Income Taxes - Income Tax Expense (Benefit) Related to Continuing Operations (Details)	12 Months Ended
Sep. 24, 2023	Sep. 25, 2022	Sep. 26, 2021
(Percent of (Loss) Income Before Income Taxes)
Computed “expected” income tax expense	21.00%	21.00%	21.00%
State income tax benefit, net of federal tax benefit	(5.40%)	(8.90%)	5.60%
Net income of associated companies	31.20%	(77.20%)	(1.80%)
Resolution of tax matters	69.70%	(32.20%)	3.20%
Remeasurement due to state rate changes	(84.00%)	(11.20%)	0.10%
Non-deductible expenses	(28.50%)	124.00%	0.90%
Provision to return adjustment	(0.50%)	70.20%	0.00%
Valuation allowance	16.00%	11.90%	(6.00%)
Wage credit, net addback	0.00%	(7.50%)	0.00%
Warrant valuation	0.00%	(1.90%)	(0.40%)
Interest and penalties	(9.00%)	0.00%	0.00%
Other	0.80%	0.00%	0.00%
Total percent of income (loss) before income taxes	11.30%	88.20%	22.60%

Effective Income Tax Rate Reconciliation, Interest and Penalties, Percent

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Effective Income Tax Rate Reconciliation, Provision To Return Adjustment, Percent

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Effective Income Tax Rate Reconciliation, Wage Credit Net Addback Adjustment, Percent

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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-12

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

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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-Name Accounting Standards Codification
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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 valuation allowance for deferred tax assets.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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 equity in earnings (loss) of unconsolidated subsidiaries exempt from income taxes.

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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 applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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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 income tax settlements. Including, but not limited to, domestic tax settlement, foreign tax settlement, state and local tax settlement, and other tax settlements.

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