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Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 27, 2025	Sep. 28, 2024	Dec. 28, 2024
Fair value, assets and liabilities measured on a recurring basis
Equity securities without readily determinable fair value, amount	$ 56.0		$ 56.0		$ 45.0
Equity securities without readily determinable fair value, upward price adjustment, annual amount	1.3
Equity securities without readily determinable fair value, downward price adjustment, amount		$ 2.5	14.8	$ 19.7
Recurring
Fair value, assets and liabilities measured on a recurring basis
Noncurrent investments	5.3		5.3		8.4
Recurring \| Quoted Prices in Active Markets (Level 1)
Fair value, assets and liabilities measured on a recurring basis
Noncurrent investments	5.3		5.3		8.4
Recurring \| Cash and cash equivalents
Fair value, assets and liabilities measured on a recurring basis
Current investments	1.9		1.9		1.5
Recurring \| Other Current Assets
Fair value, assets and liabilities measured on a recurring basis
Current investments	$ 45.4		$ 45.4		$ 38.1