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Income Taxes (Changes in Unrecognized Tax Benefit) (Details) $ in Millions | 12 Months Ended
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Sep. 27, 2019 USD ($)
Income Tax Disclosure [Abstract] |
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | $ 7.1
Balance at September 30, 2016 | 93.4
Decreases based on positions related to prior years | (0.3)
Increases based on positions related to current year | 9.6
Decreases relating to settlements with taxing authorities | (6.3)
Decreases relating to lapses of applicable statues of limitations | (0.2)
Balance at September 29, 2017 | $ 103.3

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