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Income Taxes (Changes in Unrecognized Tax Benefit) (Details) $ in Millions | 12 Months Ended
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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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