Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)		12 Months Ended
	Aug. 26, 2018	Sep. 29, 2024	Oct. 01, 2023	Oct. 02, 2022
Retained Earnings (Accumulated Deficit)		$ (7,343,800,000)	$ (7,255,800,000)
Goodwill impairments		0	0	$ 0
Accounts Receivable, after Allowance for Credit Loss [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current		21,200,000	23,800,000
Inventory Disclosure [Abstract]
Inventory Valuation Reserves		58,000,000.0	44,400,000
Asset Retirement Obligation [Abstract]
Capitalized Costs, Asset Retirement Costs		25,100,000	25,600,000
Asset Retirement Obligations, Noncurrent		119,200,000	110,300,000
Marketing and Advertising Expense [Abstract]
Advertising Expense		597,300,000	507,800,000	416,700,000
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Deferred Revenue	$ 7,000,000,000
Prepaid Royalty Economic Life	40 years
Deferred Revenue, Current		1,781,200,000	1,700,200,000
Deferred Revenue, Revenue Recognized		176,500,000	176,500,000	176,500,000
Operating Lease, Liability, Current		1,463,100,000	1,275,300,000
Accrued payroll and benefits		786,600,000	828,300,000
Margin Deposit Assets		12,400,000	20,600,000
Property, Plant and Equipment [Line Items]
Net disposition and impairment charges		94,000,000.0	91,100,000	66,600,000
Restructuring Costs			22,000,000	46,000,000
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset		230,900,000	77,100,000
Restructuring Charges [Member]
Property, Plant and Equipment [Line Items]
Net disposition and impairment charges				9,600,000
Store Operating Expense [Member]
Property, Plant and Equipment [Line Items]
Asset Impairment Charges		23,300,000	23,200,000	14,300,000
Revenue Recognition Period Stored Value Cards and Loyalty Program Breakage [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Deferred Revenue, Current		$ 1,600,000,000	1,500,000,000
Leasehold Improvements [Member]
Leases [Abstract]
Property, Plant and Equipment, Useful Life		10 years
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		10 years
Minimum [Member] | Building [Member]
Leases [Abstract]
Property, Plant and Equipment, Useful Life		30 years
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		30 years
Minimum [Member] | Equipment [Member]
Leases [Abstract]
Property, Plant and Equipment, Useful Life		2 years
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		2 years
Minimum [Member] | Capitalized Asset
Leases [Abstract]
Property, Plant and Equipment, Useful Life		2 years
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		2 years
Maximum [Member] | Building [Member]
Leases [Abstract]
Property, Plant and Equipment, Useful Life		40 years
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		40 years
Maximum [Member] | Equipment [Member]
Leases [Abstract]
Property, Plant and Equipment, Useful Life		15 years
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		15 years
Maximum [Member] | Capitalized Asset
Leases [Abstract]
Property, Plant and Equipment, Useful Life		8 years
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		8 years
Company-operated stores [Member] | Revenue Recognition Period Stored Value Cards and Loyalty Program Breakage [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Contract with Customer, Liability, Revenue Recognized		$ 187,600,000	196,100,000	196,000,000.0
Licensed stores [Member] | Revenue Recognition Period Stored Value Cards and Loyalty Program Breakage [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Contract with Customer, Liability, Revenue Recognized		20,000,000.0	18,900,000	$ 16,700,000
Nestle Global Coffee Alliance [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Deferred Revenue, Current		$ 177,000,000.0	$ 177,000,000