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Marketable Securities (Notes) | 12 Months Ended
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Sep. 30, 2022
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
| September 30, 2022 |  | October 1, 2021 |  | September 30, 2022 |  | October 1, 2021
U.S. Treasury and government | $ | 13.1 |  |  | $ | 7.6 |  |  | $ | 0.5 |  |  | $ | 6.0 |
Corporate bonds and notes | 0.2 |  |  | 117.0 |  |  | — |  |  | — |
Municipal bonds | 7.0 |  |  | 12.6 |  |  | — |  |  | 1.1 |
Total marketable securities | $ | 20.3 |  |  | $ | 137.2 |  |  | $ | 0.5 |  |  | $ | 7.1 |
The contractual maturities of noncurrent available-for-sale marketable securities were within two years or less of issuance of the applicable securities. Neither gross unrealized gains and losses nor realized gains and losses were material as of September 30, 2022, and October 1, 2021, respectively.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI https://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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