Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jun. 30, 2017	Jul. 01, 2016	Jun. 30, 2017	Jul. 01, 2016
Income Tax Disclosure [Abstract]
Effective tax rate	19.70%	21.70%	19.80%	17.70%
Federal statutory income tax rate	35.00%	35.00%	35.00%	35.00%
Tax adjustments				$ (2.6)
Benefit from reduction of reserve for uncertain tax benefits			$ 1.2	24.0
Accrued Taxes, Current	$ 20.3		$ 20.3
Research and development tax credit		$ 10.2		$ 10.2

Benefit To Tax Expense Resulting From Reversal of Uncertain Tax Positions from Audit Settlement

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- Definition

Research and Development Tax Credit

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Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due. This amount is the total of current and noncurrent accrued income taxes.

+ References

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-Publisher FASB
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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

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