Fair Value Measurements (Fair Value Measurements of Assets and Liabilities) (Details) - USD ($) $ in Millions | Sep. 26, 2015 | Jun. 27, 2015 |
Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | $ 266.9 | $ 485 |
Contingent earnout obligation | 0 | 0 |
Level 1 | Commercial Paper | Short-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 0 | 0 |
Level 1 | Government Securities | Short-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 62.1 | 42.8 |
Level 1 | Government Securities | Long-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 9.3 | 9.3 |
Level 1 | Corporate debt securities - U.S. | Short-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 0 | 0 |
Level 1 | Corporate debt securities - U.S. | Long-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 0 | 0 |
Level 1 | Corporate debt securities - non-U.S. | Short-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 0 | 0 |
Level 1 | Corporate debt securities - non-U.S. | Long-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 0 | 0 |
Level 1 | Inventory-related instruments | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 0 | 0 |
Derivative liabilities | 0 | 0 |
Level 1 | Intercompany loan hedges | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 0 | 0 |
Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 2 | 14.7 |
Contingent earnout obligation | 0 | 0 |
Level 2 | Commercial Paper | Short-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 23.4 | 0 |
Level 2 | Government Securities | Short-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 1.7 | 0 |
Level 2 | Government Securities | Long-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 0 | 0 |
Level 2 | Corporate debt securities - U.S. | Short-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 123.1 | 110 |
Level 2 | Corporate debt securities - U.S. | Long-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 56.4 | 42.6 |
Level 2 | Corporate debt securities - non-U.S. | Short-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 99.5 | 74.6 |
Level 2 | Corporate debt securities - non-U.S. | Long-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 43.1 | 33.9 |
Level 2 | Inventory-related instruments | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 0.9 | 3.3 |
Derivative liabilities | 0.6 | 0.2 |
Level 2 | Intercompany loan hedges | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 0.1 | 0.1 |
Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | 0 |
Contingent earnout obligation | 21.6 | 19.4 |
Level 3 | Commercial Paper | Short-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 0 | |
Level 3 | Government Securities | Short-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 0 | 0 |
Level 3 | Government Securities | Long-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 0 | 0 |
Level 3 | Corporate debt securities - U.S. | Short-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 0 | 0 |
Level 3 | Corporate debt securities - U.S. | Long-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 0 | 0 |
Level 3 | Corporate debt securities - non-U.S. | Short-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 0 | 0 |
Level 3 | Corporate debt securities - non-U.S. | Long-term investments: | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Investments | 0 | 0 |
Level 3 | Inventory-related instruments | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 0 | 0 |
Derivative liabilities | 0 | 0 |
Level 3 | Intercompany loan hedges | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | $ 0 | $ 0 |