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v3.25.1

Employee Benefits (Details) $ in Millions | 3 Months Ended
--- | ---
Mar. 29, 2025 USD ($) plan | Mar. 30, 2024 USD ($)
Defined Contribution Plan Disclosure [Line Items] |  |
Defined contribution plan, number of plans | plan | 1 |
Masimo Retirement Savings Plan |  |
Defined Contribution Plan Disclosure [Line Items] |  |
Percent of employees' gross pay | 100.00% |
Percent of match | 3.00% |
Company's contribution to employee retirement savings plan | $ 1.0 | $ 1.1
Masimo Retirement Savings Plan | Foreign Plan |  |
Defined Contribution Plan Disclosure [Line Items] |  |
Company's contribution to employee retirement savings plan | $ 0.6 | $ 0.5

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- Definition Defined Contribution Plan, Number Of Plans + References No definition available. + Details
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Namespace Prefix: | masi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=us-gaap_ForeignPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |