD ($) $ in Millions	9 Months Ended
	Apr. 02, 2016	Mar. 28, 2015
Maximum
Foreign Currency Forward Contracts
Foreign currency forward contracts, expiration period	120 days	120 days
Recurring basis \| Total fair value
Fair Value Measurements
Total debt available-for-sale securities	$ 344.4
Marketable equity securities	244.3
Money market funds	273.7
Trading securities	2.4
Total assets	864.8
Recurring basis \| Cash and cash equivalents
Fair Value Measurements
Total assets	293.5
Recurring basis \| Short-term investments
Fair Value Measurements
Total assets	555.8
Recurring basis \| Restricted cash
Fair Value Measurements
Total assets	11.1
Recurring basis \| Other non-current assets
Fair Value Measurements
Total assets	4.4
Recurring basis \| U.S. treasuries \| Total fair value
Fair Value Measurements
Total debt available-for-sale securities	60.2
Recurring basis \| U.S. agencies \| Total fair value
Fair Value Measurements
Total debt available-for-sale securities	29.1
Recurring basis \| Municipal bonds and sovereign debt instruments \| Total fair value
Fair Value Measurements
Total debt available-for-sale securities	2.3
Recurring basis \| Asset-backed securities \| Total fair value
Fair Value Measurements
Total debt available-for-sale securities	46.0
Recurring basis \| Corporate securities \| Total fair value
Fair Value Measurements
Total debt available-for-sale securities	206.8
Recurring basis \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Measurements
Total debt available-for-sale securities	60.2
Marketable equity securities	244.3
Money market funds	273.7
Trading securities	2.4
Total assets	580.6
Recurring basis \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| U.S. treasuries
Fair Value Measurements
Total debt available-for-sale securities	60.2
Recurring basis \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| U.S. agencies
Fair Value Measurements
Total debt available-for-sale securities	0.0
Recurring basis \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Municipal bonds and sovereign debt instruments
Fair Value Measurements
Total debt available-for-sale securities	0.0
Recurring basis \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Asset-backed securities
Fair Value Measurements
Total debt available-for-sale securities	0.0
Recurring basis \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Corporate securities
Fair Value Measurements
Total debt available-for-sale securities	0.0
Recurring basis \| Significant Other Observable Inputs (Level 2)
Fair Value Measurements
Total debt available-for-sale securities	284.2
Marketable equity securities	0.0
Money market funds	0.0
Trading securities	0.0
Total assets	284.2
Recurring basis \| Significant Other Observable Inputs (Level 2) \| U.S. treasuries
Fair Value Measurements
Total debt available-for-sale securities	0.0
Recurring basis \| Significant Other Observable Inputs (Level 2) \| U.S. agencies
Fair Value Measurements
Total debt available-for-sale securities	29.1
Recurring basis \| Significant Other Observable Inputs (Level 2) \| Municipal bonds and sovereign debt instruments
Fair Value Measurements
Total debt available-for-sale securities	2.3
Recurring basis \| Significant Other Observable Inputs (Level 2) \| Asset-backed securities
Fair Value Measurements
Total debt available-for-sale securities	46.0
Recurring basis \| Significant Other Observable Inputs (Level 2) \| Corporate securities
Fair Value Measurements
Total debt available-for-sale securities	$ 206.8