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Income Taxes (Narrative) (Details) - USD ($) $ in Millions			3 Months Ended	12 Months Ended
	Jan. 01, 2018	Dec. 31, 2017	Dec. 30, 2017	Sep. 29, 2018	Sep. 28, 2019
Income Taxes [Abstract]
Federal corporate tax rate	21.00%	35.00%
Decrease in net deferred tax liabilities as a result of the decrease in the federal rate			$ 26.7	$ 10.6
Refundable current income taxes				$ 36.7	$ 1.0

X

- Definition

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

+ References

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-Publisher FASB
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No definition available.

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- Definition

Carrying amount as of the balance sheet date of income taxes previously overpaid to tax authorities (such as U.S. Federal, state and local tax authorities) representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Also called income tax refund receivable.

+ References

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- Definition

Amount of reasonable estimate for income tax benefit for which accounting for tax effect for remeasurement of deferred tax liability from change in tax rate is incomplete pursuant to Tax Cuts and Jobs Act.

+ References

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