Fair Value Measurements - Fair Value of Debt (Details) - Convertible Notes - USD ($) $ in Millions	Sep. 27, 2025	Aug. 20, 2025	Jun. 28, 2025	Mar. 06, 2023
Debt details
Long-term Debt	$ 805.2		$ 625.6
0.625% Senior Convertible Notes
Debt details
Stated interest rate	0.625%	0.625%
Long-term Debt	$ 269.4		0.0
3.75% Senior Notes
Debt details
Stated interest rate	3.75%
Long-term Debt	$ 377.2		373.6
1.625% Senior Convertible Notes
Debt details
Stated interest rate	1.625%	1.625%		1.625%
Long-term Debt	$ 158.6		252.0
Level 1
Debt details
Long-term Debt	0.0		0.0
Level 1 \| 0.625% Senior Convertible Notes
Debt details
Long-term Debt	0.0		0.0
Level 1 \| 3.75% Senior Notes
Debt details
Long-term Debt	0.0		0.0
Level 1 \| 1.625% Senior Convertible Notes
Debt details
Long-term Debt	0.0		0.0
Level 2
Debt details
Long-term Debt	805.2		625.6
Level 2 \| 0.625% Senior Convertible Notes
Debt details
Long-term Debt	269.4		0.0
Level 2 \| 3.75% Senior Notes
Debt details
Long-term Debt	377.2		373.6
Level 2 \| 1.625% Senior Convertible Notes
Debt details
Long-term Debt	158.6		252.0
Level 3
Debt details
Long-term Debt	0.0		0.0
Level 3 \| 0.625% Senior Convertible Notes
Debt details
Long-term Debt	0.0		0.0
Level 3 \| 3.75% Senior Notes
Debt details
Long-term Debt	0.0		0.0
Level 3 \| 1.625% Senior Convertible Notes
Debt details
Long-term Debt	$ 0.0		$ 0.0

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