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Income Taxes (Changes in Unrecognized Tax Benefit) (Details) $ in Millions | 12 Months Ended
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Oct. 01, 2021 USD ($)
Income Tax Disclosure [Abstract] |
Balance at September 30, 2016 | $ 117.6
Decreases based on positions related to prior years | (28.6)
Increases based on positions related to current year | 5.4
Decreases relating to settlements with taxing authorities | (13.6)
Decreases relating to lapses of applicable statues of limitations | (25.5)
Balance at September 29, 2017 | $ 55.3

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