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Fair Value Measurement - Summary of Fair Value of Financial Liabilities Measured Using Level 3 Inputs (Parenthetical) (Detail) - USD ($) $ in Millions | Sep. 29, 2023 | Jan. 01, 2022
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Nove tide Acquisition [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Business acquisition, Percentage of voting interests acquired |  | 100.00%
Subordinated Convertible Bonds [Member] | Alvotech [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt instrument face amount | $ 40 |

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