Derivative, Number of Counterparties

No definition available.

Name:	tfx_DerivativeNumberOfCounterparties
Namespace Prefix:	tfx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Derivative, Number Of New Agreements

+ References

No definition available.

+ Details

Name:	tfx_DerivativeNumberOfNewAgreements
Namespace Prefix:	tfx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of allowance for credit loss on accounts receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-4

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_AllowanceForDoubtfulAccountsReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of allowance for credit loss on accounts receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-4

+ Details

Name:	us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of gain (loss) from excluded component of derivative hedge, recognized in earnings. Excludes recognition under systematic and rational method.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4C
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Subparagraph (b)
-SubTopic 20
-Topic 815
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480627/815-20-45-1A

+ Details

Name:	us-gaap_DerivativeExcludedComponentGainLossRecognizedInEarnings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

+ Details

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativesFairValueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

+ Details

Name:	us-gaap_GainLossOnDerivativeInstrumentsNetPretax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CrossCurrencyInterestRateContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PositionAxis=us-gaap_ShortMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PositionAxis=us-gaap_LongMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=tfx_CrossCurrencyInterestRateContractExpiring2027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=tfx_CrossCurrencyInterestRateContractExpiring2029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Financial instruments - Additional information (Details) € in Millions	3 Months Ended
	Mar. 30, 2025 USD ($)	Mar. 31, 2024 USD ($)	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]
Allowance for credit losses	$ 8,200,000		$ 10,000,000
Allowance for credit losses, current	4,000,000		6,100,000
Cash flow hedging
Derivatives Fair Value [Line Items]
Ineffectiveness related to derivatives	0	$ 0
Foreign exchange contract \| Not designated as hedging instrument
Derivatives Fair Value [Line Items]
Gains (losses) on derivatives	22,600,000	$ 3,600,000
Total notional amount for all open foreign currency forward contracts	$ 910,700,000		168,600,000
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	$ 312,500,000		$ 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
Derivative, number of counterparties \| counterparty						6	6
Number of new agreements \| agreement				2	2
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 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%