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Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions | Oct. 02, 2022 | Oct. 03, 2021
--- | --- | ---
Assets [Abstract] |  |
Total short-term investments | $ 364.5 | $ 162.2
Derivative assets, Current | 75.1 | 147.6
Derivative assets, Noncurrent | 156.2 | 84.3
Total assets | 3,693.3 | 7,131.5
Liabilities [Abstract] |  |
Derivative liabilities, Current | 21.0 | 8.6
Derivative liabilities, Noncurrent | 34.0 | 8.2
Total liabilities | $ 55.0 | $ 16.8
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration] | Prepaid Expense and Other Assets, Current | Prepaid Expense and Other Assets, Current
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other Assets, Noncurrent | Other Assets, Noncurrent
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] | Accrued Liabilities, Current | Accrued Liabilities, Current
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Deferred Tax and Other Liabilities, Noncurrent | Deferred Tax and Other Liabilities, Noncurrent
Cash and cash equivalents [Member] |  |
Assets [Abstract] |  |
Cash and cash equivalents | $ 2,818.4 | $ 6,455.7
Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 31.7 | 87.8
Equity Securities, FV-NI | 57.7 | 74.4
Structured deposits | 275.1 |
Total short-term investments | 364.5 | 162.2
Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 279.1 | 281.7
Commercial Paper [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale |  | 63.0
Corporate debt securities [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 22.4 | 24.7
Corporate debt securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 134.7 | 162.0
Auction rate securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale |  | 6.0
Foreign government obligations [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 3.8 | 4.0
U.S. Government Treasury Securities [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 9.3 |
U.S. Government Treasury Securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 82.8 | 76.3
State and local government obligations [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 1.3 | 1.5
Mortgage and other asset-backed securities [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale |  | 0.1
Mortgage and other asset-backed securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 56.5 | 31.9
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] |  |
Assets [Abstract] |  |
Derivative assets, Current | 0.0 | 131.1
Derivative assets, Noncurrent | 0.0 | 0.0
Total assets | 2,947.1 | 6,737.5
Liabilities [Abstract] |  |
Derivative liabilities, Current | 0.0 | 0.3
Derivative liabilities, Noncurrent | 0.0 | 0.0
Total liabilities | $ 0.0 | $ 0.3
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration] | Prepaid Expense and Other Assets, Current | Prepaid Expense and Other Assets, Current
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other Assets, Noncurrent | Other Assets, Noncurrent
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] | Accrued Liabilities, Current | Accrued Liabilities, Current
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Deferred Tax and Other Liabilities, Noncurrent | Deferred Tax and Other Liabilities, Noncurrent
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Cash and cash equivalents [Member] |  |
Assets [Abstract] |  |
Cash and cash equivalents | $ 2,797.3 | $ 6,455.7
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 9.3 | 0.0
Equity Securities, FV-NI | 57.7 | 74.4
Structured deposits | 0.0 |
Total short-term investments | 67.0 | 74.4
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 82.8 | 76.3
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
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
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Foreign 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] | U.S. Government Treasury Securities [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 9.3 |
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 | 82.8 | 76.3
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
Significant Other Observable Inputs (Level 2) [Member] |  |
Assets [Abstract] |  |
Derivative assets, Current | 75.1 | 16.5
Derivative assets, Noncurrent | 156.2 | 84.3
Total assets | 746.2 | 388.0
Liabilities [Abstract] |  |
Derivative liabilities, Current | 21.0 | 8.3
Derivative liabilities, Noncurrent | 34.0 | 8.2
Total liabilities | $ 55.0 | $ 16.5
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration] | Prepaid Expense and Other Assets, Current | Prepaid Expense and Other Assets, Current
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other Assets, Noncurrent | Other Assets, Noncurrent
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] | Accrued Liabilities, Current | Accrued Liabilities, Current
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Deferred Tax and Other Liabilities, Noncurrent | Deferred Tax and Other Liabilities, Noncurrent
Significant Other Observable Inputs (Level 2) [Member] | Cash and cash equivalents [Member] |  |
Assets [Abstract] |  |
Cash and cash equivalents | $ 21.1 | $ 0.0
Significant Other Observable Inputs (Level 2) [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 22.4 | 87.8
Equity Securities, FV-NI | 0.0 | 0.0
Structured deposits | 275.1 |
Total short-term investments | 297.5 | 87.8
Significant Other Observable Inputs (Level 2) [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 196.3 | 199.4
Significant Other Observable Inputs (Level 2) [Member] | Commercial Paper [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale |  | 63.0
Significant Other Observable Inputs (Level 2) [Member] | Corporate debt securities [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 22.4 | 24.7
Significant Other Observable Inputs (Level 2) [Member] | Corporate debt securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 134.7 | 162.0
Significant Other Observable Inputs (Level 2) [Member] | Auction rate securities [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale |  | 0.0
Significant Other Observable Inputs (Level 2) [Member] | Foreign government obligations [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 3.8 | 4.0
Significant Other Observable Inputs (Level 2) [Member] | U.S. Government Treasury Securities [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 |
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 | 1.3 | 1.5
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 |  | 0.1
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 | 56.5 | 31.9
Significant Unobservable Inputs (Level 3) [Member] |  |
Assets [Abstract] |  |
Derivative assets, Current | 0.0 | 0.0
Derivative assets, Noncurrent | 0.0 | 0.0
Total assets | 0.0 | 6.0
Liabilities [Abstract] |  |
Derivative liabilities, Current | 0.0 | 0.0
Derivative liabilities, Noncurrent | 0.0 | 0.0
Total liabilities | $ 0.0 | $ 0.0
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration] | Prepaid Expense and Other Assets, Current | Prepaid Expense and Other Assets, Current
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other Assets, Noncurrent | Other Assets, Noncurrent
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] | Accrued Liabilities, Current | Accrued Liabilities, Current
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Deferred Tax and Other Liabilities, Noncurrent | Deferred Tax and Other Liabilities, Noncurrent
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
Structured deposits | 0.0 |
Total short-term investments | 0.0 | 0.0
Significant Unobservable Inputs (Level 3) [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 6.0
Significant Unobservable Inputs (Level 3) [Member] | Commercial Paper [Member] | Short-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale |  | 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 |  | 6.0
Significant Unobservable Inputs (Level 3) [Member] | Foreign government obligations [Member] | Long-term investments [Member] |  |
Assets [Abstract] |  |
Debt Securities, Available-for-sale | 0.0 | 0.0
Significant Unobservable Inputs (Level 3) [Member] | U.S. Government Treasury Securities [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

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