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Acquisition related costs (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 29, 2020 | Mar. 31, 2019
Business Combinations [Abstract] |  |
Acquisition related costs | $ (0.2) | $ (4.6)
Release of deferred consideration (recognized in acquisition-related costs) | $ 0.1 |
Acquisition-related costs |  | 4.6
Acquisition termination payment |  | $ 3.5

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- Definition Acquisition and Disposals Related Credits (Costs) + References No definition available. + Details
Name: | lxfr_AcquisitionandDisposalsRelatedCreditsCosts
Namespace Prefix: | lxfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Business Combination Acquisition Termination Payment + References No definition available. + Details
Name: | lxfr_BusinessCombinationAcquisitionTerminationPayment
Namespace Prefix: | lxfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Release of Deferred Consideration + References No definition available. + Details
Name: | lxfr_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisReleaseofDeferredConsideration
Namespace Prefix: | lxfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
Name: | us-gaap_BusinessCombinationAcquisitionRelatedCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_BusinessCombinationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration