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Fair Value Measurements - Cash and Cash Equivalents (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Jun. 29, 2024 | Sep. 30, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cost | $ 2,439.1 | $ 2,722.5
Unrealized Gains | 0.0 |
Unrealized Losses | 0.0 |
Fair Value | 2,439.1 |
Cash and Cash Equivalents |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value | 2,439.1 |
Cash |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cost | 1,620.3 |
Unrealized Gains | 0.0 |
Unrealized Losses | 0.0 |
Fair Value | 1,620.3 |
Cash | Cash and Cash Equivalents |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value | 1,620.3 |
Money Market Funds |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cost | 371.2 |
Unrealized Gains | 0.0 |
Unrealized Losses | 0.0 |
Fair Value | 371.2 |
Money Market Funds | Cash and Cash Equivalents |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value | 371.2 |
US Treasury Securities |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cost | 398.1 |
Unrealized Gains | 0.0 |
Unrealized Losses | 0.0 |
Fair Value | 398.1 |
US Treasury Securities | Cash and Cash Equivalents |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value | 398.1 |
Commercial Paper |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cost | 49.5 |
Unrealized Gains | 0.0 |
Unrealized Losses | 0.0 |
Fair Value | 49.5 |
Commercial Paper | Cash and Cash Equivalents |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value | $ 49.5 |

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- Definition Amount 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. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483467/210-10-45-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-4 + Details
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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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