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FAIR VALUE MEASUREMENTS - Rollforward (Details) - Debt Securities - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 28, 2025	Jun. 29, 2024	Jun. 28, 2025	Jun. 29, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at beginning of period	$ 28.1	$ 84.5	$ 45.8	$ 85.8
Total realized / unrealized gains (losses) included in net earnings	0.0	0.1	(7.0)	0.3
Total realized / unrealized gains (losses) included in OCI	(0.6)	5.1	(0.6)	3.6
Exchange for non-voting exchangeable shares of Fluent	0.0	0.0	(10.7)	0.0
Fair value at end of period	$ 27.5	$ 89.7	$ 27.5	$ 89.7

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- Definition

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Exchange

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

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Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3).

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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