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Fair Value (Tables) | 12 Months Ended
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Oct. 02, 2020
Fair Value Disclosures [Abstract] |
Fair Value, Assets Measured on Recurring Basis | Assets and liabilities recorded at fair value on a recurring basis consisted of the following (in millions):
| As of October 2, 2020 |  | As of September 27, 2019
|  |  | Fair Value Measurements |  |  |  | Fair Value Measurements
| Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents* | $ | 566.7 |  |  | $ | 561.2 |  |  | $ | 5.5 |  |  | $ | — |  |  | $ | 851.3 |  |  | $ | 809.5 |  |  | $ | 41.8 |  |  | $ | — |
U.S. Treasury and government securities | 134.4 |  |  | 43.2 |  |  | 91.2 |  |  | — |  |  | 54.2 |  |  | 28.4 |  |  | 25.8 |  |  | — |
Corporate bonds and notes | 276.8 |  |  | — |  |  | 276.8 |  |  | — |  |  | 72.1 |  |  | — |  |  | 72.1 |  |  | — |
Municipal bonds | 2.1 |  |  | — |  |  | 2.1 |  |  | — |  |  | 104.6 |  |  | — |  |  | 104.6 |  |  | — |
Total | $ | 980.0 |  |  | $ | 604.4 |  |  | $ | 375.6 |  |  | $ | — |  |  | $ | 1,082.2 |  |  | $ | 837.9 |  |  | $ | 244.3 |  |  | $ | — |
* Cash equivalents included in Levels 1 and 2 consist of money market funds and corporate bonds and notes, commercial paper, and agency securities purchased with less than ninety days until maturity.

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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