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Fair Value (Tables)

3 Months Ended

Dec. 27, 2024

Fair Value Disclosures [Abstract]

Fair Value Assets and Liabilities Measured on Recurring Basis

Assets and liabilities recorded at fair value on a recurring basis consisted of the following (in millions):         

			As of
			December 27, 2024																								September 27, 2024
									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 (1)			$	1,602.5					$	1,418.6					$	183.9					$	—					$	1,368.6					$	1,199.1					$	169.5					$	—
U.S. Treasury and government securities			60.9						42.1						18.8						—						50.1						36.5						13.6						—
Corporate bonds and notes			91.4						—						91.4						—						155.3						—						155.3						—
Municipal bonds			—						—						—						—						0.1						—						0.1						—
Total assets at fair value			$	1,754.8					$	1,460.7					$	294.1					$	—					$	1,574.1					$	1,235.6					$	338.5					$	—

(1) Cash equivalents included in Levels 1 and 2 consist of money market funds, corporate bonds and notes, and U.S. Treasury and government securities purchased with less than ninety days until maturity.

Carrying Values and Estimated Fair Values of Debt Instruments

The carrying amount and estimated fair value of debt consists of the following (in millions):

			As of
			December 27, 2024												September 27, 2024
			Carrying Amount						Estimated Fair Value						Carrying Amount						Estimated Fair Value
1.80% Senior Notes due 2026			$	498.8					$	478.5					$	498.5					$	478.4
3.00% Senior Notes due 2031			495.9						429.4						495.8						441.2
Total debt under Senior Notes			$	994.7					$	907.9					$	994.3					$	919.6

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- References

No definition available.

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- Definition

Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements.

+ References

No definition available.

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- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, 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://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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