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Fair Value Measurements (Schedule of Financial Assets and Liabilities Measured at Fair Value) (Details) - USD ($) $ in Thousands | Mar. 28, 2020 | Sep. 30, 2019
--- | --- | ---
Financial assets: |  |
Cash equivalents | $ 616,556 | $ 108,020
Marketable securities: | 56,941 | 57,435
Forward contracts | 2,708 | 3,064
Financial assets, fair value | 676,205 | 168,519
Financial liabilities: |  |
Forward contracts | 4,074 | 2,771
Financial liabilities, fair value | 4,074 | 2,771
Level 1 |  |
Financial assets: |  |
Cash equivalents | 616,556 | 108,020
Financial assets, fair value | 672,015 | 164,456
Level 2 |  |
Financial assets: |  |
Forward contracts | 2,708 | 3,064
Financial assets, fair value | 4,190 | 4,063
Financial liabilities: |  |
Forward contracts | 4,074 | 2,771
Financial liabilities, fair value | 4,074 | 2,771
Commercial paper |  |
Financial assets: |  |
Marketable securities: | 1,482 | 999
Commercial paper | Level 2 |  |
Financial assets: |  |
Marketable securities: | 1,482 | 999
Corporate notes/bonds |  |
Financial assets: |  |
Marketable securities: | 55,459 | 56,436
Corporate notes/bonds | Level 1 |  |
Financial assets: |  |
Marketable securities: | $ 55,459 | $ 56,436

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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