Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions | Jul. 03, 2022 | Oct. 03, 2021 |
Assets: | | |
Total short-term investments | $ 76.9 | $ 162.2 |
Total Assets | 3,815.2 | 7,131.5 |
Liabilities: | | |
Total liabilities | 21.9 | 16.8 |
Cash and cash equivalents | | |
Assets: | | |
Cash and cash equivalents | 3,177.5 | 6,455.7 |
Short-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 15.1 | 87.8 |
Marketable equity securities | 61.8 | 74.4 |
Total short-term investments | 76.9 | 162.2 |
Prepaid Expenses and Other Current Assets [Member] | | |
Assets: | | |
Derivative assets, Current | 47.1 | 147.6 |
Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 292.5 | 281.7 |
Other Long-Term Assets [Member] | | |
Assets: | | |
Derivative assets, Noncurrent | 191.3 | 84.3 |
Structured Deposit | 29.9 | |
Accrued Liabilities [Member] | | |
Liabilities: | | |
Derivative liabilities, Current | 4.1 | 8.6 |
Other Long-Term Liabilities [Member] | | |
Liabilities: | | |
Derivative liabilities, Noncurrent | 17.8 | 8.2 |
Auction rate securities | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | | 6 |
Commercial paper | Short-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 0.2 | 63 |
Corporate debt securities | Short-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 14.7 | 24.7 |
Corporate debt securities | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 145 | 162 |
Foreign government obligations | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 3.8 | |
Foreign Government Obligations [Member] | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | | 4 |
Mortgage and other asset-backed securities | Short-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | | 0.1 |
Mortgage and other asset-backed securities | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 56.8 | 31.9 |
State and local government obligations | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 1.4 | 1.5 |
U.S. government treasury securities | Short-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 0.2 | |
U.S. government treasury securities | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 85.5 | 76.3 |
Fair Value, Inputs, Level 1 [Member] | | |
Assets: | | |
Total Assets | 3,325 | 6,737.5 |
Liabilities: | | |
Total liabilities | 0 | 0.3 |
Fair Value, Inputs, Level 1 [Member] | Cash and cash equivalents | | |
Assets: | | |
Cash and cash equivalents | 3,177.5 | 6,455.7 |
Fair Value, Inputs, Level 1 [Member] | Short-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 0.2 | 0 |
Marketable equity securities | 61.8 | 74.4 |
Total short-term investments | 62 | 74.4 |
Fair Value, Inputs, Level 1 [Member] | Prepaid Expenses and Other Current Assets [Member] | | |
Assets: | | |
Derivative assets, Current | 0 | 131.1 |
Fair Value, Inputs, Level 1 [Member] | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 85.5 | 76.3 |
Fair Value, Inputs, Level 1 [Member] | Other Long-Term Assets [Member] | | |
Assets: | | |
Derivative assets, Noncurrent | 0 | 0 |
Structured Deposit | 0 | |
Fair Value, Inputs, Level 1 [Member] | Accrued Liabilities [Member] | | |
Liabilities: | | |
Derivative liabilities, Current | 0 | 0.3 |
Fair Value, Inputs, Level 1 [Member] | Other Long-Term Liabilities [Member] | | |
Liabilities: | | |
Derivative liabilities, Noncurrent | 0 | 0 |
Fair Value, Inputs, Level 1 [Member] | Auction rate securities | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | | 0 |
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 |
Fair Value, Inputs, Level 1 [Member] | Corporate debt securities | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 0 | 0 |
Fair Value, Inputs, Level 1 [Member] | Foreign government obligations | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 0 | |
Fair Value, Inputs, Level 1 [Member] | Foreign Government Obligations [Member] | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | | 0 |
Fair Value, Inputs, Level 1 [Member] | Mortgage and other asset-backed securities | Short-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | | 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 |
Fair Value, Inputs, Level 1 [Member] | State and local government obligations | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 0 | 0 |
Fair Value, Inputs, Level 1 [Member] | U.S. government treasury securities | Short-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 0.2 | |
Fair Value, Inputs, Level 1 [Member] | U.S. government treasury securities | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 85.5 | 76.3 |
Fair Value, Inputs, Level 2 [Member] | | |
Assets: | | |
Total Assets | 490.2 | 388 |
Liabilities: | | |
Total liabilities | 21.9 | 16.5 |
Fair Value, Inputs, Level 2 [Member] | Cash and cash equivalents | | |
Assets: | | |
Cash and cash equivalents | 0 | 0 |
Fair Value, Inputs, Level 2 [Member] | Short-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 14.9 | 87.8 |
Marketable equity securities | 0 | 0 |
Total short-term investments | 14.9 | 87.8 |
Fair Value, Inputs, Level 2 [Member] | Prepaid Expenses and Other Current Assets [Member] | | |
Assets: | | |
Derivative assets, Current | 47.1 | 16.5 |
Fair Value, Inputs, Level 2 [Member] | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 207 | 199.4 |
Fair Value, Inputs, Level 2 [Member] | Other Long-Term Assets [Member] | | |
Assets: | | |
Derivative assets, Noncurrent | 191.3 | 84.3 |
Structured Deposit | 29.9 | |
Fair Value, Inputs, Level 2 [Member] | Accrued Liabilities [Member] | | |
Liabilities: | | |
Derivative liabilities, Current | 4.1 | 8.3 |
Fair Value, Inputs, Level 2 [Member] | Other Long-Term Liabilities [Member] | | |
Liabilities: | | |
Derivative liabilities, Noncurrent | 17.8 | 8.2 |
Fair Value, Inputs, Level 2 [Member] | Auction rate securities | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | | 0 |
Fair Value, Inputs, Level 2 [Member] | Commercial paper | Short-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 0.2 | 63 |
Fair Value, Inputs, Level 2 [Member] | Corporate debt securities | Short-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 14.7 | 24.7 |
Fair Value, Inputs, Level 2 [Member] | Corporate debt securities | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 145 | 162 |
Fair Value, Inputs, Level 2 [Member] | Foreign government obligations | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 3.8 | |
Fair Value, Inputs, Level 2 [Member] | Foreign Government Obligations [Member] | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | | 4 |
Fair Value, Inputs, Level 2 [Member] | Mortgage and other asset-backed securities | Short-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | | 0.1 |
Fair Value, Inputs, Level 2 [Member] | Mortgage and other asset-backed securities | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 56.8 | 31.9 |
Fair Value, Inputs, Level 2 [Member] | State and local government obligations | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 1.4 | 1.5 |
Fair Value, Inputs, Level 2 [Member] | U.S. government treasury securities | Short-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 0 | |
Fair Value, Inputs, Level 2 [Member] | U.S. government treasury securities | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 0 | 0 |
Fair Value, Inputs, Level 3 [Member] | | |
Assets: | | |
Total Assets | 0 | 6 |
Liabilities: | | |
Total liabilities | 0 | 0 |
Fair Value, Inputs, Level 3 [Member] | Cash and cash equivalents | | |
Assets: | | |
Cash and cash equivalents | 0 | 0 |
Fair Value, Inputs, Level 3 [Member] | Short-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 0 | 0 |
Marketable equity securities | 0 | 0 |
Total short-term investments | 0 | 0 |
Fair Value, Inputs, Level 3 [Member] | Prepaid Expenses and Other Current Assets [Member] | | |
Assets: | | |
Derivative assets, Current | 0 | 0 |
Fair Value, Inputs, Level 3 [Member] | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 0 | 6 |
Fair Value, Inputs, Level 3 [Member] | Other Long-Term Assets [Member] | | |
Assets: | | |
Derivative assets, Noncurrent | 0 | 0 |
Structured Deposit | 0 | |
Fair Value, Inputs, Level 3 [Member] | Accrued Liabilities [Member] | | |
Liabilities: | | |
Derivative liabilities, Current | 0 | 0 |
Fair Value, Inputs, Level 3 [Member] | Other Long-Term Liabilities [Member] | | |
Liabilities: | | |
Derivative liabilities, Noncurrent | 0 | 0 |
Fair Value, Inputs, Level 3 [Member] | Auction rate securities | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | | 6 |
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 |
Fair Value, Inputs, Level 3 [Member] | Corporate debt securities | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 0 | 0 |
Fair Value, Inputs, Level 3 [Member] | Foreign government obligations | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 0 | |
Fair Value, Inputs, Level 3 [Member] | Foreign Government Obligations [Member] | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | | 0 |
Fair Value, Inputs, Level 3 [Member] | Mortgage and other asset-backed securities | Short-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | | 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 |
Fair Value, Inputs, Level 3 [Member] | State and local government obligations | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 0 | 0 |
Fair Value, Inputs, Level 3 [Member] | U.S. government treasury securities | Short-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | 0 | |
Fair Value, Inputs, Level 3 [Member] | U.S. government treasury securities | Long-term Investments [Member] | | |
Assets: | | |
Available-for-sale debt securities | $ 0 | $ 0 |