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FAIR VALUE MEASUREMENTS - Narrative (Details) - Convertible debt investments - USD ($) $ in Millions	3 Months Ended
	Dec. 28, 2024	Sep. 30, 2024	Dec. 30, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cost basis of investment	$ 44.4	$ 62.1	$ 225.9
Gross unrealized losses on convertible debt instruments	16.4	16.4	140.9
Allowance for expected credit losses	$ 1.9	$ 1.9	$ 101.3
Debt term	4 years 8 months 12 days

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Cost of the investment.

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