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Commitments and Contingencies (Detail) $ in Millions			1 Months Ended		3 Months Ended		6 Months Ended
Commitments and Contingencies (Detail) $ in Millions	Jan. 30, 2023 patent	Oct. 13, 2020 patent	Feb. 28, 2023 patent	Jul. 31, 2017	Jun. 29, 2024 USD ($) executiveOfficer distributor customer	Jul. 01, 2023 distributor	Jun. 29, 2024 USD ($) executiveOfficer customer distributor	Jul. 01, 2023 distributor	Apr. 12, 2024 USD ($) agreement	Dec. 30, 2023 customer	Oct. 20, 2022 complaint
Contingencies And Commitments [Line Items]
Severance plan participation agreements \| executiveOfficer					6		6
Required notice of resignation							6 months
Royalty obligation					$ 5.0		$ 5.0
License fee					2.5		2.5
Change in control					15.0		15.0
Royalty guarantees, commitments, additional, change in control					2.0		2.0
Remaining commitment					271.7		271.7
Other commitment					5.0		5.0
Number of endorsement agreements \| agreement									2
Principal amount of endorsement agreement									$ 11.5
Endorsement agreement minimum guaranteed royalty payment							0.5
Endorsement agreement outstanding obligation					9.3		9.3
Bank balances					129.6		129.6
Bank balance covered by federal deposit insurance corporation limit					$ 9.1		$ 9.1
Minimum
Contingencies And Commitments [Line Items]
Endorsement agreement term (in months)									18 months
Maximum
Contingencies And Commitments [Line Items]
Endorsement agreement term (in months)									36 months
Masimo Vs. Apple Inc
Contingencies And Commitments [Line Items]
Number of patents found infringed \| patent	1		2
Masimo Vs. Apple Inc \| Pending Litigation
Contingencies And Commitments [Line Items]
Asserted patents found valid \| patent		3
Asserted patents found invalid \| patent		9
Apple, Inc. Patent Infringement \| Pending Litigation
Contingencies And Commitments [Line Items]
Number of complaints \| complaint											2
Revenue Benchmark
Contingencies And Commitments [Line Items]
Distributors \| distributor					1	1	1	1
Accounts Receivable
Contingencies And Commitments [Line Items]
Concentration risk, AR balance one customer \| customer					1		1			1
GPO Members \| Revenue Benchmark \| Customer Concentration Risk
Contingencies And Commitments [Line Items]
Concentration risk, percentage					59.80%	58.50%	58.20%	54.10%
Just in time distributor one \| Revenue Benchmark \| Customer Concentration Risk
Contingencies And Commitments [Line Items]
Concentration risk, percentage					20.80%	12.00%	18.50%	10.30%
Customer One \| Accounts Receivable \| Customer Concentration Risk
Contingencies And Commitments [Line Items]
Percentage of accounts receivable balance					10.80%		10.80%			18.10%
Chief Executive Officer
Contingencies And Commitments [Line Items]
Severance payment period				3 years
Qualifying termination							$ 479.7
Chief Executive Officer \| Cash Distribution
Contingencies And Commitments [Line Items]
Severance terms				50.00%
Chief Executive Officer \| Restricted Stock Units (RSUs)
Contingencies And Commitments [Line Items]
Severance terms				50.00%