Supplemental Consolidated Financial Statement Information (Schedule of Supplemental Consolidated Balance Sheet Information) (Details) - USD ($) $ in Thousands	Sep. 27, 2020	Sep. 30, 2019	Sep. 29, 2019
Supplemental Consolidated Financial Statement Information [Abstract]
Trade	$ 77,082		$ 36,907
Notes receivable	1,193		278
Income tax receivable	1,591		160
Other	4,092		10,855
Allowance for doubtful accounts	(5,541)		(2,965)
Accounts and other receivables, net	78,417		45,235
Company-owned life insurance policies	113,767		112,753
Deferred rent receivable	48,604		49,333
Franchise tenant improvement allowances	29,437		26,925
Other	18,815		17,674
Other Assets, Miscellaneous, Noncurrent	210,623		206,685
Insurance	25,310		27,888
Payroll and related taxes	34,475		31,095
Sales and property taxes	22,038		4,268
Gift card liability	2,195		2,036
Deferred franchise fees	4,934		4,978
Other	40,479		49,818
Accrued liabilities	129,431	$ 115,381	120,083
Defined benefit pension plans	120,811		120,260
Deferred franchise fees	38,607		41,295
Straight-line rent accrual			29,537
Other	47,076		72,678
Other long-term liabilities	$ 206,494	$ 221,887	$ 263,770