Restructuring and Related Activities (Narrative) (Details) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 29, 2026 USD ($) store	Mar. 30, 2025 USD ($)	Mar. 29, 2026 USD ($) store	Mar. 30, 2025 USD ($)	Sep. 27, 2026 USD ($)
Restructuring Charges [Abstract]
Restructuring and impairments	$ 25.1	$ 116.2	$ 113.2	$ 116.2
Restructuring Cost and Reserve [Line Items]
Disposal and impairment of store assets	14.3		39.1
Employee severance, separation and other costs	7.8		22.2
Amortization of ROU lease assets and other lease exit costs	3.0		51.9
Restructuring and impairments	$ 25.1	116.2	$ 113.2	116.2
Restructuring store closures \| store	62		227
Forecast
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost					$ 150.0
Operating Segments \| North America
Restructuring Charges [Abstract]
Restructuring and impairments	$ 5.3	21.3	$ 45.3	21.3
Restructuring Cost and Reserve [Line Items]
Disposal and impairment of store assets	14.2		39.0
Employee severance, separation and other costs	(6.4)		1.6
Amortization of ROU lease assets and other lease exit costs	(2.5)		4.7
Restructuring and impairments	5.3	21.3	45.3	21.3
Operating Segments \| International
Restructuring Charges [Abstract]
Restructuring and impairments	8.8	16.8	52.4	16.8
Restructuring Cost and Reserve [Line Items]
Disposal and impairment of store assets	0.1		0.1
Employee severance, separation and other costs	3.2		5.1
Amortization of ROU lease assets and other lease exit costs	5.5		47.2
Restructuring and impairments	8.8	16.8	52.4	16.8
Operating Segments \| Channel Development
Restructuring Charges [Abstract]
Restructuring and impairments	(0.1)	0.9	0.1	0.9
Restructuring Cost and Reserve [Line Items]
Disposal and impairment of store assets	0.0		0.0
Employee severance, separation and other costs	(0.1)		0.1
Amortization of ROU lease assets and other lease exit costs	0.0		0.0
Restructuring and impairments	(0.1)	0.9	0.1	0.9
Operating Segments \| Corporate and Other
Restructuring Charges [Abstract]
Restructuring and impairments	11.1	77.2	15.4	77.2
Restructuring Cost and Reserve [Line Items]
Disposal and impairment of store assets	0.0		0.0
Employee severance, separation and other costs	11.1		15.4
Amortization of ROU lease assets and other lease exit costs	0.0		0.0
Restructuring and impairments	$ 11.1	$ 77.2	$ 15.4	$ 77.2