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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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