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Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($)
$ in Millions
Jul. 02, 2023
Oct. 02, 2022
Assets:    
Total short-term investments $ 263.0 $ 364.5
Derivative assets, Current 34.3 75.1
Derivative assets, Noncurrent 134.7 156.2
Total Assets 4,027.6 3,693.3
Liabilities:    
Derivative liabilities, Current 24.6 21.0
Derivative liabilities, Noncurrent 42.6 34.0
Derivative Liabilities 67.2  
Total liabilities   55.0
Cash and cash equivalents    
Assets:    
Cash and cash equivalents 3,357.0 2,818.4
Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 79.2 31.7
Marketable equity securities 72.7 57.7
Total short-term investments 263.0 364.5
Structured deposits 111.1 275.1
Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 238.6 279.1
Corporate debt securities | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 68.4 22.4
Corporate debt securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 86.3 134.7
Foreign Government Obligations [Member] | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities   3.8
Foreign Government Short-term Debt Securities | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 3.9  
Mortgage and other asset-backed securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 47.5 56.5
State and local government obligations | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 1.3 1.3
U.S. government treasury securities | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 6.9 9.3
U.S. government treasury securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 103.5 82.8
Fair Value, Inputs, Level 1 [Member]    
Assets:    
Derivative assets, Current 0.0 0.0
Derivative assets, Noncurrent 0.0 0.0
Total Assets 3,540.1 2,947.1
Liabilities:    
Derivative liabilities, Current 0.0 0.0
Derivative liabilities, Noncurrent 0.0 0.0
Derivative Liabilities 0.0  
Total liabilities   0.0
Fair Value, Inputs, Level 1 [Member] | Cash and cash equivalents    
Assets:    
Cash and cash equivalents 3,357.0 2,797.3
Fair Value, Inputs, Level 1 [Member] | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 6.9 9.3
Marketable equity securities 72.7 57.7
Total short-term investments 79.6 67.0
Structured deposits 0.0 0.0
Fair Value, Inputs, Level 1 [Member] | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 103.5 82.8
Fair Value, Inputs, Level 1 [Member] | Corporate debt securities | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.0 0.0
Fair Value, Inputs, Level 1 [Member] | Corporate debt securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.0 0.0
Fair Value, Inputs, Level 1 [Member] | Foreign Government Obligations [Member] | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities   0.0
Fair Value, Inputs, Level 1 [Member] | Foreign Government Short-term Debt Securities | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.0  
Fair Value, Inputs, Level 1 [Member] | Mortgage and other asset-backed securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.0 0.0
Fair Value, Inputs, Level 1 [Member] | State and local government obligations | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.0 0.0
Fair Value, Inputs, Level 1 [Member] | U.S. government treasury securities | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 6.9 9.3
Fair Value, Inputs, Level 1 [Member] | U.S. government treasury securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 103.5 82.8
Fair Value, Inputs, Level 2 [Member]    
Assets:    
Derivative assets, Current 34.3 75.1
Derivative assets, Noncurrent 134.7 156.2
Total Assets 487.5 746.2
Liabilities:    
Derivative liabilities, Current 24.6 21.0
Derivative liabilities, Noncurrent 42.6 34.0
Derivative Liabilities 67.2  
Total liabilities   55.0
Fair Value, Inputs, Level 2 [Member] | Cash and cash equivalents    
Assets:    
Cash and cash equivalents 0.0 21.1
Fair Value, Inputs, Level 2 [Member] | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 72.3 22.4
Marketable equity securities 0.0 0.0
Total short-term investments 183.4 297.5
Structured deposits 111.1 275.1
Fair Value, Inputs, Level 2 [Member] | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 135.1 196.3
Fair Value, Inputs, Level 2 [Member] | Corporate debt securities | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 68.4 22.4
Fair Value, Inputs, Level 2 [Member] | Corporate debt securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 86.3 134.7
Fair Value, Inputs, Level 2 [Member] | Foreign Government Obligations [Member] | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities   3.8
Fair Value, Inputs, Level 2 [Member] | Foreign Government Short-term Debt Securities | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 3.9  
Fair Value, Inputs, Level 2 [Member] | Mortgage and other asset-backed securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 47.5 56.5
Fair Value, Inputs, Level 2 [Member] | State and local government obligations | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 1.3 1.3
Fair Value, Inputs, Level 2 [Member] | U.S. government treasury securities | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.0 0.0
Fair Value, Inputs, Level 2 [Member] | U.S. government treasury securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.0 0.0
Fair Value, Inputs, Level 3 [Member]    
Assets:    
Derivative assets, Current 0.0 0.0
Derivative assets, Noncurrent 0.0 0.0
Total Assets 0.0 0.0
Liabilities:    
Derivative liabilities, Current 0.0 0.0
Derivative liabilities, Noncurrent 0.0 0.0
Derivative Liabilities 0.0  
Total liabilities   0.0
Fair Value, Inputs, Level 3 [Member] | Cash and cash equivalents    
Assets:    
Cash and cash equivalents 0.0 0.0
Fair Value, Inputs, Level 3 [Member] | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.0 0.0
Marketable equity securities 0.0 0.0
Total short-term investments 0.0 0.0
Structured deposits 0.0 0.0
Fair Value, Inputs, Level 3 [Member] | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.0 0.0
Fair Value, Inputs, Level 3 [Member] | Corporate debt securities | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.0 0.0
Fair Value, Inputs, Level 3 [Member] | Corporate debt securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.0 0.0
Fair Value, Inputs, Level 3 [Member] | Foreign Government Obligations [Member] | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities   0.0
Fair Value, Inputs, Level 3 [Member] | Foreign Government Short-term Debt Securities | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.0  
Fair Value, Inputs, Level 3 [Member] | Mortgage and other asset-backed securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.0 0.0
Fair Value, Inputs, Level 3 [Member] | State and local government obligations | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.0 0.0
Fair Value, Inputs, Level 3 [Member] | U.S. government treasury securities | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.0 0.0
Fair Value, Inputs, Level 3 [Member] | U.S. government treasury securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities $ 0.0 $ 0.0