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Income Taxes - Reconciliation of Income Tax Computed at Federal Statutory Rate (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 29, 2024
Dec. 31, 2023
Jan. 01, 2023
Income Tax Disclosure [Abstract]      
Tax (benefit) expense at statutory tax rate $ (447.6) $ (6.1) $ 154.5
State tax (benefit) expense, net of federal tax (7.2) (2.8) 29.3
Foreign income taxed at rates other than the applicable U.S. rate 10.3 (23.0) (27.5)
Goodwill Impairment 316.2 0.0 0.0
Permanent differences 14.8 (4.3) 8.2
Federal and state research credits—current year (5.1) (10.3) (7.3)
Stock-based compensation 6.2 1.5 1.5
Change in valuation allowance 31.3 10.4 26.2
Foreign Derived Intangible Income Deduction 0.0 0.0 (10.2)
Global Intangible Low-Taxed Income 0.1 20.1 3.8
Change in uncertain tax positions (7.8) (11.8) 0.0
Other 9.3 7.3 8.7
(Benefit from) provision for income taxes $ (79.5) $ (19.0) $ 187.2