Income Taxes (Reconciliation of the Statutory U.S. Federal Income Tax Rate With Our Effective Income Tax Rate) (Details)	12 Months Ended
Sep. 30, 2018	Oct. 01, 2017	Oct. 02, 2016
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	24.50%	35.00%	35.00%
State income taxes, net of federal tax benefit	2.10%	2.80%	3.00%
Benefits and taxes related to foreign operations	(0.10%)	(2.80%)	(2.20%)
Domestic production activity deduction	(0.00%)	(1.80%)	(1.90%)
Gain resulting from acquisition of joint venture	(5.80%)	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	2.80%	0.00%	0.00%
Other, net	(1.70%)	0.00%	(1.00%)
Effective tax rate	21.80%	33.20%	32.90%

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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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates.

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