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Borrowings - Interest Expense Amounts Related to Convertible Notes (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Debt Disclosure [Abstract] |  |  |
Interest cost related to contractual interest coupon | $ 15.5 us-gaap_InterestOnConvertibleDebtNetOfTax | $ 15.5 us-gaap_InterestOnConvertibleDebtNetOfTax | $ 15.5 us-gaap_InterestOnConvertibleDebtNetOfTax
Interest cost related to amortization of the discount | $ 12.2 tfx_InterestCostRelatedToAmortizationOfDiscount | $ 11.3 tfx_InterestCostRelatedToAmortizationOfDiscount | $ 10.5 tfx_InterestCostRelatedToAmortizationOfDiscount

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- Definition Interest cost related to amortization of the discount. + References No definition available. + Details
Name: | tfx_InterestCostRelatedToAmortizationOfDiscount
Namespace Prefix: | tfx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The after-tax amount of interest recognized in the period associated with any convertible debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1505-109256 + Details
Name: | us-gaap_InterestOnConvertibleDebtNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration