Supplemental Consolidated Cash Flow Information (Additional Information Related to Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 30, 2018
Supplemental Cash Flow Information [Abstract]
Income tax payments	$ 29,360	$ 14,906	$ 56,183
Interest, net of amounts capitalized	68,612	46,227	43,692
Increase in notes receivable from the sale of company-operated restaurants	0	0	70,461
Increase in dividends accrued or converted to common stock equivalents	117	247	276
Decrease in equipment capital lease obligations from the sale of company-operated restaurants, closure of stores, and termination of equipment leases	0	0	3,617
Decrease in finance lease obligations from the termination of building leases	24	41	271
Equipment finance lease obligations incurrd	132
Equipment finance lease obligations incurred		20	98
Consideration for franchise acquisitions	859	0	0
(Decrease) increase in obligations for purchases of property and equipment	(2,696)	(2,117)	822
(Decrease) increase in obligations for treasury stock repurchases	$ (2,025)	$ (12,337)	$ 14,362