Basis Of Presentation - Adoption for Topic 606 Revenue Recognition (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Apr. 14, 2019	Apr. 15, 2018	Apr. 14, 2019	Apr. 15, 2018	Jan. 20, 2019	Sep. 30, 2018	Jan. 21, 2018	Oct. 01, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		$ 215,727	$ 209,772	$ 506,513	$ 504,235
Selling, General and Administrative Expense		17,585	26,594	41,668	60,655
Total operating costs and expenses, net		168,604	162,529	401,066	383,621
Earnings from operations		47,123	47,243	105,447	120,614
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		33,504	36,407	73,998	96,434
Income taxes	[1]	8,374	11,426	17,747	58,564
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		25,130	24,981	56,251	37,870
Net earnings		25,089	47,605	59,187	59,795
Prepaid expenses		13,464		13,464			$ 14,443
Total current assets		105,336		105,336			94,973
Deferred tax assets		73,567		73,567			62,140
Other Assets, Noncurrent		207,388		207,388			199,266
Assets, Noncurrent		328,188		328,188			308,755
Assets		832,127		832,127			823,397
Accrued Liabilities, Current		114,393		114,393			106,922
Liabilities, Current		182,128		182,128			183,720
Other long-term liabilities		227,649		227,649			193,449
Liabilities, Noncurrent		1,242,513		1,242,513			1,231,376
Retained Earnings (Accumulated Deficit)		1,562,475		1,562,475			1,561,353
Stockholders' Equity Attributable to Parent		(592,514)	(430,910)	(592,514)	(430,910)	$ (607,296)	(591,699)	$ (374,560)	$ (388,130)
Liabilities and Equity		832,127		832,127			$ 823,397
Royalty and Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		38,410	37,991	90,660	85,600
Franchise contributions for advertising and other services [Domain]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		38,989	0	90,803	0
Franchise [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Franchise advertising and other services expenses		40,245	$ 0	94,515	$ 0
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		175,766		413,645
Franchise advertising and other services expenses		0		0
Selling, General and Administrative Expense		18,841		45,380
Total operating costs and expenses, net		129,615		310,263
Earnings from operations		46,151		103,382
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		32,532		71,933
Income taxes		8,124		17,215
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		24,408		54,718
Net earnings		24,367		57,654
Prepaid expenses		13,996		13,996
Total current assets		105,868		105,868
Deferred tax assets		60,609		60,609
Other Assets, Noncurrent		207,657		207,657
Assets, Noncurrent		315,499		315,499
Assets		819,970		819,970
Accrued Liabilities, Current		109,429		109,429
Liabilities, Current		177,164		177,164
Other long-term liabilities		184,660		184,660
Liabilities, Noncurrent		1,199,524		1,199,524
Retained Earnings (Accumulated Deficit)		1,598,271		1,598,271
Stockholders' Equity Attributable to Parent		(556,718)		(556,718)
Liabilities and Equity		819,970		819,970
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Royalty and Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		37,438		88,595
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Franchise contributions for advertising and other services [Domain]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		0		0
Franchise Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		(972)		(2,065)
Franchise advertising and other services expenses		0		0
Selling, General and Administrative Expense		0		0
Total operating costs and expenses, net		0		0
Earnings from operations		(972)		(2,065)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		(972)		(2,065)
Income taxes		(250)		(532)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		(722)		(1,533)
Net earnings		(722)		(1,533)
Prepaid expenses		532		532
Total current assets		532		532
Deferred tax assets		(12,958)		(12,958)
Other Assets, Noncurrent		269		269
Assets, Noncurrent		(12,689)		(12,689)
Assets		(12,157)		(12,157)
Contract with Customer, Liability, Current		(4,964)		(4,964)
Liabilities, Current		(4,964)		(4,964)
Other long-term liabilities		(42,989)		(42,989)
Liabilities, Noncurrent		(42,989)		(42,989)
Retained Earnings (Accumulated Deficit)		35,796		35,796
Stockholders' Equity Attributable to Parent		35,796		35,796
Liabilities and Equity		(12,157)		(12,157)
Franchise Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Royalty and Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		(972)		(2,065)
Franchise Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Franchise contributions for advertising and other services [Domain]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		0		0
Marketing And Sourcing Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		(36,956)		(86,053)
Franchise advertising and other services expenses		(36,956)		(86,053)
Selling, General and Administrative Expense		0		0
Total operating costs and expenses, net		(36,956)		(86,053)
Earnings from operations		0		0
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		0		0
Income taxes		0		0
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		0		0
Net earnings		0		0
Prepaid expenses		0		0
Total current assets		0		0
Deferred tax assets		0		0
Other Assets, Noncurrent		0		0
Assets, Noncurrent		0		0
Assets		0		0
Accrued Liabilities, Current		0		0
Liabilities, Current		0		0
Other long-term liabilities		0		0
Liabilities, Noncurrent		0		0
Retained Earnings (Accumulated Deficit)		0		0
Stockholders' Equity Attributable to Parent		0		0
Liabilities and Equity		0		0
Marketing And Sourcing Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Royalty and Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		0		0
Marketing And Sourcing Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Franchise contributions for advertising and other services [Domain]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		(36,956)		(86,053)
Technology And Support Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		(2,033)		(4,750)
Franchise advertising and other services expenses		(3,289)		(8,462)
Selling, General and Administrative Expense		1,256		3,712
Total operating costs and expenses, net		(2,033)		(4,750)
Earnings from operations		0		0
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		0		0
Income taxes		0		0
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		0		0
Net earnings		0		0
Prepaid expenses		0		0
Total current assets		0		0
Deferred tax assets		0		0
Other Assets, Noncurrent		0		0
Assets, Noncurrent		0		0
Assets		0		0
Accrued Liabilities, Current		0		0
Liabilities, Current		0		0
Other long-term liabilities		0		0
Liabilities, Noncurrent		0		0
Retained Earnings (Accumulated Deficit)		0		0
Stockholders' Equity Attributable to Parent		0		0
Liabilities and Equity		0		0
Technology And Support Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Royalty and Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		0		0
Technology And Support Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Franchise contributions for advertising and other services [Domain]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		$ (2,033)		$ (4,750)

[1] Percentages may not add due to rounding.