XML 64 R61.htm IDEA: XBRL DOCUMENT
v3.19.3

Derivatives and Financial Instruments - Schedule of Derivative Instruments (Details) - Designated as Hedging Instrument £ in Millions | Sep. 29, 2019 GBP (£) € / £ $ / £ | Dec. 31, 2018 GBP (£) € / £ $ / £ Kč / £ $ / £
--- | --- | ---
U.S. dollars | Sales hedges |  |
Derivative [Line Items] |  |
Contract totals/£m |  | £ 4.8
U.S. dollars | Sales hedges | Minimum |  |
Derivative [Line Items] |  |
Exchange rates | $ / £ |  | 1.2519
U.S. dollars | Sales hedges | Maximum |  |
Derivative [Line Items] |  |
Exchange rates | $ / £ |  | 1.3419
U.S. dollars | Purchase hedges |  |
Derivative [Line Items] |  |
Contract totals/£m | £ 5.9 | £ 7.5
U.S. dollars | Purchase hedges | Minimum |  |
Derivative [Line Items] |  |
Exchange rates | $ / £ | 1.2287 | 1.2609
U.S. dollars | Purchase hedges | Maximum |  |
Derivative [Line Items] |  |
Exchange rates | $ / £ | 1.2424 | 1.3380
Euros | Sales hedges |  |
Derivative [Line Items] |  |
Contract totals/£m | £ 3.6 | £ 7.2
Euros | Sales hedges | Minimum |  |
Derivative [Line Items] |  |
Exchange rates | € / £ | 1.1221 | 1.0949
Euros | Sales hedges | Maximum |  |
Derivative [Line Items] |  |
Exchange rates | € / £ | 1.1234 | 1.1702
Euros | Purchase hedges |  |
Derivative [Line Items] |  |
Contract totals/£m | £ 0.8 | £ 1.7
Exchange rates | € / £ | 1.1205 |
Euros | Purchase hedges | Minimum |  |
Derivative [Line Items] |  |
Exchange rates | € / £ |  | 1.1074
Euros | Purchase hedges | Maximum |  |
Derivative [Line Items] |  |
Exchange rates | € / £ |  | 1.1221
Canadian dollars | Purchase hedges |  |
Derivative [Line Items] |  |
Contract totals/£m | £ 5.9 | £ 2.9
Canadian dollars | Purchase hedges | Minimum |  |
Derivative [Line Items] |  |
Exchange rates | 1.6213 | 1.7039
Canadian dollars | Purchase hedges | Maximum |  |
Derivative [Line Items] |  |
Exchange rates | 1.6476 | 1.7416
Czech koruna | Purchase hedges |  |
Derivative [Line Items] |  |
Contract totals/£m |  | £ 0.1
Exchange rates | Kč / £ |  | 28.4490

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Contractual rate at which a foreign currency can be purchased or sold. + References No definition available. + Details
Name: | us-gaap_DerivativeForwardExchangeRate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- 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_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | srt_CurrencyAxis=currency_USD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=lxfr_ForeignExchangeForwardSalesHedgesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=lxfr_ForeignExchangeForwardPurchaseHedgesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_EUR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_CAD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_CZK
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |