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Marketable Securities (Notes) | 12 Months Ended
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Oct. 01, 2021
Investments, Debt and Equity Securities [Abstract] |
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure | . MARKETABLE SECURITIES The Company's portfolio of available-for-sale marketable securities consists of the following (in millions):
| Current |  | Noncurrent
Available-for-sale: | October 1, 2021 |  | October 2, 2020 |  | October 1, 2021 |  | October 2, 2020
U.S. Treasury and government | $ | 7.6 |  |  | $ | 129.4 |  |  | $ | 6.0 |  |  | $ | 5.0 |
Corporate bonds and notes | 117.0 |  |  | 276.8 |  |  | — |  |  | — |
Municipal bonds | 12.6 |  |  | 1.9 |  |  | 1.1 |  |  | 0.2 |
Total | $ | 137.2 |  |  | $ | 408.1 |  |  | $ | 7.1 |  |  | $ | 5.2 |
The contractual maturities of noncurrent available-for-sale marketable securities were due within two years or less. There were no gross unrealized gains or losses as of October 1, 2021. There were gross unrealized gains of $0.3 million on U.S. Treasury securities and $0.2 million on corporate bonds and notes as of October 2, 2020.

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