Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Dec. 25, 2022	Dec. 26, 2021
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Loss and credit carryforwards	$ 426.6	$ 461.9
Decrease of operating loss carryforwards	35.3
Deferred tax assets, valuation allowance	412.5	432.0
Decrease of valuation allowance, deferred tax asset	19.5
Additional foreign tax withholding amount	4.6
Unrecognized tax benefits	36.1	39.9	$ 77.8	$ 50.6
Unrecognized tax benefits that would impact effective tax rate	44.0	46.0	53.0
Income taxes recognized potential interest and penalties	2.9	5.8	2.2
Unrecognized tax benefits, income tax penalties and interest accrued	7.7	$ 6.2	$ 8.8
Minimum
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Decrease in unrecognized tax benefits is reasonably possible	0.0
Maximum
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Decrease in unrecognized tax benefits is reasonably possible	2.0
Foreign Tax Jurisdiction | Swiss Federal Tax Administration (FTA)
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Deferred tax asset related to tax intangibles	135.6
Domestic Tax Jurisdiction | Capital Loss Carryforward
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Tax credit carryforward, amount	$ 337.6