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v3.20.2

Net Sales - Significant Changes in Contract Liabilities (Details) $ in Millions | 9 Months Ended
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Sep. 27, 2020 USD ($)
Contract With Customer, Asset (Liability) [Roll Forward] |
Beginning balance | $ (0.5)
Net (payments received) / amounts billed | (0.6)
Net (costs incurred) / revenue recognized | 0.9
Ending balance | $ (0.2)

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- Definition Contract With Customer, Liability, Costs Incurred And Revenue Recognized + References No definition available. + Details
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Namespace Prefix: | lxfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Contract With Customer, Liability, Increase From Payments Received And Amounts Billed Over Costs Incurred + References No definition available. + Details
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Namespace Prefix: | lxfr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Contract with Customer, Liability [Roll Forward] + References No definition available. + Details
Name: | lxfr_ContractWithCustomerLiabilityRollForward
Namespace Prefix: | lxfr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130532-203044 + Details
Name: | us-gaap_ContractWithCustomerLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant