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v3.25.4

Employee Benefits - Narrative (Details) $ in Millions | 12 Months Ended
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Jan. 03, 2026 USD ($) plan | Dec. 28, 2024 USD ($) | Dec. 30, 2023 USD ($)
Defined Contribution Plan Disclosure [Line Items] |  |  |
Defined contribution plan, number of plans | plan | 1 |  |
Higher benefits paid | $ (1.5) |  |
Higher employer contributions | 0.6 |  |
Foreign currency revaluation period decrease | 1.9 |  |
Lower actuarial gains | 0.6 |  |
Actuarial gain | 0.4 | $ (0.5) |
Unfunded balance | (5.5) | (5.4) |
Employer contributions | 2.4 | 1.8 |
Expected contributions for next fiscal year | $ 1.5 |  |
Masimo Retirement Savings Plan |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Percent of employees pay | 100.00% |  |
Percent of match | 3.00% |  |
Company's contribution to employee retirement savings plan | $ 3.7 | 3.9 | $ 4.1
Masimo Retirement Savings Plan | Foreign Plan |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Company's contribution to employee retirement savings plan | $ 2.3 | $ 2.4 | $ 2.1

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