Restructuring and Related Activities (Narrative) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 28, 2026 USD ($) store	Jun. 29, 2025 USD ($)	Jun. 28, 2026 USD ($) store	Jun. 29, 2025 USD ($)	Sep. 27, 2026 USD ($)
Restructuring Charges [Abstract]
Restructuring and impairments	$ 302.6	$ 20.8	$ 415.8	$ 137.0
Restructuring Cost and Reserve [Line Items]
Amortization of ROU lease assets and other lease exit costs	112.9		164.8
Restructuring and impairments	$ 302.6	20.8	$ 415.8	137.0
Restructuring store closures \| store	20		247
Fiscal year 2025
Restructuring Charges [Abstract]
Restructuring and impairments	$ 10.0	20.8	$ 115.9	137.0
Restructuring Cost and Reserve [Line Items]
Disposal and impairment of store assets	4.3		43.4
Employee severance, separation and other costs	5.6		20.5
Amortization of ROU lease assets and other lease exit costs	0.1		52.0
Restructuring and impairments	10.0	20.8	115.9	137.0
Fiscal year 2026
Restructuring Charges [Abstract]
Restructuring and impairments	292.6		299.9
Restructuring Cost and Reserve [Line Items]
Disposal and impairment of store assets	217.4		217.4
Employee severance, separation and other costs	72.6		79.9
Amortization of ROU lease assets and other lease exit costs	2.6		2.6
Restructuring and impairments	292.6		299.9
Forecast \| Fiscal year 2025
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost					$ 120.0
Forecast \| Fiscal year 2026
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost					$ 110.0
Operating Segments \| North America
Restructuring Charges [Abstract]
Restructuring and impairments	174.3	3.1	219.6	24.5
Restructuring Cost and Reserve [Line Items]
Restructuring and impairments	174.3	3.1	219.6	24.5
Operating Segments \| North America \| Fiscal year 2025
Restructuring Charges [Abstract]
Restructuring and impairments	6.4		51.7
Restructuring Cost and Reserve [Line Items]
Disposal and impairment of store assets	4.9		43.9
Employee severance, separation and other costs	3.3		4.9
Amortization of ROU lease assets and other lease exit costs	(1.8)		2.9
Restructuring and impairments	6.4		51.7
Operating Segments \| North America \| Fiscal year 2026
Restructuring Charges [Abstract]
Restructuring and impairments	167.9		167.9
Restructuring Cost and Reserve [Line Items]
Disposal and impairment of store assets	154.7		154.7
Employee severance, separation and other costs	10.7		10.7
Amortization of ROU lease assets and other lease exit costs	2.5		2.5
Restructuring and impairments	167.9		167.9
Operating Segments \| International
Restructuring Charges [Abstract]
Restructuring and impairments	41.1	3.1	93.4	19.9
Restructuring Cost and Reserve [Line Items]
Restructuring and impairments	41.1	3.1	93.4	19.9
Operating Segments \| International \| Fiscal year 2025
Restructuring Charges [Abstract]
Restructuring and impairments	2.3		54.6
Restructuring Cost and Reserve [Line Items]
Disposal and impairment of store assets	(0.6)		(0.5)
Employee severance, separation and other costs	1.0		6.0
Amortization of ROU lease assets and other lease exit costs	1.9		49.1
Restructuring and impairments	2.3		54.6
Operating Segments \| International \| Fiscal year 2026
Restructuring Charges [Abstract]
Restructuring and impairments	38.8		38.8
Restructuring Cost and Reserve [Line Items]
Disposal and impairment of store assets	14.3		14.3
Employee severance, separation and other costs	24.5		24.5
Amortization of ROU lease assets and other lease exit costs	0.0		0.0
Restructuring and impairments	38.8		38.8
Operating Segments \| Channel Development
Restructuring Charges [Abstract]
Restructuring and impairments	(0.2)	0.2	0.0	1.1
Restructuring Cost and Reserve [Line Items]
Restructuring and impairments	(0.2)	0.2	0.0	1.1
Operating Segments \| Channel Development \| Fiscal year 2025
Restructuring Charges [Abstract]
Restructuring and impairments	(0.2)		0.0
Restructuring Cost and Reserve [Line Items]
Disposal and impairment of store assets	0.0		0.0
Employee severance, separation and other costs	(0.2)		0.0
Amortization of ROU lease assets and other lease exit costs	0.0		0.0
Restructuring and impairments	(0.2)		0.0
Operating Segments \| Channel Development \| Fiscal year 2026
Restructuring Charges [Abstract]
Restructuring and impairments	0.0		0.0
Restructuring Cost and Reserve [Line Items]
Disposal and impairment of store assets	0.0		0.0
Employee severance, separation and other costs	0.0		0.0
Amortization of ROU lease assets and other lease exit costs	0.0		0.0
Restructuring and impairments	0.0		0.0
Operating Segments \| Corporate and Other
Restructuring Charges [Abstract]
Restructuring and impairments	87.4	14.4	102.8	91.5
Restructuring Cost and Reserve [Line Items]
Restructuring and impairments	87.4	$ 14.4	102.8	$ 91.5
Operating Segments \| Corporate and Other \| Fiscal year 2025
Restructuring Charges [Abstract]
Restructuring and impairments	1.5		9.6
Restructuring Cost and Reserve [Line Items]
Disposal and impairment of store assets	0.0		0.0
Employee severance, separation and other costs	1.5		9.6
Amortization of ROU lease assets and other lease exit costs	0.0		0.0
Restructuring and impairments	1.5		9.6
Operating Segments \| Corporate and Other \| Fiscal year 2026
Restructuring Charges [Abstract]
Restructuring and impairments	85.9		93.2
Restructuring Cost and Reserve [Line Items]
Disposal and impairment of store assets	48.4		48.4
Employee severance, separation and other costs	37.4		44.7
Amortization of ROU lease assets and other lease exit costs	0.1		0.1
Restructuring and impairments	$ 85.9		$ 93.2