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Financial instruments - Additional information (Details) SFr in Thousands, € in Millions		3 Months Ended		9 Months Ended
	Jun. 30, 2025 USD ($)	Sep. 28, 2025 USD ($)	Sep. 29, 2024 USD ($)	Sep. 28, 2025 USD ($)	Sep. 29, 2024 USD ($)	Aug. 18, 2025 USD ($) agreement counterparty	Aug. 18, 2025 CHF (SFr) agreement counterparty	Feb. 28, 2025 EUR (€)	Dec. 31, 2024 USD ($)	Apr. 25, 2024 USD ($) counterparty agreement	Apr. 25, 2024 EUR (€) counterparty agreement	Dec. 31, 2023 USD ($) counterparty	Dec. 31, 2023 EUR (€) counterparty
Derivatives Fair Value [Line Items]
Net proceeds on swaps designated as net investment hedges				$ 7,612,000	$ 18,262,000
Allowance for credit losses		$ 8,500,000		8,500,000					$ 10,000,000
Allowance for credit losses, current		4,100,000		4,100,000					6,100,000
Vascular Intervention Business
Derivatives Fair Value [Line Items]
Net proceeds on swaps designated as net investment hedges	$ 82,200,000
Cash flow hedging
Derivatives Fair Value [Line Items]
Ineffectiveness related to derivatives		0	$ 0	0	0
Foreign exchange contract | Not designated as hedging instrument
Derivatives Fair Value [Line Items]
Total notional amount for all open foreign currency forward contracts		282,700,000		282,700,000				€ 700.0	168,600,000
Gains (losses) on derivatives		700,000	$ (900,000)	$ 87,100,000	$ 2,600,000
Derivative, term of contract				12 months
Foreign exchange contract | Designated as hedging instrument | Cash flow hedging
Derivatives Fair Value [Line Items]
Total notional amount for all open foreign currency forward contracts		$ 319,900,000		$ 319,900,000					$ 270,900,000
Cross-currency interest rate swaps | Designated as hedging instrument
Derivatives Fair Value [Line Items]
Total notional amount for all open foreign currency forward contracts												$ 500,000,000
Number of new agreements | agreement						2	2			2	2
Derivative, number of counterparties | counterparty												6	6
Cross-currency interest rate swaps | Designated as hedging instrument | Short
Derivatives Fair Value [Line Items]
Total notional amount for all open foreign currency forward contracts												$ 500,000,000
Derivative, fixed interest rate												4.63%	4.63%
Cross-currency interest rate swaps | Designated as hedging instrument | Long
Derivatives Fair Value [Line Items]
Total notional amount for all open foreign currency forward contracts | €													€ 474.7
Derivative, fixed interest rate												3.05%	3.05%
Cross Currency Interest Rate Contract, Expiring 2030 | Designated as hedging instrument
Derivatives Fair Value [Line Items]
Derivative, number of counterparties | counterparty						6	6
Derivative, fixed interest rate						3.15%	3.15%
Cross Currency Interest Rate Contract, Expiring 2030 | Designated as hedging instrument | Short
Derivatives Fair Value [Line Items]
Total notional amount for all open foreign currency forward contracts						$ 300,000,000
Cross Currency Interest Rate Contract, Expiring 2030 | Designated as hedging instrument | Long
Derivatives Fair Value [Line Items]
Total notional amount for all open foreign currency forward contracts | SFr							SFr 242,400
Cross Currency Interest Rate Contract, Expiring 2032 | Designated as hedging instrument
Derivatives Fair Value [Line Items]
Derivative, number of counterparties | counterparty						4	4
Derivative, fixed interest rate						3.02%	3.02%
Cross Currency Interest Rate Contract, Expiring 2032 | Designated as hedging instrument | Short
Derivatives Fair Value [Line Items]
Total notional amount for all open foreign currency forward contracts						$ 300,000,000
Cross Currency Interest Rate Contract, Expiring 2032 | Designated as hedging instrument | Long
Derivatives Fair Value [Line Items]
Total notional amount for all open foreign currency forward contracts | SFr							SFr 242,500
Cross Currency Interest Rate Contract, Expiring 2027 | Designated as hedging instrument
Derivatives Fair Value [Line Items]
Derivative, number of counterparties | counterparty										5	5
Cross Currency Interest Rate Contract, Expiring 2027 | Designated as hedging instrument | Short
Derivatives Fair Value [Line Items]
Total notional amount for all open foreign currency forward contracts										$ 250,000,000
Derivative, fixed interest rate										4.25%	4.25%
Cross Currency Interest Rate Contract, Expiring 2027 | Designated as hedging instrument | Long
Derivatives Fair Value [Line Items]
Total notional amount for all open foreign currency forward contracts | €											€ 233.4
Derivative, fixed interest rate										2.44%	2.44%
Cross Currency Interest Rate Contract, Expiring 2029 | Designated as hedging instrument
Derivatives Fair Value [Line Items]
Derivative, number of counterparties | counterparty										4	4
Cross Currency Interest Rate Contract, Expiring 2029 | Designated as hedging instrument | Short
Derivatives Fair Value [Line Items]
Total notional amount for all open foreign currency forward contracts										$ 250,000,000
Derivative, fixed interest rate										4.25%	4.25%
Cross Currency Interest Rate Contract, Expiring 2029 | Designated as hedging instrument | Long
Derivatives Fair Value [Line Items]
Total notional amount for all open foreign currency forward contracts | €											€ 233.4
Derivative, fixed interest rate										2.45%	2.45%

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