Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 25, 2022	Dec. 26, 2021	Dec. 27, 2020
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Loss and credit carryforwards	$ 461.9	$ 175.3
Increase of operating loss carryforwards	286.6
Deferred tax assets, valuation allowance	432.0	189.8
Increase of valuation allowance, deferred tax asset	242.2
Additional foreign tax withholding amount	3.2
Unrecognized tax benefits	39.9	77.8	$ 50.6	$ 67.8
Unrecognized tax benefits that would impact effective tax rate	46.0	53.0	46.0
Income taxes recognized potential interest and penalties	5.8	2.2	2.6
Unrecognized tax benefits, income tax penalties and interest accrued	6.2	$ 8.8	$ 7.3
Foreign Tax Authority | 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 Authority | Capital Loss Carryforward
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Tax credit carryforward, amount	375.6
Tax credit carryforward, valuation allowance	364.8
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	$ 4.0