Debt Instrument, Covenant, Consolidated Leverage Ratio, Maximum

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- Definition

Debt Instrument, Debt Conversion Fee Equal To Principal Amount Outstanding, Percentage

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- Definition

Long-term Debt, Weighted Average Maturity, at Point in Time

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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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.

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Period between issuance and maturity of debt instrument, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Financing (Narrative) (Details) € in Millions, SFr in Millions						9 Months Ended
	Jun. 03, 2026 USD ($)	Jun. 03, 2026 CHF (SFr)	Apr. 23, 2026 USD ($)	Apr. 23, 2026 EUR (€)	Apr. 16, 2026 USD ($)	Sep. 25, 2026 USD ($)	Sep. 30, 2026 EUR (€)	Sep. 25, 2026 EUR (€)	Mar. 18, 2026 EUR (€)	Dec. 31, 2025 USD ($)	Dec. 31, 2025 EUR (€)
Debt Instrument [Line Items]
Debt discounts, premiums and debt issuance costs						$ 126,000,000				$ 93,000,000
Borrowings outstanding						24,388,000,000				18,416,000,000
Borrowings outstanding						26,482,000,000				18,418,000,000
Multi-year Credit Facility \| Revolving credit facility \| Line of credit
Debt Instrument [Line Items]
Line of credit facility						5,000,000,000.0
Borrowings outstanding						0
Euro-denominated commercial paper
Debt Instrument [Line Items]
Borrowings outstanding						$ 4,700,000,000
Euro-denominated commercial paper \| Commercial paper
Debt Instrument [Line Items]
Weighted average interest rate of long-term debt, interest rate						2.80%		2.80%
Weighted average maturity of long-term debt, at point in time						76 days
Borrowings outstanding						$ 4,708,000,000		€ 4,100		1,097,000,000	€ 933
U.S. dollar-denominated commercial paper \| Commercial paper
Debt Instrument [Line Items]
Borrowings outstanding						0
364-Day Facility \| Revolving credit facility
Debt Instrument [Line Items]
Line of credit facility					$ 5,000,000,000.0
Borrowings outstanding						0
Debt term					364 days
Debt conversion fee equal to amount of principal outstanding, percentage					0.50%
Commitment fee percentage					0.04%
Consolidated Leverage Ratio to be maintained					0.65
364-Day Facility \| Revolving credit facility \| Debt Rate, Condition Two
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					1.00%
364-Day Facility \| Revolving credit facility \| Fed funds rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					0.05%
364-Day Facility \| Revolving credit facility \| Secured Overnight Financing Rate (SOFR) \| Debt Rate, Condition One
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					1.00%
364-Day Facility \| Revolving credit facility \| Minimum \| Debt Rate, Condition Two
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					0.00%
364-Day Facility \| Revolving credit facility \| Minimum \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					0.585%
364-Day Facility \| Revolving credit facility \| Maximum \| Debt Rate, Condition Two
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					0.085%
364-Day Facility \| Revolving credit facility \| Maximum \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					1.085%
2026 Biopharma Euronotes \| Senior notes
Debt Instrument [Line Items]
Borrowings outstanding						0				1,469,000,000
Aggregate principal amount \| €								1,300	€ 1,300		1,300
Total Masimo Financing Euronotes \| Senior notes
Debt Instrument [Line Items]
Aggregate principal amount \| €				€ 3,000
Proceeds from debt, net of issuance costs			$ 3,500,000,000	€ 3,000
Total Masimo Financing CHF Notes \| Senior notes
Debt Instrument [Line Items]
Aggregate principal amount \| SFr		SFr 2,383
Total Masimo Financing CHF Notes \| Bonds
Debt Instrument [Line Items]
Proceeds from debt, net of issuance costs	$ 3,000,000,000.0	SFr 2,400
2.1% senior unsecured notes due 9/30/2026 (€800 million) (the “2026 Euronotes”) (c) \| Senior notes
Debt Instrument [Line Items]
Borrowings outstanding						$ 912,000,000				$ 940,000,000
Aggregate principal amount \| €								€ 800			€ 800
2.1% senior unsecured notes due 9/30/2026 (€800 million) (the “2026 Euronotes”) (c) \| Senior notes \| Subsequent Event
Debt Instrument [Line Items]
Aggregate principal amount \| €							€ 800