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Cover
 9 Months Ended
Oct. 01, 2022
shares
Document Information [Line Items]  
Document Type 10-Q
Document Quarterly Report true
Document Period End Date Oct. 01, 2022
Document Transition Report false
Entity File Number 001-33642
Entity Registrant Name MASIMO CORP
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 33-0368882
Entity Address, Address Line One 52 Discovery
Entity Address, City or Town Irvine,
Entity Address, State or Province CA
Entity Address, Postal Zip Code 92618
City Area Code (949)
Local Phone Number 297-7000
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Large Accelerated Filer
Smaller Reporting Company false
Emerging Growth Company false
Entity Shell Company false
Entity Common Stock, Shares Outstanding 52,564,663
Amendment Flag false
Document Fiscal Year Focus 2022
Document Fiscal Period Focus Q3
Entity Central Index Key 0000937556
Current Fiscal Year End Date --12-31
Common Stock  
Document Information [Line Items]  
Title of 12(b) Security Common Stock, $0.001 par value
Trading Symbol MASI
Security Exchange Name NASDAQ
Rights to Purchase Series A Junior Participating Preferred Stock  
Document Information [Line Items]  
Title of 12(b) Security Rights to Purchase Series A Junior Participating Preferred Stock
Trading Symbol N/A
Security Exchange Name NASDAQ