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v3.20.2

Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions | Sep. 27, 2020 | Sep. 29, 2019
--- | --- | ---
Assets [Abstract] |  |
Total short-term investments | $ 281.2 | $ 70.5
Total assets | 4,941.1 | 3,016.0
Liabilities [Abstract] |  |
Total liabilities | 86.6 | 18.2
Cash and cash equivalents [Member] |  |
Assets [Abstract] |  |
Cash and cash equivalents | 4,350.9 | 2,686.6
Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 216.3 | 4.0
Equity Securities, FV-NI | 64.9 | 66.5
Total short-term investments | 281.2 | 70.5
Prepaid Expenses and Other Current Assets [Member] |  |
Assets [Abstract] |  |
Derivative assets, Current | 15.6 | 12.6
Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 206.1 | 220.0
Other long-term assets [Member] |  |
Assets [Abstract] |  |
Derivative assets, Noncurrent | 87.3 | 26.3
Accrued liabilities [Member] |  |
Liabilities [Abstract] |  |
Derivative liabilities, Current | 7.3 | 5.7
Other long-term liabilities [Member] |  |
Liabilities [Abstract] |  |
Derivative liabilities, Noncurrent | 79.3 | 12.5
Commercial Paper [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 66.8 | 0.5
Corporate debt securities [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 123.6 | 3.5
Corporate debt securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 82.6 | 101.2
Auction rate securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 5.7 | 5.8
Foreign government obligations [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 8.5 |
U.S. Government Treasury Securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 94.9 | 106.5
State and local government obligations [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 3.6 | 4.9
Mortgage and other asset-backed securities [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 15.8 |
Mortgage and other asset-backed securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 19.3 | 1.6
Certificates of Deposit | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 1.6 |
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] |  |
Assets [Abstract] |  |
Total assets | 4,514.3 | 2,859.6
Liabilities [Abstract] |  |
Total liabilities | 2.0 | 1.1
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Cash and cash equivalents [Member] |  |
Assets [Abstract] |  |
Cash and cash equivalents | 4,350.9 | 2,686.6
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 0.0
Equity Securities, FV-NI | 64.9 | 66.5
Total short-term investments | 64.9 | 66.5
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Prepaid Expenses and Other Current Assets [Member] |  |
Assets [Abstract] |  |
Derivative assets, Current | 3.6 | 0.0
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 94.9 | 106.5
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Other long-term assets [Member] |  |
Assets [Abstract] |  |
Derivative assets, Noncurrent | 0.0 | 0.0
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Accrued liabilities [Member] |  |
Liabilities [Abstract] |  |
Derivative liabilities, Current | 1.9 | 1.1
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Other long-term liabilities [Member] |  |
Liabilities [Abstract] |  |
Derivative liabilities, Noncurrent | 0.1 | 0.0
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Commercial Paper [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 0.0
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Corporate debt securities [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 0.0
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Corporate debt securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 0.0
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Auction rate securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 0.0
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Foreign government obligations [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 |
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | U.S. Government Treasury Securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 94.9 | 106.5
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | State and local government obligations [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 0.0
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Mortgage and other asset-backed securities [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 |
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Mortgage and other asset-backed securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 0.0
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Certificates of Deposit | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 |
Significant Other Observable Inputs (Level 2) [Member] |  |
Assets [Abstract] |  |
Total assets | 421.1 | 150.6
Liabilities [Abstract] |  |
Total liabilities | 84.6 | 17.1
Significant Other Observable Inputs (Level 2) [Member] | Cash and cash equivalents [Member] |  |
Assets [Abstract] |  |
Cash and cash equivalents | 0.0 | 0.0
Significant Other Observable Inputs (Level 2) [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 216.3 | 4.0
Equity Securities, FV-NI | 0.0 | 0.0
Total short-term investments | 216.3 | 4.0
Significant Other Observable Inputs (Level 2) [Member] | Prepaid Expenses and Other Current Assets [Member] |  |
Assets [Abstract] |  |
Derivative assets, Current | 12.0 | 12.6
Significant Other Observable Inputs (Level 2) [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 105.5 | 107.7
Significant Other Observable Inputs (Level 2) [Member] | Other long-term assets [Member] |  |
Assets [Abstract] |  |
Derivative assets, Noncurrent | 87.3 | 26.3
Significant Other Observable Inputs (Level 2) [Member] | Accrued liabilities [Member] |  |
Liabilities [Abstract] |  |
Derivative liabilities, Current | 5.4 | 4.6
Significant Other Observable Inputs (Level 2) [Member] | Other long-term liabilities [Member] |  |
Liabilities [Abstract] |  |
Derivative liabilities, Noncurrent | 79.2 | 12.5
Significant Other Observable Inputs (Level 2) [Member] | Commercial Paper [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 66.8 | 0.5
Significant Other Observable Inputs (Level 2) [Member] | Corporate debt securities [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 123.6 | 3.5
Significant Other Observable Inputs (Level 2) [Member] | Corporate debt securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 82.6 | 101.2
Significant Other Observable Inputs (Level 2) [Member] | Auction rate securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 0.0
Significant Other Observable Inputs (Level 2) [Member] | Foreign government obligations [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 8.5 |
Significant Other Observable Inputs (Level 2) [Member] | U.S. Government Treasury Securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 0.0
Significant Other Observable Inputs (Level 2) [Member] | State and local government obligations [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 3.6 | 4.9
Significant Other Observable Inputs (Level 2) [Member] | Mortgage and other asset-backed securities [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 15.8 |
Significant Other Observable Inputs (Level 2) [Member] | Mortgage and other asset-backed securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 19.3 | 1.6
Significant Other Observable Inputs (Level 2) [Member] | Certificates of Deposit | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 1.6 |
Significant Unobservable Inputs (Level 3) [Member] |  |
Assets [Abstract] |  |
Total assets | 5.7 | 5.8
Liabilities [Abstract] |  |
Total liabilities | 0.0 | 0.0
Significant Unobservable Inputs (Level 3) [Member] | Cash and cash equivalents [Member] |  |
Assets [Abstract] |  |
Cash and cash equivalents | 0.0 | 0.0
Significant Unobservable Inputs (Level 3) [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 0.0
Equity Securities, FV-NI | 0.0 | 0.0
Total short-term investments | 0.0 | 0.0
Significant Unobservable Inputs (Level 3) [Member] | Prepaid Expenses and Other Current Assets [Member] |  |
Assets [Abstract] |  |
Derivative assets, Current | 0.0 | 0.0
Significant Unobservable Inputs (Level 3) [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 5.7 | 5.8
Significant Unobservable Inputs (Level 3) [Member] | Other long-term assets [Member] |  |
Assets [Abstract] |  |
Derivative assets, Noncurrent | 0.0 | 0.0
Significant Unobservable Inputs (Level 3) [Member] | Accrued liabilities [Member] |  |
Liabilities [Abstract] |  |
Derivative liabilities, Current | 0.0 | 0.0
Significant Unobservable Inputs (Level 3) [Member] | Other long-term liabilities [Member] |  |
Liabilities [Abstract] |  |
Derivative liabilities, Noncurrent | 0.0 | 0.0
Significant Unobservable Inputs (Level 3) [Member] | Commercial Paper [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 0.0
Significant Unobservable Inputs (Level 3) [Member] | Corporate debt securities [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 0.0
Significant Unobservable Inputs (Level 3) [Member] | Corporate debt securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 0.0
Significant Unobservable Inputs (Level 3) [Member] | Auction rate securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 5.7 | 5.8
Significant Unobservable Inputs (Level 3) [Member] | Foreign government obligations [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 |
Significant Unobservable Inputs (Level 3) [Member] | U.S. Government Treasury Securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 0.0
Significant Unobservable Inputs (Level 3) [Member] | State and local government obligations [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 0.0
Significant Unobservable Inputs (Level 3) [Member] | Mortgage and other asset-backed securities [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 |
Significant Unobservable Inputs (Level 3) [Member] | Mortgage and other asset-backed securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | $ 0.0
Significant Unobservable Inputs (Level 3) [Member] | Certificates of Deposit | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | $ 0.0 |

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