Income Taxes (Tax Effect of Temporary Differences and Carryforwards That Comprise Significant Portions of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Sep. 27, 2020	Sep. 29, 2019
Tax Credit Carryforward [Line Items]
Operating lease liability	$ 2,313.0	$ 0.0
Stored value card liability	1,678.6	1,649.0
Intangible assets and goodwill	248.6	230.0
Accrued occupancy costs	0.0	121.6
Other	554.4	413.0
Total	4,794.6	2,413.6
Valuation allowance	(239.4)	(75.1)
Total deferred tax asset, net of valuation allowance	4,555.2	2,338.5
Operating lease, right-of-use assets	(2,191.8)	0.0
Property, plant and equipment	(463.3)	(400.9)
Intangible assets and goodwill	(145.1)	(209.9)
Other	(123.2)	(148.3)
Total	(2,923.4)	(759.1)
Deferred income tax assets	1,789.9	1,765.8
Deferred income tax liabilities	(158.1)	(186.4)
Deferred Tax Assets, Net	1,631.8	$ 1,579.4
expirationindefinite [Member]
Tax Credit Carryforward [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	75.2
Foreign net operating loss carryforwards	150.5
expirationbeginningfiscal2024 [Member]
Tax Credit Carryforward [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	112.8
Tax credit carryforward	2.7
expiration beginning fiscal 2029 [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward	11.9
expirationbeginningfiscal2021 [Member] [Domain]
Tax Credit Carryforward [Line Items]
Foreign net operating loss carryforwards	$ 317.8