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Borrowings and Credit Arrangements - Company's Borrowings (Detail) - USD ($) $ in Millions	Apr. 01, 2023	Sep. 24, 2022
Debt Instrument [Line Items]
Current portion of long-term debt	$ 26.2	$ 15.0
Total long-term debt obligations	2,797.7	2,808.4
Total debt obligations	2,823.9	2,823.4
Term Loan
Debt Instrument [Line Items]
Current portion of long-term debt	26.2	15.0
Long term debt obligations. excluding convertible notes	1,463.6	1,475.7
2028 Senior Notes
Debt Instrument [Line Items]
Long term debt obligations. excluding convertible notes	396.4	396.1
2029 Senior Notes
Debt Instrument [Line Items]
Long term debt obligations. excluding convertible notes	$ 937.7	$ 936.6

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