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Restructuring - Schedule of Restructuring (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
	Sep. 29, 2025	Dec. 28, 2025	Sep. 29, 2025	Dec. 29, 2024	Dec. 28, 2025	Dec. 29, 2024
2025 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			$ 30.7		$ 30.7
Charges					3.1
Usage					(21.1)
Restructuring reserve, ending balance		$ 12.7			12.7
2026 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			0.0		0.0
Charges					8.0
Usage					(3.1)
Restructuring reserve, ending balance		4.9			4.9
Employee severance and benefit costs \| 2025 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			25.2		25.2
Charges	$ 0.0	0.6	0.1	$ 15.0	0.8	$ 51.5
Usage					(17.8)
Restructuring reserve, ending balance		8.2			8.2
Employee severance and benefit costs \| 2026 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			0.0		0.0
Charges		8.0			8.0
Usage					(3.1)
Restructuring reserve, ending balance		4.9			4.9
Contract termination liability \| 2025 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			5.5		5.5
Charges	$ 0.0	0.0	$ 2.3	$ 0.0	2.3	$ 0.0
Usage					(3.3)
Restructuring reserve, ending balance		$ 4.5			$ 4.5