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Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($)
$ in Millions
Oct. 01, 2023
Oct. 02, 2022
Assets [Abstract]    
Total short-term investments $ 401.5 $ 364.5
Derivative assets, Current 41.0 75.1
Derivative assets, Noncurrent 153.0 156.2
Total assets 4,394.3 3,693.3
Liabilities [Abstract]    
Derivative liabilities, Current 3.6 21.0
Derivative liabilities, Noncurrent 43.2 34.0
Total liabilities 46.8 $ 55.0
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]   Prepaid Expense and Other Assets, Current
Cash and cash equivalents [Member]    
Assets [Abstract]    
Cash and cash equivalents 3,551.5 $ 2,818.4
Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 70.7 31.7
Equity Securities, FV-NI 69.6 57.7
Structured deposits 261.2 275.1
Total short-term investments 401.5 364.5
Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 247.3 279.1
Corporate debt securities [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 64.0 22.4
Corporate debt securities [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 91.1 134.7
Foreign government obligations [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 3.9  
Foreign government obligations [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale   3.8
U.S. Government Treasury Securities [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 2.8 9.3
U.S. Government Treasury Securities [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 104.7 82.8
State and local government obligations [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 1.3 1.3
Mortgage and other asset-backed securities [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 50.2 56.5
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]    
Assets [Abstract]    
Derivative assets, Current 0.0 0.0
Derivative assets, Noncurrent 0.0 0.0
Total assets 3,728.6 2,947.1
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
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Cash and cash equivalents [Member]    
Assets [Abstract]    
Cash and cash equivalents 3,551.5 $ 2,797.3
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 2.8 9.3
Equity Securities, FV-NI 69.6 57.7
Structured deposits 0.0 0.0
Total short-term investments 72.4 67.0
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 104.7 82.8
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] | 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] | Foreign government obligations [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] | U.S. Government Treasury Securities [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 2.8 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 104.7 82.8
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] | 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 41.0 75.1
Derivative assets, Noncurrent 153.0 156.2
Total assets 665.7 746.2
Liabilities [Abstract]    
Derivative liabilities, Current 3.6 21.0
Derivative liabilities, Noncurrent 43.2 34.0
Total liabilities 46.8 $ 55.0
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]   Prepaid Expense and Other Assets, Current
Significant Other Observable Inputs (Level 2) [Member] | Cash and cash equivalents [Member]    
Assets [Abstract]    
Cash and cash equivalents 0.0 $ 21.1
Significant Other Observable Inputs (Level 2) [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 67.9 22.4
Equity Securities, FV-NI 0.0 0.0
Structured deposits 261.2 275.1
Total short-term investments 329.1 297.5
Significant Other Observable Inputs (Level 2) [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 142.6 196.3
Significant Other Observable Inputs (Level 2) [Member] | Corporate debt securities [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 64.0 22.4
Significant Other Observable Inputs (Level 2) [Member] | Corporate debt securities [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 91.1 134.7
Significant Other Observable Inputs (Level 2) [Member] | Foreign government obligations [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 3.9  
Significant Other Observable Inputs (Level 2) [Member] | Foreign government obligations [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale   3.8
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 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 1.3
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 50.2 56.5
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 0.0
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
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 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 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] | Foreign government obligations [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 0.0  
Significant Unobservable Inputs (Level 3) [Member] | Foreign government obligations [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale   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 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] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale $ 0.0 $ 0.0