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Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($)
$ in Millions
Apr. 02, 2023
Oct. 02, 2022
Assets:    
Total short-term investments $ 379.4 $ 364.5
Derivative assets, Current 24.2 75.1
Derivative assets, Noncurrent 92.8 156.2
Total Assets 3,819.4 3,693.3
Liabilities:    
Derivative liabilities, Current 22.6 21.0
Derivative liabilities, Noncurrent 42.8 34.0
Derivative Liabilities 65.4  
Total liabilities   55.0
Cash and cash equivalents    
Assets:    
Cash and cash equivalents 3,071.8 2,818.4
Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 63.2 31.7
Marketable equity securities 67.8 57.7
Total short-term investments 379.4 364.5
Structured deposits 248.4 275.1
Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 251.2 279.1
Commercial paper | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.1  
Corporate debt securities | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 53.2 22.4
Corporate debt securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 101.0 134.7
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 3.8  
Mortgage and other asset-backed securities | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.7  
Mortgage and other asset-backed securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 50.7 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 5.4 9.3
U.S. government treasury securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 98.2 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 3,243.2 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 3,071.8 2,797.3
Fair Value, Inputs, Level 1 [Member] | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 5.4 9.3
Marketable equity securities 67.8 57.7
Total short-term investments 73.2 67.0
Structured deposits 0.0 0.0
Fair Value, Inputs, Level 1 [Member] | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 98.2 82.8
Fair Value, Inputs, Level 1 [Member] | Commercial paper | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.0  
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 | 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 5.4 9.3
Fair Value, Inputs, Level 1 [Member] | U.S. government treasury securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 98.2 82.8
Fair Value, Inputs, Level 2 [Member]    
Assets:    
Derivative assets, Current 24.2 75.1
Derivative assets, Noncurrent 92.8 156.2
Total Assets 576.2 746.2
Liabilities:    
Derivative liabilities, Current 22.6 21.0
Derivative liabilities, Noncurrent 42.8 34.0
Derivative Liabilities 65.4  
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 57.8 22.4
Marketable equity securities 0.0 0.0
Total short-term investments 306.2 297.5
Structured deposits 248.4 275.1
Fair Value, Inputs, Level 2 [Member] | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 153.0 196.3
Fair Value, Inputs, Level 2 [Member] | Commercial paper | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.1  
Fair Value, Inputs, Level 2 [Member] | Corporate debt securities | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 53.2 22.4
Fair Value, Inputs, Level 2 [Member] | Corporate debt securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 101.0 134.7
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 3.8  
Fair Value, Inputs, Level 2 [Member] | Mortgage and other asset-backed securities | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 0.7  
Fair Value, Inputs, Level 2 [Member] | Mortgage and other asset-backed securities | Long-term Investments [Member]    
Assets:    
Available-for-sale debt securities 50.7 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] | Commercial paper | Short-term Investments [Member]    
Assets:    
Available-for-sale debt securities 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 | 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