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Income Taxes (Narrative) (Details) - USD ($) $ in Millions			3 Months Ended		12 Months Ended
	Jan. 01, 2018	Dec. 31, 2017	Jun. 30, 2018	Dec. 30, 2017	Sep. 28, 2019	Sep. 29, 2018
Federal corporate tax rate	21.00%	35.00%
Blended federal corporate tax rate						24.50%
Decrease in net deferred tax liabilities as a result of the decrease in the federal rate			$ (10.6)	$ (26.7)
Forecast [Member]
Blended federal corporate tax rate					21.00%

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- Definition

Blended Federal Corporate Tax Rate

+ References

No definition available.

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
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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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2A
-Subparagraph (SAB Topic 5.EE.Q2(b))
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