Revenue from Contract with Customer (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020	Sep. 27, 2020
Deferred Revenue Table [Line Items]
Deferred Revenue, Revenue Recognized	$ 44.2		$ 88.4
Stored value card liability and current portion of deferred revenue	1,622.1		1,622.1		$ 1,456.5
Revenue Recognition Period Stored Value Cards and Loyalty Program Breakage [Member]
Deferred Revenue Table [Line Items]
Deferred Revenue	1,750.0	$ 1,561.0	1,280.5	$ 1,113.7
Deferred Revenue, Additions	2,709.7	2,453.6	6,147.1	5,961.1
Deferred Revenue, Revenue Recognized	(2,977.8)	(2,736.4)	(5,958.0)	(5,798.3)
Deferred Revenue, Other	(6.7)	(5.1)	5.6	(3.4)
Deferred Revenue	1,475.2	1,273.1	1,475.2	1,273.1
Stored value card liability and current portion of deferred revenue	$ 1,370.4	$ 1,191.5	$ 1,370.4	$ 1,191.5

Amount of increase (decrease) in deferred revenue for other items.

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- Definition

Deferred Revenue Table [Line Items]

+ References

No definition available.

+ Details

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- Definition

Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(5))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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- Definition

Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an Entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

+ References

No definition available.

+ Details

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- Definition

Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as current.

+ References

+ Details

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- Definition

Amount of revenue recognized that was previously reported as deferred or unearned revenue.

+ References

No definition available.

+ Details

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