Income Taxes (Changes in Unrecognized Tax Benefit) (Details) $ in Millions	12 Months Ended
Oct. 02, 2020 USD ($)
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	$ 2.8
Balance at September 30, 2016	103.3
Decreases based on positions related to prior years	(3.9)
Increases based on positions related to current year	15.5
Decreases relating to settlements with taxing authorities	0.0
Decreases relating to lapses of applicable statues of limitations	(0.1)
Balance at September 29, 2017	$ 117.6

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Amount of unrecognized tax benefits.

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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