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Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($)
$ in Millions
Sep. 28, 2025
Sep. 29, 2024
Assets [Abstract]    
Total short-term investments $ 247.2 $ 257.0
Derivative assets, Current 15.9 8.7
Derivative assets, Noncurrent 278.6 179.1
Total assets 4,008.4 4,007.0
Liabilities [Abstract]    
Derivative liabilities, Current 7.1 29.2
Derivative liabilities, Noncurrent 20.9 56.7
Total liabilities 28.0 85.9
Cash and cash equivalents [Member]    
Assets [Abstract]    
Cash and cash equivalents 3,219.8 3,286.2
Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 151.9 90.7
Equity Securities, FV-NI 95.3 82.2
Structured deposits   84.1
Total short-term investments 247.2 257.0
Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 246.9 275.8
Other Long-Term Investments 246.9 276.0
Structured deposits   0.2
Corporate debt securities [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 67.8 51.8
Corporate debt securities [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 132.2 112.8
U.S. Government Treasury Securities [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 82.6 36.9
U.S. Government Treasury Securities [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 36.3 94.9
State and local government obligations [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 1.1 1.4
State and local government obligations [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 2.7 3.7
Mortgage and other asset-backed securities [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 0.4 0.4
Mortgage and other asset-backed securities [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 75.7 64.4
Corporate Bond Securities | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale   0.2
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 3,434.0 3,500.2
Liabilities [Abstract]    
Derivative liabilities, Current 0.0 0.0
Derivative liabilities, Noncurrent 0.0 0.0
Total liabilities 0.0 0.0
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Cash and cash equivalents [Member]    
Assets [Abstract]    
Cash and cash equivalents 3,219.8 3,286.2
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 82.6 36.9
Equity Securities, FV-NI 95.3 82.2
Structured deposits   0.0
Total short-term investments 177.9 119.1
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 36.3 94.9
Other Long-Term Investments 36.3 94.9
Structured deposits   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] | U.S. Government Treasury Securities [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 82.6 36.9
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 36.3 94.9
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | State and local government obligations [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] | 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 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] | Corporate Bond Securities | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale   0.0
Significant Other Observable Inputs (Level 2) [Member]    
Assets [Abstract]    
Derivative assets, Current 15.9 8.7
Derivative assets, Noncurrent 278.6 179.1
Total assets 535.8 495.8
Liabilities [Abstract]    
Derivative liabilities, Current 7.1 29.2
Derivative liabilities, Noncurrent 20.9 56.7
Total liabilities 28.0 85.9
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 57.4 53.8
Equity Securities, FV-NI 0.0 0.0
Structured deposits   84.1
Total short-term investments 57.4 137.9
Significant Other Observable Inputs (Level 2) [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 183.9 169.9
Other Long-Term Investments 183.9 170.1
Structured deposits   0.2
Significant Other Observable Inputs (Level 2) [Member] | Corporate debt securities [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 55.9 51.8
Significant Other Observable Inputs (Level 2) [Member] | Corporate debt securities [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 105.5 101.8
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] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 1.1 1.4
Significant Other Observable Inputs (Level 2) [Member] | State and local government obligations [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 2.7 3.7
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 0.4 0.4
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 75.7 64.4
Significant Other Observable Inputs (Level 2) [Member] | Corporate Bond Securities | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale   0.2
Significant Unobservable Inputs (Level 3) [Member]    
Assets [Abstract]    
Derivative assets, Current 0.0 0.0
Derivative assets, Noncurrent 0.0 0.0
Total assets 38.6 11.0
Liabilities [Abstract]    
Derivative liabilities, Current 0.0 0.0
Derivative liabilities, Noncurrent 0.0 0.0
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 11.9 0.0
Equity Securities, FV-NI 0.0 0.0
Structured deposits   0.0
Total short-term investments 11.9 0.0
Significant Unobservable Inputs (Level 3) [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 26.7 11.0
Other Long-Term Investments 26.7 11.0
Structured deposits   0.0
Significant Unobservable Inputs (Level 3) [Member] | Corporate debt securities [Member] | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 11.9 0.0
Significant Unobservable Inputs (Level 3) [Member] | Corporate debt securities [Member] | Long-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale 26.7 11.0
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] | Short-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 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] | Corporate Bond Securities | Short-term investments [Member]    
Assets [Abstract]    
Debt Securities, Available-for-sale   $ 0.0