Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Investments and Fair Value Measurements (Details 3) - USD ($) $ in Millions	12 Months Ended
	Jun. 27, 2015	Jun. 28, 2014
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	$ 496.4
Money market funds	220.6
Trading securities	3.4
Total assets	720.4
Recurring basis \| Cash and cash equivalents
Fair Value Measurements
Total assets	225.4
Recurring basis \| Short-term investment
Fair Value Measurements
Total assets	465.3
Recurring basis \| Restricted cash
Fair Value Measurements
Total assets	25.1
Recurring basis \| Other non-current assets
Fair Value Measurements
Total assets	4.6
Recurring basis \| U.S. treasuries \| Total fair value
Fair Value Measurements
Total debt available-for-sale securities	51.9
Recurring basis \| U.S. Agencies \| Total fair value
Fair Value Measurements
Total debt available-for-sale securities	96.0
Recurring basis \| Municipal bonds and sovereign debt instruments \| Total fair value
Fair Value Measurements
Total debt available-for-sale securities	4.0
Recurring basis \| Asset-backed securities \| Total fair value
Fair Value Measurements
Total debt available-for-sale securities	70.4
Recurring basis \| Corporate securities \| Total fair value
Fair Value Measurements
Total debt available-for-sale securities	274.1
Recurring basis \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Measurements
Total debt available-for-sale securities	51.9
Money market funds	220.6
Trading securities	3.4
Total assets	275.9
Recurring basis \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| U.S. treasuries
Fair Value Measurements
Total debt available-for-sale securities	51.9
Recurring basis \| Significant Other Observable Inputs (Level 2)
Fair Value Measurements
Total debt available-for-sale securities	444.5
Total assets	444.5
Recurring basis \| Significant Other Observable Inputs (Level 2) \| U.S. Agencies
Fair Value Measurements
Total debt available-for-sale securities	96.0
Recurring basis \| Significant Other Observable Inputs (Level 2) \| Municipal bonds and sovereign debt instruments
Fair Value Measurements
Total debt available-for-sale securities	4.0
Recurring basis \| Significant Other Observable Inputs (Level 2) \| Asset-backed securities
Fair Value Measurements
Total debt available-for-sale securities	70.4
Recurring basis \| Significant Other Observable Inputs (Level 2) \| Corporate securities
Fair Value Measurements
Total debt available-for-sale securities	$ 274.1