LUXFER HOLDINGS�PLC (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line	Label	Object Class	Period Type	Balance	Report ElementName
1	0001000 - Document - DOCUMENT AND ENTITY INFORMATION	Network	*	*	http://www.luxfer.com/role/DocumentAndEntityInformation
2	Implied Table	Table	*	*	implied:Table
3	Document And Entity Information [Abstract]	Abstract			lxfr:DocumentAndEntityInformationAbstract
4	Entity Registrant Name	Concept (Text/String)	For Period		dei:EntityRegistrantName
5	Entity Central Index Key (CIK)	Concept (CIK Number)	For Period		dei:EntityCentralIndexKey
6	Document Type	Concept (Submission Type)	For Period		dei:DocumentType
7	Document Period End Date	Concept (Date)	For Period		dei:DocumentPeriodEndDate
8	Amendment flag	Concept (Yes/No)	For Period		dei:AmendmentFlag
9	Entity Current Reporting Status	Concept (Yes/No)	For Period		dei:EntityCurrentReportingStatus
10	Current Fiscal Year End Date	Concept (Month/Day)	For Period		dei:CurrentFiscalYearEndDate
11	Document Fiscal Year Focus	Concept (Year)	For Period		dei:DocumentFiscalYearFocus
12	Document Fiscal Period Focus	Concept (Fiscal Period)	For Period		dei:DocumentFiscalPeriodFocus
13	Entity Filer Category	Concept (Filer Category)	For Period		dei:EntityFilerCategory
14	Entity Common Stock, Shares Outstanding	Concept (Shares)	As Of		dei:EntityCommonStockSharesOutstanding
15	Entity Well-known Seasoned Issuer	Concept (Yes/No)	For Period		dei:EntityWellKnownSeasonedIssuer
16	Entity Voluntary Filers	Concept (Yes/No)	For Period		dei:EntityVoluntaryFilers
17	1002000 - Statement - CONSOLIDATED INCOME STATEMENT	Network	*	*	http://www.luxfer.com/role/ConsolidatedIncomeStatement
18	Implied Table	Table	*	*	implied:Table
19	Profit or loss [abstract]	Abstract			ifrs-full:IncomeStatementAbstract
20	REVENUE	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
21	Cost of sales	Concept (Monetary)	For Period	Debit	ifrs-full:CostOfSales
22	Gross profit	Concept (Monetary)	For Period	Credit	ifrs-full:GrossProfit
23	Distribution costs	Concept (Monetary)	For Period	Debit	ifrs-full:DistributionCosts
24	Administrative expenses	Concept (Monetary)	For Period	Debit	ifrs-full:AdministrativeExpense
25	Share of results of joint ventures and associates	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
26	TRADING PROFIT	Concept (Monetary)	For Period	Credit	lxfr:TradingProfitLoss
27	Profit on sale of redundant site	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnDisposalsOfNoncurrentAssets
28	Changes to defined benefit pension plans	Concept (Monetary)	For Period	Credit	lxfr:ProfitLossFromOperatingActivitiesChangesToDefinedBenefitPensionPlan
29	Restructuring and other expense	Concept (Monetary)	For Period	Debit	lxfr:ExpenseOfRestructuringActivitiesAndOther
30	OPERATING PROFIT	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromOperatingActivities
31	Other income / (expense):	Abstract			lxfr:NonoperatingIncomeLossAbstract
32	Net gain / (loss) on acquisitions and disposals	Concept (Monetary)	For Period	Credit	lxfr:NonoperatingIncomeExpenseAcquisitionAndDisposals
33	Finance income:	Abstract			lxfr:FinanceIncomeAbstract
34	Interest received	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncome
35	Finance costs:	Abstract			lxfr:FinanceCostsAbstract
36	Interest costs	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpense
37	IAS 19R retirement benefits finance charge	Concept (Monetary)	For Period	Debit	lxfr:IAS19RRetirementBenefitsFinanceCharge
38	Unwind of discount on deferred contingent consideration from acquisitions	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseDueToUnwindingOfDiscountOnProvisions
39	Total finance costs	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
40	PROFIT ON OPERATIONS BEFORE TAXATION	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
41	Income tax expense	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
42	NET INCOME FOR THE YEAR	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
43	Net income for the year attributable to equity shareholders	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity
44	Earnings per share:	Abstract			ifrs-full:EarningsPerShareAbstract
45	Basic	Abstract			ifrs-full:BasicEarningsPerShareAbstract
46	Unadjusted (in USD per share)	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShare
47	Diluted	Abstract			ifrs-full:DilutedEarningsPerShareAbstract
48	Unadjusted (in USD per share)	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShare
49	1003000 - Statement - CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME	Network	*	*	http://www.luxfer.com/role/ConsolidatedStatementOfComprehensiveIncome
50	Implied Table	Table	*	*	implied:Table
51	Statement of comprehensive income [abstract]	Abstract			ifrs-full:StatementOfComprehensiveIncomeAbstract
52	Net income for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
53	Other comprehensive income movements	Abstract			ifrs-full:OtherComprehensiveIncomeAbstract
54	Items that may be reclassified to the consolidated income statement:	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
55	Exchange differences on translation of foreign operations	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
56	Fair value movements in cash flow hedges	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnCashFlowHedgesBeforeTax
57	Transfers to consolidated income statement on cash flow hedges	Concept (Monetary)	For Period	Debit	ifrs-full:ReclassificationAdjustmentsOnCashFlowHedgesBeforeTax
58	Deferred income taxes on cash flow hedges	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome
59	Hedge accounting income / (loss) adjustments	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxCashFlowHedges
60	Total hedge accounting and translation of foreign operations movements	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax
61	Items that will not be reclassified to the consolidated income statement:	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
62	Remeasurement of defined benefit retirement plans	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
63	Deferred income taxes on retirement benefits remeasurements	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome
64	Retirement benefits changes	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax
65	Total other comprehensive income / (loss) movements for the year	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
66	Total comprehensive income / (loss) for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
67	Attributed to:	Abstract			ifrs-full:ComprehensiveIncomeAttributableToAbstract
68	Equity shareholders	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
69	1004000 - Statement - CONSOLIDATED BALANCE SHEET	Network	*	*	http://www.luxfer.com/role/ConsolidatedBalanceSheet
70	Statement [Table]	Table	*	*	lxfr:Statement1Table
71	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
72	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
73	Ordinary shares	Member			ifrs-full:OrdinarySharesMember
74	Deferred shares	Member			lxfr:DeferredSharesMember
75	Statement [Line Items]	LineItems			lxfr:Statement1LineItems
76	ASSETS	Abstract			ifrs-full:AssetsAbstract
77	Non-current assets	Abstract			ifrs-full:NoncurrentAssetsAbstract
78	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
79	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
80	Investments	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInSubsidiariesJointVenturesAndAssociates
81	Deferred income tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
82	Trade and other receivables	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentReceivables
83	Non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
84	Current assets	Abstract			ifrs-full:CurrentAssetsAbstract
85	Current investments	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentInvestments
86	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
87	Trade and other receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivables
88	Income tax receivable	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTaxAssetsCurrent
89	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
90	Current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
91	TOTAL ASSETS	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
92	EQUITY AND LIABILITIES	Abstract			ifrs-full:EquityAndLiabilitiesAbstract
93	Capital and reserves	Abstract			ifrs-full:EquityAbstract
94	Issued capital	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
95	Share premium account	Concept (Monetary)	As Of	Credit	ifrs-full:SharePremium
96	Treasury shares	Concept (Monetary)	As Of	Debit	ifrs-full:TreasuryShares
97	Own shares held by ESOP	Concept (Monetary)	As Of	Debit	lxfr:EmployeeStockOwnershipPlanSharesHeld
98	Retained earnings	Concept (Monetary)	As Of	Credit	ifrs-full:RetainedEarnings
99	Hedging reserve	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfCashFlowHedges
100	Translation reserve	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfExchangeDifferencesOnTranslation
101	Share based compensation reserve	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfSharebasedPayments
102	Merger reserve	Concept (Monetary)	As Of	Credit	ifrs-full:MergerReserve
103	Capital and reserves attributable to the Group's equity shareholders	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAttributableToOwnersOfParent
104	Total equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
105	Non-current liabilities	Abstract			ifrs-full:NoncurrentLiabilitiesAbstract
106	Bank and other loans	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
107	Retirement benefits	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentProvisionsForEmployeeBenefits
108	Deferred income tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
109	Deferred contingent consideration	Concept (Monetary)	As Of	Credit	lxfr:DeferredContingentConsiderationNonCurrent
110	Provisions	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentProvisions
111	Trade and other payables	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentPayables
112	Non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilities
113	Current liabilities	Abstract			ifrs-full:CurrentLiabilitiesAbstract
114	Trade and other payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayables
115	Current income tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentTaxLiabilitiesCurrent
116	Bank and other loans	Concept (Monetary)	As Of	Credit	ifrs-full:ShorttermBorrowings
117	Deferred contingent consideration	Concept (Monetary)	As Of	Credit	lxfr:DeferredContingentConsideration
118	Deferred consideration	Concept (Monetary)	As Of	Credit	lxfr:DeferredConsiderationCurrent
119	Provisions	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentProvisions
120	Overdrafts	Concept (Monetary)	As Of	Credit	ifrs-full:BankOverdraftsClassifiedAsCashEquivalents
121	Current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
122	Total liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
123	TOTAL EQUITY AND LIABILITIES	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAndLiabilities
124	1005000 - Statement - CONSOLIDATED CASH FLOW STATEMENT	Network	*	*	http://www.luxfer.com/role/ConsolidatedCashFlowStatement
125	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
126	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
127	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
128	Bank facilities	Member			lxfr:BankFacilitiesMember
129	Loan Notes	Member			lxfr:LoanNotesMember
130	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
131	RECONCILIATION OF CASH FLOWS FROM CONTINUING OPERATING ACTIVITIES	Abstract			ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
132	Net income for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
133	Adjustments to reconcile net income for the year to net cash flows from continuing operating activities:	Abstract			ifrs-full:AdjustmentsForReconcileProfitLossAbstract
134	Income taxes	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncomeTaxExpense
135	Depreciation and amortization	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDepreciationAndAmortisationExpense
136	Loss on disposal of property, plant and equipment	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForGainLossOnDisposalsPropertyPlantAndEquipment
137	Profit on sale of redundant site	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets
138	Share based compensation charges net of cash settlement	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForSharebasedPayments
139	Net interest costs	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForInterestExpense
140	Non-cash restructuring charges	Abstract			lxfr:NonCashRestructuringChargesAbstract
141	Property, plant and equipment impairment	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
142	Intangible assets impairment	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsAndGoodwill
143	Investment impairment	Concept (Monetary)	For Period	Debit	lxfr:InvestmentsinsubsidiariesjointventuresandassociatesImpairmentLoss
144	Other non-cash restructuring charges	Concept (Monetary)	For Period	Debit	lxfr:OtherNonCashRestructuringCharges
145	Curtailment and past service credits on retirement benefits obligations	Concept (Monetary)	For Period	Credit	lxfr:AdjustmentsForCurtailmentAndPastServiceCreditsOnRetirementBenefitObligations
146	IAS 19R retirement benefits finance charge	Concept (Monetary)	For Period	Debit	lxfr:IAS19RRetirementBenefitsFinanceCharge
147	Acquisitions and disposals costs	Concept (Monetary)	For Period	Credit	lxfr:NonoperatingIncomeExpenseAcquisitionAndDisposals
148	Unwind of discount on deferred contingent consideration from acquisitions	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseDueToUnwindingOfDiscountOnProvisions
149	Share of results of joint ventures and associates	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
150	Changes in operating assets and liabilities:	Abstract			lxfr:ChangesInOperatingAssetsAndLiabilitiesAbstract
151	Sale of assets classified as held for sale	Concept (Monetary)	For Period	Debit	lxfr:AdjustmentsForDecreaseIncreaseOfAssetsHeldForSale
152	(Increase) / decrease in receivables	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
153	Decrease in inventories	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
154	Increase / (decrease) in payables	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables
155	Movement in retirement benefits obligations	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities
156	Movement in provisions	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForProvisions
157	Acquisition approach costs paid	Concept (Monetary)	For Period	Credit	lxfr:AdjustmentsForAcquisitionsAndDisposalsCostsPaidOperatingActivities
158	Income taxes paid	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeTaxesPaidClassifiedAsOperatingActivities
159	NET CASH FLOWS FROM CONTINUING OPERATING ACTIVITIES	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperatingActivities
160	CASH FLOWS FROM INVESTING ACTIVITIES	Abstract			ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
161	Purchases of property, plant and equipment	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
162	Purchases of intangible assets	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities
163	Proceeds from sale of redundant site	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations
164	Receipts from sales of property, plant and equipment	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
165	Cash received as compensation for insured assets	Concept (Monetary)	For Period	Debit	lxfr:CashReceivedAsCompensationForInsuredAssets
166	Investment in joint ventures and associates	Concept (Monetary)	For Period	Credit	ifrs-full:OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivities
167	Interest income received from joint ventures and associates	Concept (Monetary)	For Period	Debit	ifrs-full:InterestReceivedClassifiedAsInvestingActivities
168	Net cash flows on purchase of businesses	Concept (Monetary)	For Period	Credit	ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
169	Acquisition and disposal costs paid	Concept (Monetary)	For Period	Credit	lxfr:AdjustmentsForAcquisitionsAndDisposalsCostsPaidInvestingActivities
170	NET CASH FLOWS FROM INVESTING ACTIVITIES	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivities
171	NET CASH FLOWS BEFORE FINANCING	Concept (Monetary)	For Period	Debit	lxfr:CashFlowsFromUsedInOperatingAndInvestingActivities
172	CASH FLOWS FROM FINANCING ACTIVITIES	Abstract			ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
173	Interest paid	Concept (Monetary)	For Period	Credit	ifrs-full:InterestPaidClassifiedAsFinancingActivities
174	Bank interest received	Concept (Monetary)	For Period	Debit	lxfr:BankInterestReceivedClassifiedAsFinancingActivities
175	(Repayment) / draw down on banking facilities	Concept (Monetary)	For Period	Debit	lxfr:RepaymentsOfProceedsFromBorrowingsClassifiedAsFinancingActivities
176	Extension to long term debt�financing costs	Concept (Monetary)	For Period	Credit	lxfr:FinancingCostsPaidClassifiedAsFinancingActivities
177	Dividends paid	Concept (Monetary)	For Period	Credit	ifrs-full:DividendsPaidClassifiedAsFinancingActivities
178	ESOP cash movements	Concept (Monetary)	For Period	Debit	lxfr:EmployeeStockOwnershipPlanCashMovementsClassifiedAsFinancingActivities
179	Proceeds from issue of shares	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromIssuingShares
180	Treasury shares cash movements	Concept (Monetary)	For Period	Credit	ifrs-full:PaymentsToAcquireOrRedeemEntitysShares
181	NET CASH FLOWS FROM FINANCING ACTIVITIES	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivities
182	NET (DECREASE) / INCREASE IN CASH AND CASH EQUIVALENTS	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges
183	Net foreign exchange differences	Concept (Monetary)	For Period	Debit	ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
184	Net cash and cash equivalents at January 1	Concept (Monetary)	As Of	Debit	lxfr:CashAndCashEquivalentsNet
185	December 31	Concept (Monetary)	As Of	Debit	lxfr:CashAndCashEquivalentsNet
186	1006000 - Statement - CONSOLIDATED STATEMENT OF CHANGES IN EQUITY	Network	*	*	http://www.luxfer.com/role/ConsolidatedStatementOfChangesInEquity
187	Statement of changes in equity [table]	Table	*	*	ifrs-full:StatementOfChangesInEquityTable
188	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
189	Equity [member]	Member			ifrs-full:EquityMember
190	Share capital	Member			ifrs-full:IssuedCapitalMember
191	Share premium account	Member			ifrs-full:SharePremiumMember
192	Treasury shares	Member			ifrs-full:TreasurySharesMember
193	Retained earnings	Member			ifrs-full:RetainedEarningsMember
194	Own shares held by ESOP	Member			lxfr:OwnSharesHeldByEmployeeStockOwnershipPlanMember
195	Other reserves	Member			ifrs-full:OtherReservesMember
196	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
197	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
198	Ordinary shares	Member			ifrs-full:OrdinarySharesMember
199	Deferred shares	Member			lxfr:DeferredSharesMember
200	Statement of changes in equity [line items]	LineItems			ifrs-full:StatementOfChangesInEquityLineItems
201	Beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
202	Net income for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
203	Exchange differences on translation of foreign operations	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
204	Currency translation differences	Concept (Monetary)	For Period	Credit	lxfr:GainsLossesOnExchangeDifferencesOnTranslationOfForeignOperationsAndHedgingReserveNetOfTax
205	Fair value movements in cash flow hedges	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnCashFlowHedgesBeforeTax
206	Increase in fair value of cash flow hedges	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnCashFlowHedgesNetOfTax
207	Transfers to consolidated income statement on cash flow hedges	Concept (Monetary)	For Period	Debit	ifrs-full:ReclassificationAdjustmentsOnCashFlowHedgesBeforeTax
208	Remeasurement of defined benefit retirement plans	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
209	Deferred income taxes on items taken to other comprehensive income	Concept (Monetary)	For Period	Credit	lxfr:DeferredIncomeTaxesOnItemsTakenToOtherComprehensiveIncomeEquity
210	Total comprehensive income / (loss) for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
211	Equity dividends	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsPaid
212	Equity settled share based compensation charges	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
213	Arising from issue of share capital	Concept (Monetary)	For Period	Credit	ifrs-full:IssueOfEquity
214	Purchase of own shares	Concept (Monetary)	For Period	Debit	ifrs-full:PurchaseOfTreasuryShares
215	Purchase of shares from ESOP	Concept (Monetary)	For Period	Credit	lxfr:PurchaseOfSharesFromIntoEmployeeStockOwnershipPlan
216	Utilization of treasury shares	Concept (Monetary)	For Period	Credit	ifrs-full:SaleOrIssueOfTreasuryShares
217	Utilization of shares from ESOP	Concept (Monetary)	For Period	Credit	lxfr:UtilizationOfSharesFromEmployeeStockOwnershipPlan
218	Deferred income taxes on items taken to equity	Concept (Monetary)	For Period		ifrs-full:DeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity
219	Exchange movement on ESOP	Concept (Monetary)	For Period	Credit	lxfr:ExchangeMovementOnEmployeeStockOwnershipPlan
220	Other changes in equity in the year	Concept (Monetary)	For Period	Credit	lxfr:IncreaseDecreaseThroughOtherChangeExcludingComprehensiveIncomeEquity
221	Ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
222	1006001 - Statement - CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Parenthetical)	Network	*	*	http://www.luxfer.com/role/ConsolidatedStatementOfChangesInEquityParenthetical
223	Implied Table	Table	*	*	implied:Table
224	Statement of changes in equity [abstract]	Abstract			ifrs-full:StatementOfChangesInEquityAbstract
225	Hedging reserve	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfCashFlowHedges
226	Translation reserve	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfExchangeDifferencesOnTranslation
227	Merger reserve	Concept (Monetary)	As Of	Credit	ifrs-full:MergerReserve
228	Share based compensation reserve	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfSharebasedPayments
229	2101100 - Disclosure - Accounting policies	Network	*	*	http://www.luxfer.com/role/AccountingPolicies
230	Implied Table	Table	*	*	implied:Table
231	Disclosure Of Accounting Policies [Abstract]	Abstract			lxfr:DisclosureOfAccountingPoliciesAbstract
232	Accounting policies	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
233	2104100 - Disclosure - Revenue and segmental analysis	Network	*	*	http://www.luxfer.com/role/RevenueAndSegmentalAnalysis
234	Implied Table	Table	*	*	implied:Table
235	Disclosure of entity's operating segments [Abstract]	Abstract			lxfr:DisclosureofentitysoperatingsegmentsAbstract
236	Revenue and segmental analysis	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
237	2107100 - Disclosure - Operating profit	Network	*	*	http://www.luxfer.com/role/OperatingProfit
238	Implied Table	Table	*	*	implied:Table
239	Analysis of income and expense [abstract]	Abstract			ifrs-full:AnalysisOfIncomeAndExpenseAbstract
240	Operating profit	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfProfitLossFromOperatingActivitiesExplanatory
241	2110100 - Disclosure - Fees payable to auditors	Network	*	*	http://www.luxfer.com/role/FeesPayableToAuditors
242	Implied Table	Table	*	*	implied:Table
243	Auditor's remuneration [abstract]	Abstract			ifrs-full:AuditorsRemunerationAbstract
244	Fees payable to auditors	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfAdditionalInformationExplanatory
245	2113100 - Disclosure - Other income/ (expense) items	Network	*	*	http://www.luxfer.com/role/OtherIncomeExpenseItems
246	Implied Table	Table	*	*	implied:Table
247	Analysis of income and expense [abstract]	Abstract			ifrs-full:AnalysisOfIncomeAndExpenseAbstract
248	Other income/ (expense) items	Concept (Text Block (HTML))	For Period		lxfr:DisclosureOfOtherIncomeExpenseTextBlock
249	2116100 - Disclosure - Staff Costs	Network	*	*	http://www.luxfer.com/role/StaffCosts
250	Implied Table	Table	*	*	implied:Table
251	Analysis of income and expense [abstract]	Abstract			ifrs-full:AnalysisOfIncomeAndExpenseAbstract
252	Staff Costs	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
253	2119100 - Disclosure - Finance income	Network	*	*	http://www.luxfer.com/role/FinanceIncome
254	Implied Table	Table	*	*	implied:Table
255	Analysis of income and expense [abstract]	Abstract			ifrs-full:AnalysisOfIncomeAndExpenseAbstract
256	Finance income	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinanceIncomeExplanatory
257	2122100 - Disclosure - Finance costs	Network	*	*	http://www.luxfer.com/role/FinanceCosts
258	Implied Table	Table	*	*	implied:Table
259	Analysis of income and expense [abstract]	Abstract			ifrs-full:AnalysisOfIncomeAndExpenseAbstract
260	Finance costs	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinanceCostExplanatory
261	2125100 - Disclosure - Income taxes	Network	*	*	http://www.luxfer.com/role/IncomeTaxes
262	Implied Table	Table	*	*	implied:Table
263	Income Taxes [Abstract]	Abstract			lxfr:IncomeTaxesAbstract
264	Income taxes	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIncomeTaxExplanatory
265	2128100 - Disclosure - Earnings per share	Network	*	*	http://www.luxfer.com/role/EarningsPerShare
266	Implied Table	Table	*	*	implied:Table
267	Earnings per share [abstract]	Abstract			ifrs-full:EarningsPerShareAbstract
268	Earnings per share	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEarningsPerShareExplanatory
269	2131100 - Disclosure - Property, plant and equipment	Network	*	*	http://www.luxfer.com/role/PropertyPlantAndEquipment
270	Implied Table	Table	*	*	implied:Table
271	Property, plant and equipment [abstract]	Abstract			ifrs-full:PropertyPlantAndEquipmentAbstract
272	Property, plant and equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
273	2134100 - Disclosure - Intangible assets	Network	*	*	http://www.luxfer.com/role/IntangibleAssets
274	Implied Table	Table	*	*	implied:Table
275	Disclosure of detailed information about intangible assets [abstract]	Abstract			ifrs-full:DisclosureOfIntangibleAssetsAbstract
276	Intangible assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIntangibleAssetsExplanatory
277	2137100 - Disclosure - Impairment of goodwill	Network	*	*	http://www.luxfer.com/role/ImpairmentOfGoodwill
278	Implied Table	Table	*	*	implied:Table
279	Impairment Of Assets [Abstract]	Abstract			lxfr:ImpairmentOfAssetsAbstract
280	Impairment of goodwill	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfImpairmentOfAssetsExplanatory
281	2140100 - Disclosure - Investments	Network	*	*	http://www.luxfer.com/role/Investments
282	Implied Table	Table	*	*	implied:Table
283	Financial Instruments [Abstract]	Abstract			lxfr:FinancialInstrumentsAbstract
284	Investments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
285	2143100 - Disclosure - Inventories	Network	*	*	http://www.luxfer.com/role/Inventories
286	Implied Table	Table	*	*	implied:Table
287	Classes of current inventories [abstract]	Abstract			ifrs-full:ClassesOfInventoriesAbstract
288	Inventories	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInventoriesExplanatory
289	2146100 - Disclosure - Trade and other receivables	Network	*	*	http://www.luxfer.com/role/TradeAndOtherReceivables
290	Implied Table	Table	*	*	implied:Table
291	Trade and other receivables [abstract]	Abstract			ifrs-full:TradeAndOtherReceivablesAbstract
292	Trade and other receivables	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
293	2149100 - Disclosure - Cash and cash equivalents	Network	*	*	http://www.luxfer.com/role/CashAndCashEquivalents
294	Implied Table	Table	*	*	implied:Table
295	Cash and cash equivalents [abstract]	Abstract			ifrs-full:CashAndCashEquivalentsAbstract
296	Cash and cash equivalents	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory
297	2152100 - Disclosure - Share capital	Network	*	*	http://www.luxfer.com/role/ShareCapital
298	Implied Table	Table	*	*	implied:Table
299	Share Capital, Reserves And Other Equity Interest [Abstract]	Abstract			lxfr:ShareCapitalReservesAndOtherEquityInterestAbstract
300	Share capital	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
301	2155100 - Disclosure - Dividends paid and proposed	Network	*	*	http://www.luxfer.com/role/DividendsPaidAndProposed
302	Implied Table	Table	*	*	implied:Table
303	Disclosure Of Dividends [Abstract]	Abstract			lxfr:DisclosureOfDividendsAbstract
304	Dividends paid and proposed	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDividendsExplanatory
305	2158100 - Disclosure - Reserves	Network	*	*	http://www.luxfer.com/role/Reserves
306	Implied Table	Table	*	*	implied:Table
307	Share Capital, Reserves And Other Equity Interest [Abstract]	Abstract			lxfr:ShareCapitalReservesAndOtherEquityInterestAbstract
308	Reserves	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReservesAndOtherEquityInterestExplanatory
309	2161100 - Disclosure - Bank and other loans	Network	*	*	http://www.luxfer.com/role/BankAndOtherLoans
310	Implied Table	Table	*	*	implied:Table
311	Borrowings [abstract]	Abstract			ifrs-full:BorrowingsAbstract
312	Bank and other loans	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBorrowingsExplanatory
313	2164100 - Disclosure - Provisions	Network	*	*	http://www.luxfer.com/role/Provisions
314	Implied Table	Table	*	*	implied:Table
315	Other Provisions, Contingent Liabilities And Contingent Assets [Abstract]	Abstract			lxfr:OtherProvisionsContingentLiabilitiesAndContingentAssetsAbstract
316	Provisions	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfProvisionsExplanatory
317	2167100 - Disclosure - Deferred income taxes	Network	*	*	http://www.luxfer.com/role/DeferredIncomeTaxes
318	Implied Table	Table	*	*	implied:Table
319	Disclosure Of Income Tax [Abstract]	Abstract			lxfr:DisclosureOfIncomeTaxAbstract
320	Deferred income taxes	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDeferredTaxesExplanatory
321	2170100 - Disclosure - Trade and other payables	Network	*	*	http://www.luxfer.com/role/TradeAndOtherPayables
322	Implied Table	Table	*	*	implied:Table
323	Trade and other payables [abstract]	Abstract			ifrs-full:TradeAndOtherPayablesAbstract
324	Trade and other payables	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTradeAndOtherPayablesExplanatory
325	2173100 - Disclosure - Acquisitions	Network	*	*	http://www.luxfer.com/role/Acquisitions
326	Implied Table	Table	*	*	implied:Table
327	Disclosure of detailed information about business combination [abstract]	Abstract			ifrs-full:DisclosureOfBusinessCombinationsAbstract
328	Acquisitions	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBusinessCombinationsExplanatory
329	2176100 - Disclosure - Commitments and contingencies	Network	*	*	http://www.luxfer.com/role/CommitmentsAndContingencies
330	Implied Table	Table	*	*	implied:Table
331	Disclosures Of Commitments And Contingencies [Abstract]	Abstract			lxfr:DisclosuresOfCommitmentsAndContingenciesAbstract
332	Commitments and contingencies	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
333	2179100 - Disclosure - Financial risk management objectives and policies	Network	*	*	http://www.luxfer.com/role/FinancialRiskManagementObjectivesAndPolicies
334	Implied Table	Table	*	*	implied:Table
335	Financial Instruments [Abstract]	Abstract			lxfr:FinancialInstrumentsAbstract
336	Financial risk management objectives and policies	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialRiskManagementExplanatory
337	2182100 - Disclosure - Financial instruments	Network	*	*	http://www.luxfer.com/role/FinancialInstruments
338	Implied Table	Table	*	*	implied:Table
339	Financial Instruments [Abstract]	Abstract			lxfr:FinancialInstrumentsAbstract
340	Financial instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
341	2185100 - Disclosure - Retirement benefits	Network	*	*	http://www.luxfer.com/role/RetirementBenefits
342	Implied Table	Table	*	*	implied:Table
343	Employee Benefits [Abstract]	Abstract			lxfr:EmployeeBenefitsAbstract
344	Retirement benefits	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
345	2188100 - Disclosure - The Luxfer Group Employee Share Ownership Plan	Network	*	*	http://www.luxfer.com/role/LuxferGroupEmployeeShareOwnershipPlan
346	Implied Table	Table	*	*	implied:Table
347	Share-based Payment Arrangements [Abstract]	Abstract			lxfr:SharebasedPaymentArrangementsAbstract
348	The Luxfer Group Employee Share Ownership Plan	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSharebasedPaymentArrangementsExplanatory
349	2191100 - Disclosure - Share based compensation	Network	*	*	http://www.luxfer.com/role/ShareBasedCompensation
350	Implied Table	Table	*	*	implied:Table
351	Disclosure Of Share-Based Payment Arrangements [Abstract]	Abstract			lxfr:DisclosureOfShareBasedPaymentArrangementsAbstract
352	Share based compensation	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSharebasedPaymentArrangementsExplanatory
353	2194100 - Disclosure - Related party transactions	Network	*	*	http://www.luxfer.com/role/RelatedPartyTransactions
354	Implied Table	Table	*	*	implied:Table
355	Disclosure Of Related Party [Abstract]	Abstract			lxfr:DisclosureOfRelatedPartyAbstract
356	Related party transactions	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRelatedPartyExplanatory
357	2195100 - Disclosure - Post Balance Sheet Events	Network	*	*	http://www.luxfer.com/role/PostBalanceSheetEvents
358	Implied Table	Table	*	*	implied:Table
359	Disclosure of events after reporting period [Abstract]	Abstract			lxfr:DisclosureofeventsafterreportingperiodAbstract
360	Post Balance Sheet Events	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
361	2201201 - Disclosure - Accounting policies (Policies)	Network	*	*	http://www.luxfer.com/role/AccountingPoliciesPolicies
362	Implied Table	Table	*	*	implied:Table
363	Disclosure Of Accounting Policies [Abstract]	Abstract			lxfr:DisclosureOfAccountingPoliciesAbstract
364	Basis of preparation	Concept (Text Block (HTML))	For Period		lxfr:BasisOfAccountingPoliciesPolicyTextBlock
365	Statement of compliance with IFRS	Concept (Text Block (HTML))	For Period		ifrs-full:StatementOfIFRSCompliance
366	Basis of consolidation	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForSubsidiariesExplanatory
367	Presentation currency	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFunctionalCurrencyExplanatory
368	Business combinations and goodwill	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForBusinessCombinationsAndGoodwillExplanatory
369	Other intangible assets	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory
370	Revenue	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
371	Property, plant and equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
372	Inventories	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
373	Foreign currencies	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
374	Income taxes	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
375	Leases	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
376	Retirement benefits costs	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
377	Provisions	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
378	Share based compensation	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory
379	Separate disclosure of expenses or income	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForTradingIncomeAndExpenseExplanatory
380	Cash and cash equivalents	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents
381	Interest in joint ventures	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForInvestmentsInJointVentures
382	Interest in associates	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForInvestmentInAssociates
383	Trade and other receivables	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory
384	Bank and other loans	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForBorrowingsExplanatory
385	Trade payables	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherPayablesExplanatory
386	Derivative financial instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsExplanatory
387	Financial liabilities and equity instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
388	Critical accounting judgments and key sources of estimation uncertainty	Concept (Text Block (HTML))	For Period		lxfr:UseOfEstimatesPolicyTextBlock
389	Changes in accounting policies and New standards and amendments to standards not applied	Concept (Text Block (HTML))	For Period		lxfr:DisclosureOfAccountingStandardsOrInterpretationsAdoptedAndToBeAdoptedPolicyTextBlock
390	2301302 - Disclosure - Accounting policies (Tables)	Network	*	*	http://www.luxfer.com/role/AccountingPoliciesTables
391	Implied Table	Table	*	*	implied:Table
392	Disclosure Of Accounting Policies [Abstract]	Abstract			lxfr:DisclosureOfAccountingPoliciesAbstract
393	Disclosure of intangible assets useful life	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory
394	Disclosure of property, plant and equipment rate of annual charge	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
395	Schedule of changes in accounting policies	Concept (Text Block (HTML))	For Period		lxfr:ScheduleOfChangesInAccountingPoliciesTableTextBlock
396	2304301 - Disclosure - Revenue and segmental analysis (Tables)	Network	*	*	http://www.luxfer.com/role/RevenueAndSegmentalAnalysisTables
397	Implied Table	Table	*	*	implied:Table
398	Disclosure of entity's operating segments [Abstract]	Abstract			lxfr:DisclosureofentitysoperatingsegmentsAbstract
399	Schedule of operating segments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOperatingSegmentsExplanatory
400	Disclosure of geographical areas	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfGeographicalAreasExplanatory
401	2307301 - Disclosure - Operating profit (Tables)	Network	*	*	http://www.luxfer.com/role/OperatingProfitTables
402	Implied Table	Table	*	*	implied:Table
403	Analysis of income and expense [abstract]	Abstract			ifrs-full:AnalysisOfIncomeAndExpenseAbstract
404	Schedule of operating profit	Concept (Text Block (HTML))	For Period		lxfr:ScheduleOfProfitLossFromOperatingActivitiesTableTextBlock
405	2310301 - Disclosure - Fees payable to auditors (Tables)	Network	*	*	http://www.luxfer.com/role/FeesPayableToAuditorsTables
406	Implied Table	Table	*	*	implied:Table
407	Auditor's remuneration [abstract]	Abstract			ifrs-full:AuditorsRemunerationAbstract
408	Disclosure of fees payable to auditors	Concept (Text Block (HTML))	For Period		lxfr:DisclosureOfAuditorsRenumerationTableTextBlock
409	2313301 - Disclosure - Other income/ (expense) items (Tables)	Network	*	*	http://www.luxfer.com/role/OtherIncomeExpenseItemsTables
410	Implied Table	Table	*	*	implied:Table
411	Analysis of income and expense [abstract]	Abstract			ifrs-full:AnalysisOfIncomeAndExpenseAbstract
412	Schedule of other income/ (expense) items	Concept (Text Block (HTML))	For Period		lxfr:ScheduleOfOtherIncomeExpenseTableTextBlock
413	2316301 - Disclosure - Staff Costs (Tables)	Network	*	*	http://www.luxfer.com/role/StaffCostsTables
414	Implied Table	Table	*	*	implied:Table
415	Analysis of income and expense [abstract]	Abstract			ifrs-full:AnalysisOfIncomeAndExpenseAbstract
416	Components of Staff Costs	Concept (Text Block (HTML))	For Period		lxfr:ScheduleOfStaffCostsComponentsTableTextBlock
417	Average monthly number of employees	Concept (Text Block (HTML))	For Period		lxfr:DisclosureOfInformationAboutEmployeesTableTextBlock
418	2319301 - Disclosure - Finance income (Tables)	Network	*	*	http://www.luxfer.com/role/FinanceIncomeTables
419	Implied Table	Table	*	*	implied:Table
420	Analysis of income and expense [abstract]	Abstract			ifrs-full:AnalysisOfIncomeAndExpenseAbstract
421	Schedule Of Finance Income	Concept (Text Block (HTML))	For Period		lxfr:ScheduleOfFinanceIncomeTableTextBlock
422	2322301 - Disclosure - Finance costs (Tables)	Network	*	*	http://www.luxfer.com/role/FinanceCostsTables
423	Implied Table	Table	*	*	implied:Table
424	Analysis of income and expense [abstract]	Abstract			ifrs-full:AnalysisOfIncomeAndExpenseAbstract
425	Schedule of finance costs	Concept (Text Block (HTML))	For Period		lxfr:ScheduleOfFinanceCostTableTextBlock
426	2325301 - Disclosure - Income taxes (Tables)	Network	*	*	http://www.luxfer.com/role/IncomeTaxesTables
427	Implied Table	Table	*	*	implied:Table
428	Income Taxes [Abstract]	Abstract			lxfr:IncomeTaxesAbstract
429	Analysis of taxation charge for the year	Concept (Text Block (HTML))	For Period		lxfr:DisclosureOfMajorComponentsOfTaxExpenseIncomeTableTextBlock
430	Factors affecting the taxation charge for the year	Concept (Text Block (HTML))	For Period		lxfr:ScheduleOfEffectiveIncomeTaxRateReconciliation1TableTextBlock
431	2328301 - Disclosure - Earnings per share (Tables)	Network	*	*	http://www.luxfer.com/role/EarningsPerShareTables
432	Implied Table	Table	*	*	implied:Table
433	Earnings per share [abstract]	Abstract			ifrs-full:EarningsPerShareAbstract
434	Schedule of earnings per share	Concept (Text Block (HTML))	For Period		ifrs-full:EarningsPerShareExplanatory
435	2331301 - Disclosure - Property, plant and equipment (Tables)	Network	*	*	http://www.luxfer.com/role/PropertyPlantAndEquipmentTables
436	Implied Table	Table	*	*	implied:Table
437	Property, plant and equipment [abstract]	Abstract			ifrs-full:PropertyPlantAndEquipmentAbstract
438	Schedule of property, plant and equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
439	2334301 - Disclosure - Intangible assets (Tables)	Network	*	*	http://www.luxfer.com/role/IntangibleAssetsTables
440	Implied Table	Table	*	*	implied:Table
441	Disclosure of detailed information about intangible assets [abstract]	Abstract			ifrs-full:DisclosureOfIntangibleAssetsAbstract
442	Disclosure of reconciliation of changes in intangible assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory
443	2337301 - Disclosure - Impairment of goodwill (Tables)	Network	*	*	http://www.luxfer.com/role/ImpairmentOfGoodwillTables
444	Implied Table	Table	*	*	implied:Table
445	Impairment Of Assets [Abstract]	Abstract			lxfr:ImpairmentOfAssetsAbstract
446	Disclosure of reconciliation of changes in goodwill	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillExplanatory
447	2340301 - Disclosure - Investments (Tables)	Network	*	*	http://www.luxfer.com/role/InvestmentsTables
448	Implied Table	Table	*	*	implied:Table
449	Financial Instruments [Abstract]	Abstract			lxfr:FinancialInstrumentsAbstract
450	Schedule of Joint Ventures and Associates	Concept (Text Block (HTML))	For Period		lxfr:ScheduleOfJointVenturesAndAssociatesTableTextBlock
451	2343301 - Disclosure - Inventories (Tables)	Network	*	*	http://www.luxfer.com/role/InventoriesTables
452	Implied Table	Table	*	*	implied:Table
453	Classes of current inventories [abstract]	Abstract			ifrs-full:ClassesOfInventoriesAbstract
454	Schedule of Inventories	Concept (Text Block (HTML))	For Period		lxfr:ScheduleofInventoryCurrent1TableTextBlock
455	2346301 - Disclosure - Trade and other receivables (Tables)	Network	*	*	http://www.luxfer.com/role/TradeAndOtherReceivablesTables
456	Implied Table	Table	*	*	implied:Table
457	Trade and other receivables [abstract]	Abstract			ifrs-full:TradeAndOtherReceivablesAbstract
458	Schedule of trade and other receivable	Concept (Text Block (HTML))	For Period		lxfr:ScheduleOfTradeAndOtherReceivablesTableTextBlock
459	Schedule of movements in provision for impairment of trade receivable and amounts owed by joint ventures and associates	Concept (Text Block (HTML))	For Period		lxfr:ScheduleOfMovementsInProvisionForDoubtfulAccountsTableTextBlock
460	2349301 - Disclosure - Cash and cash equivalents (Tables)	Network	*	*	http://www.luxfer.com/role/CashAndCashEquivalentsTables
461	Implied Table	Table	*	*	implied:Table
462	Cash and cash equivalents [abstract]	Abstract			ifrs-full:CashAndCashEquivalentsAbstract
463	Schedule of cash and cash equivalents	Concept (Text Block (HTML))	For Period		lxfr:ScheduleOfCashAndCashEquivalents1TableTextBlock
464	2352301 - Disclosure - Share capital (Tables)	Network	*	*	http://www.luxfer.com/role/ShareCapitalTables
465	Implied Table	Table	*	*	implied:Table
466	Share Capital, Reserves And Other Equity Interest [Abstract]	Abstract			lxfr:ShareCapitalReservesAndOtherEquityInterestAbstract
467	Disclosure of classes of share capital	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfClassesOfShareCapitalExplanatory
468	2355301 - Disclosure - Dividends paid and proposed (Tables)	Network	*	*	http://www.luxfer.com/role/DividendsPaidAndProposedTables
469	Implied Table	Table	*	*	implied:Table
470	Disclosure Of Dividends [Abstract]	Abstract			lxfr:DisclosureOfDividendsAbstract
471	Schedule of dividends	Concept (Text Block (HTML))	For Period		lxfr:ScheduleOfDividendsTableTextBlock
472	2358301 - Disclosure - Reserves (Tables)	Network	*	*	http://www.luxfer.com/role/ReservesTables
473	Implied Table	Table	*	*	implied:Table
474	Share Capital, Reserves And Other Equity Interest [Abstract]	Abstract			lxfr:ShareCapitalReservesAndOtherEquityInterestAbstract
475	Disclosure of reserves within equity	Concept (Text Block (HTML))	For Period		lxfr:DisclosureOfReservesWithinEquityTableTextBlock
476	2361301 - Disclosure - Bank and other loans (Tables)	Network	*	*	http://www.luxfer.com/role/BankAndOtherLoansTables
477	Implied Table	Table	*	*	implied:Table
478	Borrowings [abstract]	Abstract			ifrs-full:BorrowingsAbstract
479	Schedule of bank and other loans	Concept (Text Block (HTML))	For Period		lxfr:ScheduleOfBorrowingsTableTextBlock
480	2364301 - Disclosure - Provisions (Tables)	Network	*	*	http://www.luxfer.com/role/ProvisionsTables
481	Implied Table	Table	*	*	implied:Table
482	Other Provisions, Contingent Liabilities And Contingent Assets [Abstract]	Abstract			lxfr:OtherProvisionsContingentLiabilitiesAndContingentAssetsAbstract
483	Disclosure of other provisions	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherProvisionsExplanatory
484	2367301 - Disclosure - Deferred income taxes (Tables)	Network	*	*	http://www.luxfer.com/role/DeferredIncomeTaxesTables
485	Implied Table	Table	*	*	implied:Table
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488	Schedule of deferred income tax assets and liabilities	Concept (Text Block (HTML))	For Period		lxfr:DisclosureOfDeferredIncomeTaxAssetsAndLiabilitiesTableTextBlock
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493	2373301 - Disclosure - Acquisitions (Tables)	Network	*	*	http://www.luxfer.com/role/AcquisitionsTables
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515	Disclosure of fair value measurement of liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFairValueMeasurementOfLiabilitiesExplanatory
516	Disclosure of financial instruments by type of interest rate	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateExplanatory
517	Disclosure of information about terms and conditions of hedging instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInformationAboutTermsAndConditionsOfHedgingInstrumentsAndHowTheyAffectFutureCashFlowsExplanatory
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525	Disclosure of sensitivity analysis for actuarial assumptions	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsExplanatory
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527	Implied Table	Table	*	*	implied:Table
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534	Disclosure of number and weighted average exercise prices of share options	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory
535	Disclosure of assumptions used in deriving fair value of share options	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedShareOptionsGrantedDuringPeriodExplanatory
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594	Loss on disposal of property, plant and equipment	Concept (Monetary)	For Period	Debit	ifrs-full:LossesOnDisposalsOfPropertyPlantAndEquipment
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604	Unwind of discount on deferred contingent consideration from acquisitions	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseDueToUnwindingOfDiscountOnProvisions
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611	Net assets / (liabilities) employed	Concept (Monetary)	As Of	Debit	ifrs-full:NetAssetsLiabilities
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734	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
735	Profit on sale of redundant site	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnDisposalsOfNoncurrentAssets
736	Changes to defined benefit pension plans	Concept (Monetary)	For Period	Credit	lxfr:ProfitLossFromOperatingActivitiesChangesToDefinedBenefitPensionPlan
737	Sale of deferred pensioner liabilities, amount	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughBusinessCombinationsAndDisposalsNetDefinedBenefitLiabilityAsset
738	Payment to certain deferred pensioners	Concept (Monetary)	For Period	Credit	lxfr:PaymentToCertainDeferredPensioners
739	Actuarial gains on financial assumptions	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
740	Curtailment credit arising from changes to defined benefit pension plans	Concept (Monetary)	For Period	Credit	lxfr:CurtailmentCostNetDefinedBenefitLiabilityAsset
741	Advisory costs related to changes to defined benefit pension plans	Concept (Monetary)	For Period	Debit	lxfr:AdvisoryCostsRelatedToChangesToDefinedBenefitPensionPlans
742	Expense of restructuring activities	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseOfRestructuringActivities
743	Losses on litigation settlements	Concept (Monetary)	For Period	Debit	ifrs-full:LossesOnLitigationSettlements
744	Number of facilities closure during rationalization of operations	Concept (Integer)	For Period		lxfr:NumberOfFacilitiesClosureDuringRestructuring
745	Litigation costs	Concept (Monetary)	For Period	Debit	lxfr:LitigationCosts
746	Direct listing costs	Concept (Monetary)	For Period	Debit	lxfr:DirectListingCosts
747	Non-current asset impairments	Concept (Monetary)	For Period	Debit	lxfr:ImpairmentsLossonNonCurrentAsset
748	Receivable impairment provision	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLossRecognisedInProfitOrLossTradeReceivables
749	I.P.O. related share based compensation charges	Concept (Monetary)	For Period	Debit	lxfr:ShareBasedCompensationChargesRelatedToInitialPublicOffering
750	Merger and acquisition costs	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionrelatedCostsRecognisedAsExpenseForTransactionRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombination
751	Environment costs	Concept (Monetary)	For Period	Debit	lxfr:EnvironmentalRemediationExpense1
752	Consideration transferred, acquisition-date fair value	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
753	Net assets acquired	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
754	Gain on bargain purchase	Concept (Monetary)	For Period	Credit	ifrs-full:GainRecognisedInBargainPurchaseTransaction
755	Merger and acquisition related costs, excluding legal costs	Concept (Monetary)	For Period	Credit	lxfr:MergerAndAcquisitionRelatedCostsExcludingLegalCosts
756	Merger and acquisition legal costs	Concept (Monetary)	For Period	Debit	lxfr:MergerAndAcquisitionLegalCosts
757	Remeasurement of deferred contingent consideration	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInContingentConsiderationAssetLiability
758	2416402 - Disclosure - Staff Costs - Components of Staff Costs (Details)	Network	*	*	http://www.luxfer.com/role/StaffCostsComponentsOfStaffCostsDetails
759	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
760	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
761	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
762	Board of Directors	Member			lxfr:BoardOfDirectorsMember
763	Disclosure of transactions between related parties [line items]	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
764	Remuneration (short-term benefits)	Concept (Monetary)	For Period	Debit	ifrs-full:ShorttermEmployeeBenefitsExpense
765	Wages and salaries	Concept (Monetary)	For Period	Debit	ifrs-full:WagesAndSalaries
766	Social security costs	Concept (Monetary)	For Period	Debit	ifrs-full:SocialSecurityContributions
767	Post-retirement benefits	Concept (Monetary)	For Period	Debit	ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans
768	Retirement benefits costs	Concept (Monetary)	For Period	Debit	lxfr:RetirementBenefitCosts
769	Compensation for loss of office	Concept (Monetary)	For Period	Debit	lxfr:CompensationForLossOfOffice
770	IAS 19R retirement benefits finance charge	Concept (Monetary)	For Period	Debit	lxfr:IAS19RRetirementBenefitsFinanceCharge
771	Redundancy costs: Continuing activities	Concept (Monetary)	For Period	Debit	ifrs-full:TerminationBenefitsExpense
772	Share based compensation charges (Note 31)	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
773	Staff costs	Concept (Monetary)	For Period	Debit	ifrs-full:EmployeeBenefitsExpense
774	2416403 - Disclosure - Staff Costs - Average monthly number of employees (Details)	Network	*	*	http://www.luxfer.com/role/StaffCostsAverageMonthlyNumberOfEmployeesDetails
775	Disclosure of products and services [table]	Table	*	*	ifrs-full:DisclosureOfProductsAndServicesTable
776	Products and services [axis]	Axis			ifrs-full:ProductsAndServicesAxis
777	Products and services [member]	Member			ifrs-full:ProductsAndServicesMember
778	Production and distribution	Member			lxfr:ProductionAndDistributionMember
779	Sales and administration	Member			lxfr:SalesAndAdministrationMember
780	Research and development	Member			lxfr:ResearchAndDevelopmentMember
781	Disclosure of products and services [line items]	LineItems			ifrs-full:DisclosureOfProductsAndServicesLineItems
782	Average number of employees	Concept (Decimal)	For Period		ifrs-full:AverageNumberOfEmployees
783	2416404 - Disclosure - Staff Costs - Additional Information (Details)	Network	*	*	http://www.luxfer.com/role/StaffCostsAdditionalInformationDetails
784	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
785	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
786	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
787	Directors	Member			ifrs-full:KeyManagementPersonnelOfEntityOrParentMember
788	Disclosure of transactions between related parties [line items]	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
789	Capital expenditure: Property, plant and equipment	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
790	Sales of property	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
791	2419402 - Disclosure - Finance income (Details)	Network	*	*	http://www.luxfer.com/role/FinanceIncomeDetails
792	Implied Table	Table	*	*	implied:Table
793	Analysis of income and expense [abstract]	Abstract			ifrs-full:AnalysisOfIncomeAndExpenseAbstract
794	Bank interest received	Concept (Monetary)	For Period	Credit	ifrs-full:InterestIncomeOnLoansAndAdvancesToBanks
795	Other interest received	Concept (Monetary)	For Period	Credit	ifrs-full:InterestIncomeOnOtherFinancialAssets
796	Foreign exchange gains on financing activities	Concept (Monetary)	For Period	Credit	lxfr:NetForeignExchangeGainOnFinancingActivities
797	Total finance income	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncome
798	2422402 - Disclosure - Finance costs (Details)	Network	*	*	http://www.luxfer.com/role/FinanceCostsDetails
799	Implied Table	Table	*	*	implied:Table
800	Analysis of income and expense [abstract]	Abstract			ifrs-full:AnalysisOfIncomeAndExpenseAbstract
801	Bank and other loan interest payable	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpenseOnBankLoansAndOverdrafts
802	Amortization of issue costs	Concept (Monetary)	For Period	Debit	lxfr:AmortisationOfFinancingCosts
803	Foreign exchange loss on financing activities	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities
804	IAS 19R retirement benefits finance charge	Concept (Monetary)	For Period	Debit	lxfr:IAS19RRetirementBenefitsFinanceCharge
805	Unwind of discount on deferred contingent consideration from acquisitions	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseDueToUnwindingOfDiscountOnProvisions
806	Total finance costs	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
807	2425402 - Disclosure - Income taxes - Analysis of taxation charge for the year (Details)	Network	*	*	http://www.luxfer.com/role/IncomeTaxesAnalysisOfTaxationChargeForYearDetails
808	Entity Location [Table]	Table	*	*	dei:EntityLocationTable
809	Income Tax Authority1 [Axis]	Axis			lxfr:IncomeTaxAuthority1Axis
810	Income Tax Authority1 [Domain]	Member			lxfr:IncomeTaxAuthority1Domain
811	U.K.	Member			lxfr:DomesticCountry1Member
812	Non-U.K.	Member			lxfr:ForeignCountry1Member
813	Segments [axis]	Axis			ifrs-full:SegmentsAxis
814	Segments [member]	Member			ifrs-full:SegmentsMember
815	Gas Cylinders	Member			lxfr:GasCylindersDivisionMember
816	Entity Location [Line Items]	LineItems			dei:EntityLocationLineItems
817	Current income taxes:	Abstract			ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriodsAbstract
818	Corporate tax	Concept (Monetary)	For Period	Debit	ifrs-full:CurrentTaxExpenseIncome
819	Adjustments in respect of previous years	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForCurrentTaxOfPriorPeriod
820	Total current tax charge	Concept (Monetary)	For Period	Debit	ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriods
821	Origination and reversal of temporary differences	Concept (Monetary)	For Period	Debit	ifrs-full:DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences
822	Adjustments in respect of previous years	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDeferredTaxOfPriorPeriods
823	Total deferred income taxes (credit) / charge	Concept (Monetary)	For Period	Debit	ifrs-full:DeferredTaxExpenseIncome
824	Tax on profit on operations	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
825	Tax expense from discontinued operations	Concept (Monetary)	For Period	Debit	ifrs-full:TaxExpenseRelatingToProfitLossFromOrdinaryActivitiesOfDiscontinuedOperations
826	Expense of restructuring activities	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseOfRestructuringActivities
827	2425403 - Disclosure - Income taxes - Factors affecting the taxation charge for the year (Details)	Network	*	*	http://www.luxfer.com/role/IncomeTaxesFactorsAffectingTaxationChargeForYearDetails
828	Implied Table	Table	*	*	implied:Table
829	Income Taxes [Abstract]	Abstract			lxfr:IncomeTaxesAbstract
830	Standard corporate tax rate	Concept (Percent)	For Period		ifrs-full:ApplicableTaxRate
831	Profit on operations before taxation	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
832	Profit on operations at 2017 standard rate of corporation tax in the U.K. of 19.25% (2016: 20% and 2015: 20.25%)	Concept (Monetary)	For Period	Debit	ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
833	(Income not taxable) / non-deductible expenses	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
834	Unprovided deferred income taxes	Concept (Monetary)	For Period	Credit	lxfr:TaxEffectOfUnprovidedDeferredIncomeTaxes
835	Foreign tax rate differences	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectOfForeignTaxRates
836	Effect of U.S. tax reform	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectFromChangeInTaxRate
837	Adjustment in respect of previous years	Concept (Monetary)	For Period	Debit	lxfr:TaxEffectOfAdjustmentsForCurrentTaxOfPriorPeriods
838	Tax on profit on operations	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
839	Deferred tax credit from US tax reform	Concept (Monetary)	For Period	Debit	lxfr:TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit
840	2425404 - Disclosure - Income taxes - Factors that may affect future taxation charge (Details)	Network	*	*	http://www.luxfer.com/role/IncomeTaxesFactorsThatMayAffectFutureTaxationChargeDetails
841	Disclosure of temporary difference, unused tax losses and unused tax credits [table]	Table	*	*	ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
842	Non-adjusting events after reporting period [axis]	Axis			ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
843	Non-adjusting events after reporting period [member]	Member			ifrs-full:NonadjustingEventsMember
844	Changes in tax rates or tax laws enacted or announced	Member			ifrs-full:ChangesInTaxRatesOrTaxLawsEnactedOrAnnouncedMember
845	Income Tax Authority1 [Axis]	Axis			lxfr:IncomeTaxAuthority1Axis
846	Income Tax Authority1 [Domain]	Member			lxfr:IncomeTaxAuthority1Domain
847	U.K.	Member			lxfr:DomesticCountry1Member
848	Non-U.K.	Member			lxfr:ForeignCountry1Member
849	Temporary difference, unused tax losses and unused tax credits [axis]	Axis			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
850	Temporary difference, unused tax losses and unused tax credits [member]	Member			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
851	Certain trading and capital losses and other temporary timing difference	Member			lxfr:TemporaryDifferenceTradingLossesCapitalLossesAndOtherTimingDifferencesMember
852	Disclosure of temporary difference, unused tax losses and unused tax credits [line items]	LineItems			ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
853	Unused tax losses for which no deferred tax asset recognised	Concept (Monetary)	As Of		ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
854	Standard corporate tax rate	Concept (Percent)	For Period		ifrs-full:ApplicableTaxRate
855	2428402 - Disclosure - Earnings per share (Details)	Network	*	*	http://www.luxfer.com/role/EarningsPerShareDetails
856	Implied Table	Table	*	*	implied:Table
857	Earnings per share [abstract]	Abstract			ifrs-full:EarningsPerShareAbstract
858	Par value per share (in GBP per share)	Concept (Share)	As Of		ifrs-full:ParValuePerShare
859	Basic earnings:	Abstract			ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityAbstract
860	Net income	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
861	Adjusted earnings:	Abstract			lxfr:AdjustedEarningsAbstract
862	Accounting charges relating to acquisitions and disposals of businesses	Abstract			lxfr:AccountingChargesRelatingToAcquisitionsAndDisposalsOfBusinessesAbstract
863	Unwind of discount on deferred contingent consideration from acquisitions	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseDueToUnwindingOfDiscountOnProvisions
864	Acquisitions and disposals (Note 5)	Concept (Monetary)	For Period	Credit	lxfr:NonoperatingIncomeExpenseAcquisitionAndDisposals
865	Amortization on acquired intangibles	Concept (Monetary)	For Period		ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
866	IAS 19R retirement benefits finance charge	Concept (Monetary)	For Period	Debit	lxfr:IAS19RRetirementBenefitsFinanceCharge
867	Profit on sale of redundant site (Note 5)	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnDisposalsOfNoncurrentAssets
868	Changes to defined benefit pension plans (Note 5)	Concept (Monetary)	For Period	Credit	lxfr:ProfitLossFromOperatingActivitiesChangesToDefinedBenefitPensionPlan
869	Restructuring and other expense (Note 5)	Concept (Monetary)	For Period	Debit	lxfr:ExpenseOfRestructuringActivitiesAndOther
870	Other share based compensation charges	Concept (Monetary)	For Period	Debit	lxfr:OtherShareBasedCompensationCharges
871	Impact from U.S. tax reform	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectFromChangeInTaxRate
872	Income tax thereon	Concept (Monetary)	For Period	Debit	lxfr:TaxesOnEarningsAdjustmentItems
873	Adjusted net income	Concept (Monetary)	For Period	Credit	lxfr:AdjustedNetIncomeLoss
874	Weighted average number of �0.50 ordinary shares:	Abstract			ifrs-full:WeightedAverageSharesAndAdjustedWeightedAverageSharesAbstract
875	For basic earnings per share (in shares)	Concept (Shares)	For Period		ifrs-full:WeightedAverageShares
876	Exercise of share options (in shares)	Concept (Shares)	For Period		ifrs-full:DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares
877	For diluted earnings per share (in shares)	Concept (Shares)	For Period		ifrs-full:AdjustedWeightedAverageShares
878	Basic	Abstract			ifrs-full:BasicEarningsPerShareAbstract
879	Adjusted (in USD per share)	Concept (Share)	For Period		lxfr:BasicEarningsLossPerShareAdjusted
880	Unadjusted (in USD per share)	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShare
881	Diluted	Abstract			ifrs-full:DilutedEarningsPerShareAbstract
882	Adjusted (in USD per share)	Concept (Share)	For Period		lxfr:DilutedEarningsLossPerShareAdjusted
883	Unadjusted (in USD per share)	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShare
884	2431402 - Disclosure - Property, plant and equipment (Details)	Network	*	*	http://www.luxfer.com/role/PropertyPlantAndEquipmentDetails
885	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
886	Segments [axis]	Axis			ifrs-full:SegmentsAxis
887	Segments [member]	Member			ifrs-full:SegmentsMember
888	Luxfer Czech Republic Operating Segment	Member			lxfr:LuxferCzechRepublicOperatingSegmentMember
889	Luxfer Magtech operations	Member			lxfr:LuxferMagtechMember
890	Operating segments	Member			ifrs-full:OperatingSegmentsMember
891	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
892	Property, plant and equipment [member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
893	Freehold	Member			ifrs-full:BuildingsMember
894	Long leasehold	Member			lxfr:LongLeaseholdMember
895	Short leasehold	Member			lxfr:ShortLeaseholdMember
896	Plant and equipment	Member			lxfr:MachineryFixturesandFittingsMember
897	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
898	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
899	Cost	Member			ifrs-full:GrossCarryingAmountMember
900	Accumulated depreciation, amortisation and impairment	Member			ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
901	Disclosure of detailed information about property, plant and equipment [line items]	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
902	Reconciliation of changes in property, plant and equipment [abstract]	Abstract			ifrs-full:ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract
903	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
904	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
905	Acquired via acquisition	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment
906	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsPropertyPlantAndEquipment
907	Impairment	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
908	Transfers	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughTransfersFromConstructionInProgressPropertyPlantAndEquipment
909	Exchange difference	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
910	Provided during the year	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationExpense
911	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
912	Assets under finance leases	Concept (Monetary)	As Of	Debit	ifrs-full:RecognisedFinanceLeaseAsAssets
913	2434402 - Disclosure - Intangible assets (Details)	Network	*	*	http://www.luxfer.com/role/IntangibleAssetsDetails
914	Disclosure of detailed information about intangible assets [table]	Table	*	*	ifrs-full:DisclosureOfIntangibleAssetsTable
915	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
916	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
917	Cost	Member			ifrs-full:GrossCarryingAmountMember
918	Accumulated depreciation, amortisation and impairment	Member			ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
919	Classes of intangible assets and goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
920	Intangible assets and goodwill [member]	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
921	Goodwill	Member			ifrs-full:GoodwillMember
922	Customer related	Member			ifrs-full:CustomerrelatedIntangibleAssetsMember
923	Technology and trading related	Member			lxfr:TechnologyAndTradingRelatedMember
924	Development costs	Member			ifrs-full:CapitalisedDevelopmentExpenditureMember
925	Software	Member			ifrs-full:ComputerSoftwareMember
926	Methods of generation [axis]	Axis			ifrs-full:MethodsOfGenerationAxis
927	Methods of generation [member]	Member			ifrs-full:MethodsOfGenerationMember
928	Internally generated	Member			ifrs-full:InternallyGeneratedMember
929	Disclosure of detailed information about intangible assets [line items]	LineItems			ifrs-full:DisclosureOfIntangibleAssetsLineItems
930	Disclosure of reconciliation of changes in intangible assets and goodwill [abstract]	Abstract			ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillAbstract
931	Intangible assets and goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
932	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill
933	Provided during the year	Concept (Monetary)	For Period	Debit	ifrs-full:AmortisationExpense
934	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsIntangibleAssetsAndGoodwill
935	Impairment	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsAndGoodwill
936	Exchange difference	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill
937	Intangible assets and goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
938	2437402 - Disclosure - Impairment of goodwill - Movement in Goodwill (Details)	Network	*	*	http://www.luxfer.com/role/ImpairmentOfGoodwillMovementInGoodwillDetails
939	Disclosure of reconciliation of changes in goodwill [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillTable
940	Segments [axis]	Axis			ifrs-full:SegmentsAxis
941	Segments [member]	Member			ifrs-full:SegmentsMember
942	Gas Cylinders	Member			lxfr:GasCylindersDivisionMember
943	Elektron	Member			lxfr:ElektronDivisionMember
944	Disclosure of reconciliation of changes in goodwill [line items]	LineItems			ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillLineItems
945	Reconciliation of changes in goodwill [abstract]	Abstract			ifrs-full:ReconciliationOfChangesInGoodwillAbstract
946	Goodwill, beginning balance	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
947	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionalRecognitionGoodwill
948	Exchange difference	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesGoodwill
949	Goodwill, ending balance	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
950	2437403 - Disclosure - Impairment of goodwill - Narrative (Details)	Network	*	*	http://www.luxfer.com/role/ImpairmentOfGoodwillNarrativeDetails
951	Disclosure of impairment loss recognised or reversed [table]	Table	*	*	ifrs-full:DisclosureOfImpairmentLossRecognisedOrReversedTable
952	Segments [axis]	Axis			ifrs-full:SegmentsAxis
953	Segments [member]	Member			ifrs-full:SegmentsMember
954	Gas Cylinders	Member			lxfr:GasCylindersDivisionMember
955	Elektron	Member			lxfr:ElektronDivisionMember
956	Luxfer MEI Technologies operations	Member			lxfr:LuxferMEITechnologiesOperationsMember
957	Luxfer Magtech operations	Member			lxfr:LuxferMagtechMember
958	Magnesium Elektron operations	Member			lxfr:MagnesiumElektronMember
959	Individual assets or cash-generating units [axis]	Axis			ifrs-full:IndividualAssetsOrCashgeneratingUnitsAxis
960	Entity's total for individual assets or cash-generating units [member]	Member			ifrs-full:EntitysTotalForIndividualAssetsOrCashgeneratingUnitsMember
961	Luxfer Gas Cylinders	Member			lxfr:LuxferGasCylindersMember
962	Superform	Member			lxfr:SuperformMember
963	MEL Chemicals	Member			lxfr:MELChemicalsMember
964	Magnesium Elektron operations	Member			lxfr:MagnesiumElektronMember
965	Range [axis]	Axis			ifrs-full:RangeAxis
966	Ranges [member]	Member			ifrs-full:RangesMember
967	Minimum	Member			ifrs-full:BottomOfRangeMember
968	Maximum	Member			ifrs-full:TopOfRangeMember
969	Disclosure of impairment loss recognised or reversed [line items]	LineItems			ifrs-full:DisclosureOfImpairmentLossRecognisedOrReversedLineItems
970	Number of cash generating units	Concept (Integer)	For Period		lxfr:NumberOfCashGeneratingUnits
971	Number of reportable segments	Concept (Integer)	For Period		lxfr:NumberOfReportableSegments1
972	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
973	Period over which management has projected cash flows	Concept (xbrli:durationItemType)	For Period		lxfr:PeriodOverWhichManagementHasProjectedCashFlows
974	Growth rate used to extrapolate cash flow projections	Concept (Percent)	As Of		ifrs-full:DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections
975	Discount rate applied to cash flow projections	Concept (Percent)	As Of		ifrs-full:DescriptionOfDiscountRatesAppliedToCashFlowProjections
976	Exchange rate applied to cash flow projections (in USD per GBP and EUR per USD)	Concept (Decimal)	As Of		lxfr:ExchangeRateAppliedToCashFlowProjections
977	Impairment	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill
978	2440402 - Disclosure - Investments - Rollforward of Investments in Joint Ventures and Associates (Details)	Network	*	*	http://www.luxfer.com/role/InvestmentsRollforwardOfInvestmentsInJointVenturesAndAssociatesDetails
979	Disclosure of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsTable
980	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
981	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
982	Equity investments	Member			ifrs-full:EquityInvestmentsMember
983	Loan Investments	Member			ifrs-full:CorporateLoansMember
984	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
985	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
986	Joint Ventures	Member			ifrs-full:JointVenturesMember
987	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
988	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
989	Associates	Member			ifrs-full:AssociatesMember
990	Disclosure of financial assets [line items]	LineItems			ifrs-full:DisclosureOfFinancialAssetsLineItems
991	Beginning balance	Concept (Monetary)	As Of	Debit	lxfr:Investmentsinsubsidiariesjointventuresandassociatesandcurrentinvestments
992	Debt funding	Concept (Monetary)	For Period	Credit	ifrs-full:CashAdvancesAndLoansMadeToRelatedParties
993	Transfer from trade receivables	Concept (Monetary)	For Period	Debit	lxfr:InvestmentsInSubsidiariesJointVenturesAndAssociatesIncreaseFromTransferofTradeReceivables
994	Share of results	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
995	Impairment	Concept (Monetary)	For Period	Debit	lxfr:InvestmentsinsubsidiariesjointventuresandassociatesImpairmentLoss
996	Ending balance	Concept (Monetary)	As Of	Debit	lxfr:Investmentsinsubsidiariesjointventuresandassociatesandcurrentinvestments
997	Exchange differences on translation [abstract]	Abstract			ifrs-full:ExchangeDifferencesOnTranslationAbstract
998	Increase (decrease) through foreign exchange, financial assets	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughForeignExchangeFinancialAssets
999	2440403 - Disclosure - Investments - Schedule of Investment In Joint Ventures and Associates (Details)	Network	*	*	http://www.luxfer.com/role/InvestmentsScheduleOfInvestmentInJointVenturesAndAssociatesDetails
1000	Disclosure of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsTable
1001	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1002	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1003	Dynetek Cylinders India Private Limited	Member			lxfr:DynetekCylindersIndiaPrivateLimitedMember
1004	Dynetek Korea Co. Limited	Member			lxfr:DynetekKoreaCo.LimitedMember
1005	Luxfer Holdings NA, LLC	Member			lxfr:LuxferHoldingsNALLCMember
1006	Luxfer Uttam India Private Limited	Member			lxfr:LuxferUttamIndiaPrivateLimitedMember
1007	Nikkei-MEL Co. Limited	Member			lxfr:NikkeiMELCo.LimitedMember
1008	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
1009	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
1010	Sub161 Pty Limited	Member			lxfr:Sub161PtyLimitedMember
1011	Disclosure of financial assets [line items]	LineItems			ifrs-full:DisclosureOfFinancialAssetsLineItems
1012	Increase (decrease) through net exchange differences, other provisions	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions
1013	Proportion of voting rights and shares held	Concept (Percent)	For Period		ifrs-full:ProportionOfVotingRightsHeldInJointVenture
1014	Proportion of voting rights and shares held	Concept (Percent)	For Period		ifrs-full:ProportionOfVotingPowerHeldInAssociate
1015	2440404 - Disclosure - Investments - Additional Information (Details)	Network	*	*	http://www.luxfer.com/role/InvestmentsAdditionalInformationDetails
1016	Disclosure of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsTable
1017	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
1018	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
1019	Sub161 Pty Limited	Member			lxfr:Sub161PtyLimitedMember
1020	Associates	Member			ifrs-full:AssociatesMember
1021	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1022	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1023	Joint Ventures	Member			ifrs-full:JointVenturesMember
1024	Luxfer Holdings NA, LLC	Member			lxfr:LuxferHoldingsNALLCMember
1025	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
1026	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
1027	Loan Investments	Member			ifrs-full:CorporateLoansMember
1028	Equity investments	Member			ifrs-full:EquityInvestmentsMember
1029	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
1030	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
1031	Dynetek Industries	Member			lxfr:DynetekIndustriesMember
1032	Disclosure of financial assets [line items]	LineItems			ifrs-full:DisclosureOfFinancialAssetsLineItems
1033	Investments	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInSubsidiariesJointVenturesAndAssociates
1034	Borrowings, interest rate	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
1035	Proportion of voting rights and shares held	Concept (Percent)	For Period		ifrs-full:ProportionOfVotingPowerHeldInAssociate
1036	Cash transferred	Concept (Monetary)	As Of	Credit	ifrs-full:CashTransferred
1037	Other tangible or intangible assets transferred	Concept (Monetary)	As Of	Credit	ifrs-full:OtherTangibleOrIntangibleAssetsTransferred
1038	Investment impairment	Concept (Monetary)	For Period	Debit	lxfr:InvestmentsinsubsidiariesjointventuresandassociatesImpairmentLoss
1039	Carrying value of investments based on net realizable value of assets secured	Concept (Monetary)	As Of	Debit	lxfr:InvestmentsInSubsidiariesJointVenturesAndAssociatesBasedOnNetRealizableValueOfAssetsSecured
1040	Commitments in relation to joint ventures	Concept (Monetary)	As Of	Credit	ifrs-full:CommitmentsInRelationToJointVentures
1041	Commitments in relation to joint ventures, equity	Concept (Monetary)	As Of	Credit	lxfr:CommitmentsInRelationToJointVenturesEquity
1042	Line of credit facility, maximum borrowing capacity	Concept (Monetary)	As Of	Credit	lxfr:LineOfCreditFacilityMaximumBorrowingCapacity1
1043	Draws on line of credit facility	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
1044	Share of results of joint ventures and associates	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1045	Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1046	Increase (decrease) through net exchange differences, other provisions	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions
1047	2443402 - Disclosure - Inventories (Details)	Network	*	*	http://www.luxfer.com/role/InventoriesDetails
1048	Implied Table	Table	*	*	implied:Table
1049	Classes of current inventories [abstract]	Abstract			ifrs-full:ClassesOfInventoriesAbstract
1050	Raw materials and consumables	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentRawMaterialsAndCurrentProductionSupplies
1051	Work in progress	Concept (Monetary)	As Of	Debit	ifrs-full:WorkInProgress
1052	Finished goods and goods for resale	Concept (Monetary)	As Of	Debit	ifrs-full:FinishedGoods
1053	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
1054	Provision for obsolete and excess inventories	Concept (Monetary)	As Of	Credit	lxfr:ProvisionForObsoleteAndExcessInventories
1055	Cost of inventories recognized as expense	Concept (Monetary)	For Period	Debit	ifrs-full:CostOfInventoriesRecognisedAsExpenseDuringPeriod
1056	Inventory written-off	Concept (Monetary)	For Period		ifrs-full:InventoryWritedown2011
1057	2446402 - Disclosure - Trade and other receivables - Schedule of trade and other receivables (Details)	Network	*	*	http://www.luxfer.com/role/TradeAndOtherReceivablesScheduleOfTradeAndOtherReceivablesDetails
1058	Implied Table	Table	*	*	implied:Table
1059	Trade and other receivables [abstract]	Abstract			ifrs-full:TradeAndOtherReceivablesAbstract
1060	Non-current Assets	Abstract			ifrs-full:NoncurrentReceivablesAbstract
1061	Derivative financial instruments	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentDerivativeFinancialAssets
1062	Non-current trade and other receivables	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentReceivables
1063	Current Assets	Abstract			ifrs-full:TradeAndOtherCurrentReceivablesAbstract
1064	Trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
1065	Amounts owed by joint ventures and associates	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties
1066	Other receivables	Concept (Monetary)	As Of	Debit	ifrs-full:OtherReceivables
1067	Prepayments and accrued income	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentPrepaymentsAndCurrentAccruedIncome
1068	Derivative financial instruments	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentDerivativeFinancialAssets
1069	Current trade and other receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivables
1070	2446403 - Disclosure - Trade and other receivables - Additional Information (Details)	Network	*	*	http://www.luxfer.com/role/TradeAndOtherReceivablesAdditionalInformationDetails
1071	Trade And Other Receivables [Table]	Table	*	*	lxfr:TradeAndOtherReceivablesTable
1072	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
1073	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
1074	Sub161 Pty Limited	Member			lxfr:Sub161PtyLimitedMember
1075	Range [axis]	Axis			ifrs-full:RangeAxis
1076	Ranges [member]	Member			ifrs-full:RangesMember
1077	Minimum	Member			ifrs-full:BottomOfRangeMember
1078	Maximum	Member			ifrs-full:TopOfRangeMember
1079	Trade And Other Receivable [Line Items]	LineItems			lxfr:TradeAndOtherReceivableLineItems
1080	Trade receivables, term	Concept (xbrli:durationItemType)	For Period		lxfr:TradeReceivablesTerm
1081	Loan converted into secured loan note	Concept (Monetary)	For Period	Debit	lxfr:LoanConvertedIntoSecuredLoanNote
1082	2446404 - Disclosure - Trade and other receivables - Schedule of movement in provision for trade receivable (Details)	Network	*	*	http://www.luxfer.com/role/TradeAndOtherReceivablesScheduleOfMovementInProvisionForTradeReceivableDetails
1083	Trade And Other Receivables [Table]	Table	*	*	lxfr:TradeAndOtherReceivablesTable
1084	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
1085	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
1086	Trade receivables	Member			ifrs-full:TradeReceivablesMember
1087	Trade And Other Receivable [Line Items]	LineItems			lxfr:TradeAndOtherReceivableLineItems
1088	At January 1	Concept (Monetary)	As Of	Credit	ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1089	Charge in the year	Concept (Monetary)	For Period		ifrs-full:AdditionalAllowanceRecognisedInProfitOrLossAllowanceAccountForCreditLossesOfFinancialAssets
1090	Utilized in the year	Concept (Monetary)	For Period	Debit	ifrs-full:UtilisationAllowanceAccountForCreditLossesOfFinancialAssets
1091	Exchange difference	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesAllowanceAccountForCreditLossesOfFinancialAssets
1092	At December 31	Concept (Monetary)	As Of	Credit	ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1093	2449402 - Disclosure - Cash and cash equivalents (Details)	Network	*	*	http://www.luxfer.com/role/CashAndCashEquivalentsDetails
1094	Implied Table	Table	*	*	implied:Table
1095	Cash and cash equivalents [abstract]	Abstract			ifrs-full:CashAndCashEquivalentsAbstract
1096	Cash at bank and in hand	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
1097	Overdrafts	Concept (Monetary)	As Of	Credit	ifrs-full:BankOverdraftsClassifiedAsCashEquivalents
1098	Cash, net	Concept (Monetary)	As Of	Debit	lxfr:CashAndCashEquivalentsNet
1099	Cash held in escrow	Concept (Monetary)	As Of	Debit	lxfr:CashHeldInEscrow
1100	2452402 - Disclosure - Share capital - Ordinary share capital (Details)	Network	*	*	http://www.luxfer.com/role/ShareCapitalOrdinaryShareCapitalDetails
1101	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
1102	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
1103	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
1104	Ordinary shares	Member			ifrs-full:OrdinarySharesMember
1105	Deferred shares	Member			lxfr:DeferredSharesMember
1106	Disclosure of classes of share capital [line items]	LineItems			ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1107	Number of shares authorized	Concept (Shares)	As Of		ifrs-full:NumberOfSharesAuthorised
1108	Number of shares alloted, called up and fully paid	Concept (Shares)	As Of		ifrs-full:NumberOfSharesIssuedAndFullyPaid
1109	Shares authorized, value	Concept (Monetary)	As Of	Credit	lxfr:SharesAuthorizedValue
1110	Shares alloted, called up and fully paid, value	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
1111	Closing foreign exchange rate	Concept (Decimal)	As Of		ifrs-full:ClosingForeignExchangeRate
1112	Number of shares issued	Concept (Shares)	For Period		ifrs-full:IncreaseDecreaseInNumberOfOrdinarySharesIssued
1113	Par value per share (in GBP per share)	Concept (Share)	As Of		ifrs-full:ParValuePerShare
1114	Number of shares outstanding	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
1115	Multiple of amount paid up on ordinary shares	Concept (Pure)	For Period		lxfr:MultipleOfAmountPaidUpOnOrdinaryShares
1116	2452403 - Disclosure - Share capital - American Depositary Shares (Details)	Network	*	*	http://www.luxfer.com/role/ShareCapitalAmericanDepositarySharesDetails
1117	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
1118	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
1119	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
1120	Ordinary shares	Member			ifrs-full:OrdinarySharesMember
1121	Disclosure of classes of share capital [line items]	LineItems			ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1122	Number of American Depositary Shares outstanding	Concept (Integer)	As Of		lxfr:NumberOfAmericanDepositarySharesOutstanding
1123	Par value per share (in GBP per share)	Concept (Share)	As Of		ifrs-full:ParValuePerShare
1124	2452404 - Disclosure - Share capital - Share premium account (Details)	Network	*	*	http://www.luxfer.com/role/ShareCapitalSharePremiumAccountDetails
1125	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
1126	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
1127	Equity [member]	Member			ifrs-full:EquityMember
1128	Share premium	Member			ifrs-full:SharePremiumMember
1129	Disclosure of classes of share capital [line items]	LineItems			ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1130	Equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1131	2452405 - Disclosure - Share capital - Treasury shares (Details)	Network	*	*	http://www.luxfer.com/role/ShareCapitalTreasurySharesDetails
1132	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
1133	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
1134	Equity [member]	Member			ifrs-full:EquityMember
1135	Treasury shares	Member			ifrs-full:TreasurySharesMember
1136	Disclosure of classes of share capital [line items]	LineItems			ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1137	Beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1138	Purchase of own shares	Concept (Monetary)	For Period	Debit	ifrs-full:PurchaseOfTreasuryShares
1139	Utilization of treasury shares	Concept (Monetary)	For Period	Credit	ifrs-full:SaleOrIssueOfTreasuryShares
1140	Ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1141	Authorized stock repurchase amount	Concept (Monetary)	As Of	Credit	lxfr:StockRepurchaseProgramAuthorizedAmount
1142	Authorized stock repurchase, number of shares	Concept (Shares)	As Of		lxfr:StockRepurchaseProgramAuthorizedNumberOfShares
1143	Number of shares repurchased	Concept (Shares)	For Period		ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding
1144	Number of treasury shares held	Concept (Shares)	As Of		ifrs-full:SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates
1145	2452406 - Disclosure - Share capital - Own shares held by ESOP (Details)	Network	*	*	http://www.luxfer.com/role/ShareCapitalOwnSharesHeldByEsopDetails
1146	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
1147	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
1148	Equity [member]	Member			ifrs-full:EquityMember
1149	Own shares held by ESOP	Member			lxfr:OwnSharesHeldByEmployeeStockOwnershipPlanMember
1150	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
1151	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
1152	Ordinary shares	Member			ifrs-full:OrdinarySharesMember
1153	Disclosure of classes of share capital [line items]	LineItems			ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1154	Beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1155	Purchase of shares from ESOP	Concept (Monetary)	For Period	Credit	lxfr:PurchaseOfSharesFromIntoEmployeeStockOwnershipPlan
1156	Exchange movement on ESOP	Concept (Monetary)	For Period	Credit	lxfr:ExchangeMovementOnEmployeeStockOwnershipPlan
1157	Utilization of shares from ESOP	Concept (Monetary)	For Period	Credit	lxfr:UtilizationOfSharesFromEmployeeStockOwnershipPlan
1158	Ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1159	Number of treasury shares held	Concept (Shares)	As Of		ifrs-full:SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates
1160	Par value per share (in GBP per share)	Concept (Share)	As Of		ifrs-full:ParValuePerShare
1161	2455402 - Disclosure - Dividends paid and proposed (Details)	Network	*	*	http://www.luxfer.com/role/DividendsPaidAndProposedDetails
1162	Disclosure of non-adjusting events after reporting period [table]	Table	*	*	ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodTable
1163	Non-adjusting events after reporting period [axis]	Axis			ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
1164	Non-adjusting events after reporting period [member]	Member			ifrs-full:NonadjustingEventsMember
1165	Dividends	Member			lxfr:DividendsMember
1166	Disclosure of non-adjusting events after reporting period [line items]	LineItems			ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
1167	Dividends declared and paid during the year	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsPaid
1168	Dividends declared and paid during the year (USD per share)	Concept (Share)	For Period		ifrs-full:DividendsRecognisedAsDistributionsToOwnersPerShare
1169	Stock split, conversion ratio	Concept (Pure)	As Of		lxfr:StockSplitConversionRatio
1170	2458402 - Disclosure - Reserves - Movement in Reserves (Details)	Network	*	*	http://www.luxfer.com/role/ReservesMovementInReservesDetails
1171	Disclosure of reserves within equity [table]	Table	*	*	ifrs-full:DisclosureOfReservesWithinEquityTable
1172	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
1173	Equity [member]	Member			ifrs-full:EquityMember
1174	Retained earnings	Member			ifrs-full:RetainedEarningsMember
1175	Reserves within equity [axis]	Axis			ifrs-full:ReservesWithinEquityAxis
1176	Other reserves	Member			ifrs-full:OtherReservesMember
1177	Hedging reserve	Member			ifrs-full:ReserveOfGainsAndLossesOnHedgingInstrumentsThatHedgeInvestmentsInEquityInstrumentsMember
1178	Translation reserve	Member			ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
1179	Share based compensation reserve	Member			ifrs-full:ReserveOfSharebasedPaymentsMember
1180	Merger reserve	Member			ifrs-full:MergerReserveMember
1181	Disclosure of reserves within equity [line items]	LineItems			ifrs-full:DisclosureOfReservesWithinEquityLineItems
1182	Beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1183	Net income for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
1184	Currency translation differences	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
1185	Increase in fair value of cash flow hedges	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnCashFlowHedgesNetOfTax
1186	Transfer to consolidated income statement on cash flow hedges	Concept (Monetary)	For Period	Debit	ifrs-full:ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax
1187	Remeasurement of defined benefit retirement plans	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
1188	Deferred income taxes on items taken to other comprehensive income	Concept (Monetary)	For Period	Credit	lxfr:DeferredIncomeTaxesOnItemsTakenToOtherComprehensiveIncomeEquity
1189	Equity dividends	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsPaid
1190	Equity settled share based compensation charges	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
1191	Cash settled share based compensation charges	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromCashsettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets
1192	Deferred income taxes on items taken to equity	Concept (Monetary)	For Period		ifrs-full:DeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity
1193	Utilization of treasury shares	Concept (Monetary)	For Period	Credit	ifrs-full:SaleOrIssueOfTreasuryShares
1194	Utilization of ESOP shares	Concept (Monetary)	For Period	Credit	lxfr:UtilizationOfSharesFromEmployeeStockOwnershipPlan
1195	Ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1196	2458403 - Disclosure - Reserves - Narrative (Details)	Network	*	*	http://www.luxfer.com/role/ReservesNarrativeDetails
1197	Disclosure of reserves within equity [table]	Table	*	*	ifrs-full:DisclosureOfReservesWithinEquityTable
1198	Reserves within equity [axis]	Axis			ifrs-full:ReservesWithinEquityAxis
1199	Other reserves	Member			ifrs-full:OtherReservesMember
1200	Hedging reserve	Member			ifrs-full:ReserveOfGainsAndLossesOnHedgingInstrumentsThatHedgeInvestmentsInEquityInstrumentsMember
1201	Share based compensation reserve	Member			ifrs-full:ReserveOfSharebasedPaymentsMember
1202	Disclosure of reserves within equity [line items]	LineItems			ifrs-full:DisclosureOfReservesWithinEquityLineItems
1203	Increase (decrease) in equity	Concept (Monetary)	For Period	Credit	ifrs-full:ChangesInEquity
1204	Gains (losses) on cash flow hedges, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnCashFlowHedgesNetOfTax
1205	Transfer (gains) losses to consolidated income statement on cash flow hedges	Concept (Monetary)	For Period	Debit	ifrs-full:ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax
1206	Deferred income taxes on items taken to other comprehensive income	Concept (Monetary)	For Period	Credit	lxfr:DeferredIncomeTaxesOnItemsTakenToOtherComprehensiveIncomeEquity
1207	Number of shares purchased	Concept (Shares)	For Period		ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding
1208	2461402 - Disclosure - Bank and other loans - Schedule of bank and other loans (Details)	Network	*	*	http://www.luxfer.com/role/BankAndOtherLoansScheduleOfBankAndOtherLoansDetails
1209	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1210	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
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1212	Gross carrying amount	Member			ifrs-full:GrossCarryingAmountMember
1213	Unamortized finance costs	Member			lxfr:UnamortizedFinanceCostsMember
1214	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1215	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1216	Loan Notes due 2018	Member			lxfr:LoanNotesDue2018Member
1217	Loan Notes due 2021	Member			lxfr:LoanNotesDue2021Member
1218	Loan Notes due 2023	Member			lxfr:LoanNotesDue2023Member
1219	Loan Notes due 2026	Member			lxfr:LoanNotesDue2026Member
1220	Revolving credit facility	Member			lxfr:RevolvingCreditFacility1Member
1221	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1222	Bank and other loans	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
1223	Included in current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:ShorttermBorrowings
1224	Included in non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
1225	2461403 - Disclosure - Bank and other loans - Additional Information (Details)	Network	*	*	http://www.luxfer.com/role/BankAndOtherLoansAdditionalInformationDetails
1226	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1227	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1228	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1229	Senior Facilities Agreement [Member]	Member			lxfr:SeniorFacilitiesAgreementMember
1230	Senior Facilities Agreement, Accordion Feature [Member]	Member			lxfr:SeniorFacilitiesAgreementAccordionFeatureMember
1231	Loan Notes due 2018	Member			lxfr:LoanNotesDue2018Member
1232	Loan Notes due 2023	Member			lxfr:LoanNotesDue2023Member
1233	Loan Notes due 2026	Member			lxfr:LoanNotesDue2026Member
1234	Loan Notes due 2021	Member			lxfr:LoanNotesDue2021Member
1235	Revolving credit facility	Member			lxfr:RevolvingCreditFacility1Member
1236	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1237	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1238	Gross carrying amount	Member			ifrs-full:GrossCarryingAmountMember
1239	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1240	Notional amount	Concept (Monetary)	As Of		ifrs-full:NotionalAmount
1241	Finance costs	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
1242	Bank and other loans	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
1243	Borrowings, interest rate	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
1244	Borrowings, term	Concept (xbrli:durationItemType)	For Period		lxfr:BorrowingsTerm
1245	2464402 - Disclosure - Provisions - Movement in Provisions (Details)	Network	*	*	http://www.luxfer.com/role/ProvisionsMovementInProvisionsDetails
1246	Disclosure of other provisions [table]	Table	*	*	ifrs-full:DisclosureOfOtherProvisionsTable
1247	Classes of other provisions [axis]	Axis			ifrs-full:ClassesOfProvisionsAxis
1248	Other provisions [member]	Member			ifrs-full:OtherProvisionsMember
1249	Rationalization and redundancy	Member			ifrs-full:RestructuringProvisionMember
1250	Employee benefits	Member			lxfr:EmployeeBenefitsProvisionMember
1251	Environmental provisions	Member			ifrs-full:OtherEnvironmentRelatedProvisionMember
1252	Disclosure of other provisions [line items]	LineItems			ifrs-full:DisclosureOfOtherProvisionsLineItems
1253	Reconciliation of changes in other provisions [abstract]	Abstract			ifrs-full:ReconciliationOfChangesInOtherProvisionsAbstract
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1257	Cash payments	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions
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1259	Provisions, ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:Provisions
1260	Included in current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentProvisions
1261	Included in non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentProvisions
1262	2464403 - Disclosure - Provisions - Narrative (Details)	Network	*	*	http://www.luxfer.com/role/ProvisionsNarrativeDetails
1263	Disclosure of other provisions [table]	Table	*	*	ifrs-full:DisclosureOfOtherProvisionsTable
1264	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
1265	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
1266	Speciality Metals business of ESM Group Inc	Member			lxfr:SpecialityMetalsbusinessofESMGroupIncMember
1267	Classes of other provisions [axis]	Axis			ifrs-full:ClassesOfProvisionsAxis
1268	Other provisions [member]	Member			ifrs-full:OtherProvisionsMember
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1270	Rationalization of Magtech operations	Member			lxfr:RationalizationOfMagtechOperationsMember
1271	Onerous contracts provision	Member			ifrs-full:OnerousContractsProvisionMember
1272	Employee benefits	Member			lxfr:EmployeeBenefitsProvisionMember
1273	Environmental provisions	Member			ifrs-full:OtherEnvironmentRelatedProvisionMember
1274	Segments [axis]	Axis			ifrs-full:SegmentsAxis
1275	Segments [member]	Member			ifrs-full:SegmentsMember
1276	Gas Cylinders	Member			lxfr:GasCylindersDivisionMember
1277	Elektron	Member			lxfr:ElektronDivisionMember
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1279	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1280	United Kingdom	Member			country:GB
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1282	Disclosure of other provisions [line items]	LineItems			ifrs-full:DisclosureOfOtherProvisionsLineItems
1283	Provisions	Concept (Monetary)	As Of	Credit	ifrs-full:Provisions
1284	2467402 - Disclosure - Deferred income taxes - Reconciliation of changes in deferred tax liability (asset) (Details)	Network	*	*	http://www.luxfer.com/role/DeferredIncomeTaxesReconciliationOfChangesInDeferredTaxLiabilityAssetDetails
1285	Disclosure of temporary difference, unused tax losses and unused tax credits [table]	Table	*	*	ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
1286	Temporary difference, unused tax losses and unused tax credits [axis]	Axis			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1287	Temporary difference, unused tax losses and unused tax credits [member]	Member			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1288	Accelerated tax depreciation	Member			lxfr:AcceleratedTaxDepreciationMember
1289	Other temporary differences	Member			ifrs-full:OtherTemporaryDifferencesMember
1290	Tax losses	Member			ifrs-full:UnusedTaxLossesMember
1291	Retirement benefit obligations	Member			lxfr:RetirementBenefitObligationsMember
1292	Disclosure of temporary difference, unused tax losses and unused tax credits [line items]	LineItems			ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
1293	Reconciliation of changes in deferred tax liability (asset) [abstract]	Abstract			ifrs-full:ReconciliationOfChangesInDeferredTaxLiabilityAssetAbstract
1294	Deferred tax liability (asset), beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
1295	Credited/(charged) to consolidated income statement	Concept (Monetary)	For Period		ifrs-full:DeferredTaxExpenseIncomeRecognisedInProfitOrLoss
1296	Credited to other comprehensive income	Concept (Monetary)	For Period		ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
1297	Credited to equity	Concept (Monetary)	For Period		ifrs-full:DeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity
1298	Exchange difference	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset
1299	Deferred tax liability (asset), ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
1300	2467403 - Disclosure - Deferred income taxes - Components of deferred income tax assets and liabilities (Details)	Network	*	*	http://www.luxfer.com/role/DeferredIncomeTaxesComponentsOfDeferredIncomeTaxAssetsAndLiabilitiesDetails
1301	Implied Table	Table	*	*	implied:Table
1302	Disclosure Of Income Tax [Abstract]	Abstract			lxfr:DisclosureOfIncomeTaxAbstract
1303	Deferred income tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
1304	Deferred income tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
1305	Net deferred income tax assets	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
1306	2467404 - Disclosure - Deferred income taxes - Additional Information (Details)	Network	*	*	http://www.luxfer.com/role/DeferredIncomeTaxesAdditionalInformationDetails
1307	Disclosure of temporary difference, unused tax losses and unused tax credits [table]	Table	*	*	ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
1308	Tax Losses Carried Forward Period [Axis]	Axis			lxfr:TaxLossesCarriedForwardPeriodAxis
1309	Tax Losses Carried Forward Period [Domain]	Member			lxfr:TaxLossesCarriedForwardPeriodDomain
1310	Indefinite	Member			lxfr:IndefiniteMember
1311	Between 2028 and 2034	Member			lxfr:Between2028and2034Member
1312	Disclosure of temporary difference, unused tax losses and unused tax credits [line items]	LineItems			ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
1313	Deferred tax credit from US tax reform	Concept (Monetary)	For Period	Debit	lxfr:TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit
1314	Unrecognized deferred income tax assets for which no deferred tax asset is recognized	Concept (Monetary)	As Of		ifrs-full:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
1315	Unused tax losses for which no deferred tax asset recognised	Concept (Monetary)	As Of		ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
1316	Temporary differences of unremitted earnings of overseas subsidiaries and joint ventures and associates for which deferred tax liabilities have not been recognised	Concept (Monetary)	As Of		ifrs-full:TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesBranchesAndAssociatesAndInterestsInJointVentures
1317	2470402 - Disclosure - Trade and other payables (Details)	Network	*	*	http://www.luxfer.com/role/TradeAndOtherPayablesDetails
1318	Implied Table	Table	*	*	implied:Table
1319	Trade and other payables [abstract]	Abstract			ifrs-full:TradeAndOtherPayablesAbstract
1320	Non-current liabilities	Abstract			ifrs-full:NoncurrentLiabilitiesAbstract
1321	Accruals	Concept (Monetary)	As Of	Credit	ifrs-full:AccrualsClassifiedAsNoncurrent
1322	Derivative financial instruments	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentDerivativeFinancialLiabilities
1323	Non-current trade and other payables	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentPayables
1324	Current liabilities	Abstract			ifrs-full:CurrentLiabilitiesAbstract
1325	Trade payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
1326	Other taxation and social security	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax
1327	Accruals	Concept (Monetary)	As Of	Credit	ifrs-full:AccrualsClassifiedAsCurrent
1328	Interest payable	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentInterestPayable
1329	Derivative financial instruments	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentDerivativeFinancialLiabilities
1330	Current trade and other payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayables
1331	2473402 - Disclosure - Acquisitions (Details)	Network	*	*	http://www.luxfer.com/role/AcquisitionsDetails
1332	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
1333	Range [axis]	Axis			ifrs-full:RangeAxis
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1335	Maximum	Member			ifrs-full:TopOfRangeMember
1336	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
1337	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
1338	Speciality Metals business of ESM Group Inc	Member			lxfr:SpecialityMetalsbusinessofESMGroupIncMember
1339	Canland	Member			lxfr:CanlandUKLimitedMember
1340	Legal Entity [Axis]	Axis			dei:LegalEntityAxis
1341	Entity [Domain]	Member			dei:EntityDomain
1342	Luxfer Magtech	Member			lxfr:LuxferMagtechMember
1343	Disclosure of detailed information about business combination [line items]	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
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1345	Deferred consideration	Concept (Monetary)	As Of	Credit	lxfr:DeferredConsiderationCurrent
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1347	Net assets acquired	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
1348	Gain on bargain purchase	Concept (Monetary)	For Period	Credit	ifrs-full:GainRecognisedInBargainPurchaseTransaction
1349	Land and buildings recognized as of acquisition date	Concept (Monetary)	As Of	Debit	lxfr:LandAndBuildingsRecognizedAsofAcquisitionDate
1350	Plant and equipment recognised as of acquisition date	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
1351	Inventory recognised as of acquisition date	Concept (Monetary)	As Of	Debit	ifrs-full:InventoryRecognisedAsOfAcquisitionDate
1352	Liabilities assumed as of acquisition date	Concept (Monetary)	As Of	Credit	lxfr:LiabilitiesAssumedAsOfAcquisitionDate
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1371	2476402 - Disclosure - Commitments and contingencies (Details)	Network	*	*	http://www.luxfer.com/role/CommitmentsAndContingenciesDetails
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1392	2479402 - Disclosure - Financial risk management objectives and policies - Narrative (Details)	Network	*	*	http://www.luxfer.com/role/FinancialRiskManagementObjectivesAndPoliciesNarrativeDetails
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1443	Sensitivity analysis for reasonably possible change in exchange rate, increase (decrease) on adjusted EBITDA	Concept (Monetary)	For Period		lxfr:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnAdjustedEarningsBeforeInterestTaxesDepreciationAndAmorisation
1444	Capital employed	Concept (Monetary)	As Of	Credit	ifrs-full:CapitalReserve
1445	Closing foreign exchange rate (in GBP or EUR to USD)	Concept (Decimal)	As Of		ifrs-full:ClosingForeignExchangeRate
1446	Sensitivity analysis for reasonably possible change in exchange rate, increase (decrease) on capital employed	Concept (Monetary)	For Period		lxfr:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnCapitalReserve
1447	Risk exposure	Concept (Monetary)	As Of		ifrs-full:RiskExposureAssociatedWithInstrumentsSharingCharacteristic
1448	Foreign exchange transaction gain	Concept (Monetary)	For Period	Credit	ifrs-full:NetForeignExchangeGain
1449	Foreign exchange transaction loss	Concept (Monetary)	For Period	Debit	ifrs-full:NetForeignExchangeLoss
1450	Amount of commodity purchases (in metric tons)	Concept (num:massItemType)	For Period		lxfr:AmountOfCommodityPurchases
1451	Average rate of hedging instrument	Concept (Percent)	As Of		ifrs-full:AverageRateOfHedgingInstrument
1452	Sensitivity analysis for reasonably possible change in exchange rate, commodity price	Concept (Monetary)	For Period		lxfr:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePrice
1453	Sensitivity analysis for reasonably possible change in exchange rate, increase (decrease) on division costs	Concept (Monetary)	For Period		lxfr:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnCosts
1454	2479403 - Disclosure - Financial risk management objectives and policies - Maturity Profile of Financial Liabilities (Details)	Network	*	*	http://www.luxfer.com/role/FinancialRiskManagementObjectivesAndPoliciesMaturityProfileOfFinancialLiabilitiesDetails
1455	Disclosure of maturity analysis for non-derivative financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable
1456	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1457	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1458	Gross carrying amount	Member			ifrs-full:GrossCarryingAmountMember
1459	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1460	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1461	Within 12 months	Member			ifrs-full:NotLaterThanOneYearMember
1462	1-5 years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1463	In over five years	Member			ifrs-full:LaterThanFiveYearsMember
1464	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1465	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1466	Loan Notes due 2018	Member			lxfr:LoanNotesDue2018Member
1467	Loan Notes due 2021	Member			lxfr:LoanNotesDue2021Member
1468	Loan Notes due 2023	Member			lxfr:LoanNotesDue2023Member
1469	Loan Notes due 2026	Member			lxfr:LoanNotesDue2026Member
1470	Revolving credit facility	Member			lxfr:RevolvingCreditFacility1Member
1471	Disclosure of maturity analysis for non-derivative financial liabilities [line items]	LineItems			ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems
1472	Bank and other loans	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
1473	Deferred contingent consideration	Concept (Monetary)	As Of	Credit	lxfr:DeferredContingentConsiderationCurrentAndNonCurrent
1474	Deferred consideration	Concept (Monetary)	As Of	Credit	lxfr:DeferredConsiderationCurrent
1475	Trade payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayablesToTradeSuppliers
1476	Accruals	Concept (Monetary)	As Of	Credit	ifrs-full:Accruals
1477	Interest payable	Concept (Monetary)	As Of	Credit	ifrs-full:InterestPayable
1478	Derivative financial instruments	Concept (Monetary)	As Of	Credit	ifrs-full:DerivativeFinancialLiabilities
1479	Overdrafts	Concept (Monetary)	As Of	Credit	ifrs-full:BankOverdraftsClassifiedAsCashEquivalents
1480	Financial liabilities book value	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
1481	2479404 - Disclosure - Financial risk management objectives and policies - Maturity Profile of Contractual Undiscounted Payments (Details)	Network	*	*	http://www.luxfer.com/role/FinancialRiskManagementObjectivesAndPoliciesMaturityProfileOfContractualUndiscountedPaymentsDetails
1482	Disclosure of maturity analysis for non-derivative financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable
1483	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1484	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1485	Within 12 months	Member			ifrs-full:NotLaterThanOneYearMember
1486	1-5 years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1487	In over five years	Member			ifrs-full:LaterThanFiveYearsMember
1488	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1489	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1490	Gross carrying amount	Member			ifrs-full:GrossCarryingAmountMember
1491	Less: future finance charges	Member			lxfr:FutureFinanceChargesMember
1492	Disclosure of maturity analysis for non-derivative financial liabilities [line items]	LineItems			ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems
1493	Undiscounted contractual maturity of financial liabilities	Concept (Monetary)	As Of	Credit	lxfr:FinancialLiabilitiesUndiscountedCashFlows
1494	2479405 - Disclosure - Financial risk management objectives and policies - Reconciliation of Adjusted EBITDA (Details)	Network	*	*	http://www.luxfer.com/role/FinancialRiskManagementObjectivesAndPoliciesReconciliationOfAdjustedEbitdaDetails
1495	Implied Table	Table	*	*	implied:Table
1496	Financial Instruments [Abstract]	Abstract			lxfr:FinancialInstrumentsAbstract
1497	Operating profit	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromOperatingActivities
1498	Profit on sale of redundant site (Note 5)	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnDisposalsOfNoncurrentAssets
1499	Changes to defined benefit pension plans (Note 5)	Concept (Monetary)	For Period	Credit	lxfr:ProfitLossFromOperatingActivitiesChangesToDefinedBenefitPensionPlan
1500	Restructuring and other expense (Note 5)	Concept (Monetary)	For Period	Debit	lxfr:ExpenseOfRestructuringActivitiesAndOther
1501	Loss on disposal of property, plant and equipment	Concept (Monetary)	For Period	Debit	ifrs-full:LossesOnDisposalsOfPropertyPlantAndEquipment
1502	Other share based compensation charges	Concept (Monetary)	For Period	Debit	lxfr:OtherShareBasedCompensationCharges
1503	Depreciation and amortization	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationAndAmortisationExpense
1504	Adjusted EBITDA	Concept (Monetary)	For Period	Credit	lxfr:AdjustedEarningsBeforeInterestTaxDepreciationAndAmortisation
1505	Bank and other loans	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
1506	Less: Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
1507	Add: Overdrafts	Concept (Monetary)	As Of	Credit	ifrs-full:BankOverdraftsClassifiedAsCashEquivalents
1508	Add: Restricted cash	Concept (Monetary)	As Of	Debit	ifrs-full:RestrictedCashAndCashEquivalents
1509	Net debt	Concept (Monetary)	As Of	Credit	lxfr:BorrowingsExcludingCashAndCashEquivalents
1510	Net debt: Adjusted EBITDA ratio	Concept (Pure)	For Period		lxfr:AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortisationToNetDebtRatio
1511	2479406 - Disclosure - Financial risk management objectives and policies - Reconciliation of Net Debt (Details)	Network	*	*	http://www.luxfer.com/role/FinancialRiskManagementObjectivesAndPoliciesReconciliationOfNetDebtDetails
1512	Disclosure of maturity analysis for non-derivative financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable
1513	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
1514	Financial liabilities, class [member]	Member			ifrs-full:FinancialLiabilitiesMember
1515	Overdrafts	Member			lxfr:OverdraftsMember
1516	Bank and other loans due within one year	Member			lxfr:BankAndOtherLoansDueWithinOneYearMember
1517	Bank and other loans due after one year	Member			lxfr:BankAndOtherLoansDueAfterOneYearMember
1518	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
1519	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
1520	Cash at bank and in hand	Member			lxfr:CashAtBankAndInHandMember
1521	Disclosure of maturity analysis for non-derivative financial liabilities [line items]	LineItems			ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems
1522	Beginning balance	Concept (Monetary)	As Of	Credit	lxfr:BorrowingsExcludingCashAndCashEquivalents
1523	Cash flows	Concept (Monetary)	For Period	Debit	lxfr:BorrowingsExcludingCashAndCashEquivalentCashFlows
1524	Reclassification	Concept (Monetary)	For Period	Credit	lxfr:BorrowingsExcludingCashAndCashEquivalentReclassification
1525	Foreign exchange adjustments	Concept (Monetary)	For Period	Credit	lxfr:BorrowingsExcludingCashAndCashEquivalentForeignExchangeAdjustments
1526	Restricted cash	Concept (Monetary)	For Period	Debit	lxfr:BorrowingsExcludingCashAndCashEquivalentChangeOfRestrictedCash
1527	Other non-cash movements	Concept (Monetary)	For Period	Credit	lxfr:BorrowingsExcludingCashAndCashEquivalentOtherNonCashMovements
1528	Ending balance	Concept (Monetary)	As Of	Credit	lxfr:BorrowingsExcludingCashAndCashEquivalents
1529	2479407 - Disclosure - Financial risk management objectives and policies - Past Due Receivables (Details)	Network	*	*	http://www.luxfer.com/role/FinancialRiskManagementObjectivesAndPoliciesPastDueReceivablesDetails
1530	Disclosure of financial assets that are either past due or impaired [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedTable
1531	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
1532	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
1533	Trade receivables	Member			ifrs-full:TradeReceivablesMember
1534	Impairment of financial assets [axis]	Axis			ifrs-full:ImpairmentOfFinancialAssetsAxis
1535	Entity's total for impairment of financial assets [member]	Member			ifrs-full:EntitysTotalForImpairmentOfFinancialAssetsMember
1536	Neither past due nor impaired	Member			ifrs-full:FinancialAssetsNeitherPastDueNorImpairedMember
1537	Past due but not impaired	Member			ifrs-full:FinancialAssetsPastDueButNotImpairedMember
1538	Past due status [axis]	Axis			ifrs-full:PastDueStatusAxis
1539	Past due status [member]	Member			ifrs-full:PastDueStatusMember
1540	Current	Member			ifrs-full:CurrentMember
1541	Less than 31 days	Member			ifrs-full:NotLaterThanOneMonthMember
1542	31-60 days	Member			ifrs-full:LaterThanOneMonthAndNotLaterThanTwoMonthsMember
1543	61-90 days	Member			ifrs-full:LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember
1544	91-121 days	Member			ifrs-full:LaterThanThreeMonthsAndNotLaterThanFourMonthsMember
1545	Greater than 121 days	Member			ifrs-full:LaterThanFourMonthsMember
1546	Disclosure of financial assets that are either past due or impaired [line items]	LineItems			ifrs-full:DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedLineItems
1547	Book value	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
1548	2482402 - Disclosure - Financial instruments - Financial Assets and Liabilities (Details)	Network	*	*	http://www.luxfer.com/role/FinancialInstrumentsFinancialAssetsAndLiabilitiesDetails
1549	Disclosure of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsTable
1550	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
1551	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
1552	Cash at bank and in hand	Member			lxfr:CashAtBankAndInHandMember
1553	Disclosure of financial assets [line items]	LineItems			ifrs-full:DisclosureOfFinancialAssetsLineItems
1554	Book value	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
1555	Fair value	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValue
1556	2482402 - Disclosure - Financial instruments - Financial Assets and Liabilities (Details)	Network	*	*	http://www.luxfer.com/role/FinancialInstrumentsFinancialAssetsAndLiabilitiesDetails
1557	Disclosure of financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfFinancialLiabilitiesTable
1558	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
1559	Financial liabilities, class [member]	Member			ifrs-full:FinancialLiabilitiesMember
1560	Loan Notes due 2018	Member			lxfr:LoanNotesDue2018Member
1561	Loan Notes due 2021	Member			lxfr:LoanNotesDue2021Member
1562	Loan Notes due 2023	Member			lxfr:LoanNotesDue2023Member
1563	Loan Notes due 2026	Member			lxfr:LoanNotesDue2026Member
1564	Revolving credit facility	Member			lxfr:RevolvingCreditFacility1Member
1565	Overdrafts	Member			lxfr:BankOverdrafts1Member
1566	Deferred contingent consideration	Member			lxfr:DeferredContingentConsiderationMember
1567	Deferred consideration	Member			lxfr:DeferredConsiderationMember
1568	Disclosure of financial liabilities [line items]	LineItems			ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1569	Book value	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
1570	Fair value	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilitiesAtFairValue
1571	2482403 - Disclosure - Financial instruments - Narrative (Details)	Network	*	*	http://www.luxfer.com/role/FinancialInstrumentsNarrativeDetails
1572	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1573	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
1574	Financial liabilities, class [member]	Member			ifrs-full:FinancialLiabilitiesMember
1575	Bank and other loan notes	Member			lxfr:LoanNotesMember
1576	Currency 1 [Axis]	Axis			lxfr:Currency1Axis
1577	Currency 1 [Domain]	Member			lxfr:Currency1Domain
1578	USD	Member			currency:USD
1579	Types of interest rates [axis]	Axis			ifrs-full:TypesOfInterestRatesAxis
1580	Interest rate types [member]	Member			ifrs-full:InterestRateTypesMember
1581	Variable interest rate	Member			ifrs-full:FloatingInterestRateMember
1582	Hedging instruments [axis]	Axis			ifrs-full:HedgingInstrumentsAxis
1583	Hedging instruments [member]	Member			ifrs-full:HedgingInstrumentsMember
1584	Forward foreign currency exchange rate contracts	Member			ifrs-full:ForwardContractMember
1585	LME derivative contracts	Member			lxfr:LondonMetalExchangeDerivativeContractsMember
1586	Foreign currency translation risk disclosures	Member			ifrs-full:CurrencySwapContractMember
1587	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1588	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1589	Committed Banking Facilities	Member			lxfr:BankFacilitiesMember
1590	Letters of credit	Member			lxfr:LettersOfCreditMember
1591	Bonding Facility	Member			lxfr:BondingFacilityMember
1592	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1593	Book value	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
1594	Borrowing costs	Concept (Monetary)	For Period		ifrs-full:BorrowingCostsIncurred
1595	Cash held in escrow	Concept (Monetary)	As Of	Debit	lxfr:CashHeldInEscrow
1596	Contract totals	Concept (Decimal)	As Of		ifrs-full:NominalAmountOfHedgingInstrument
1597	Gain (loss) on hedge recognized in equity	Concept (Monetary)	For Period	Credit	ifrs-full:GainLossOnHedgeIneffectivenessRecognisedInOtherComprehensiveIncome
1598	Gain (loss) on hedge recognized in profit	Concept (Monetary)	For Period	Credit	ifrs-full:GainLossOnHedgeIneffectivenessRecognisedInProfitOrLoss
1599	Exchange differences on translation of foreign operations	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
1600	Line of credit facility, maximum borrowing capacity	Concept (Monetary)	As Of	Credit	lxfr:LineOfCreditFacilityMaximumBorrowingCapacity1
1601	Bank and other loans	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
1602	2482404 - Disclosure - Financial instruments - Derivative Financial Liabilities (Details)	Network	*	*	http://www.luxfer.com/role/FinancialInstrumentsDerivativeFinancialLiabilitiesDetails
1603	Disclosure of financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfFinancialLiabilitiesTable
1604	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
1605	Financial liabilities, class [member]	Member			ifrs-full:FinancialLiabilitiesMember
1606	Forward foreign currency exchange rate contracts	Member			ifrs-full:ForwardContractMember
1607	LME derivative contracts	Member			lxfr:LondonMetalExchangeDerivativeContractsMember
1608	Disclosure of financial liabilities [line items]	LineItems			ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1609	Book value	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
1610	Fair value	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilitiesAtFairValue
1611	2482405 - Disclosure - Financial instruments - Fair Value (Details)	Network	*	*	http://www.luxfer.com/role/FinancialInstrumentsFairValueDetails
1612	Disclosure of fair value measurement of liabilities [table]	Table	*	*	ifrs-full:DisclosureOfFairValueMeasurementOfLiabilitiesTable
1613	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
1614	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
1615	At fair value	Member			ifrs-full:AtFairValueMember
1616	Classes of liabilities [axis]	Axis			ifrs-full:ClassesOfLiabilitiesAxis
1617	Liabilities [member]	Member			ifrs-full:LiabilitiesMember
1618	Forward foreign currency exchange rate contracts	Member			ifrs-full:ForwardContractMember
1619	LME derivative contracts	Member			lxfr:LondonMetalExchangeDerivativeContractsMember
1620	Loan Notes due 2018	Member			lxfr:LoanNotesDue2018Member
1621	Loan Notes due 2021	Member			lxfr:LoanNotesDue2021Member
1622	Loan Notes due 2023	Member			lxfr:LoanNotesDue2023Member
1623	Loan Notes due 2026	Member			lxfr:LoanNotesDue2026Member
1624	Revolving credit facility	Member			lxfr:RevolvingCreditFacility1Member
1625	Overdrafts	Member			lxfr:BankOverdrafts1Member
1626	Deferred contingent consideration	Member			lxfr:DeferredContingentConsiderationMember
1627	Deferred consideration	Member			lxfr:DeferredConsiderationMember
1628	Levels of fair value hierarchy [axis]	Axis			ifrs-full:LevelsOfFairValueHierarchyAxis
1629	All levels of fair value hierarchy [member]	Member			ifrs-full:AllLevelsOfFairValueHierarchyMember
1630	Level 1	Member			ifrs-full:Level1OfFairValueHierarchyMember
1631	Level 2	Member			ifrs-full:Level2OfFairValueHierarchyMember
1632	Level 3	Member			ifrs-full:Level3OfFairValueHierarchyMember
1633	Disclosure of fair value measurement of liabilities [line items]	LineItems			ifrs-full:DisclosureOfFairValueMeasurementOfLiabilitiesLineItems
1634	Liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
1635	2482406 - Disclosure - Financial instruments - Changes in Level 3 Instruments (Details)	Network	*	*	http://www.luxfer.com/role/FinancialInstrumentsChangesInLevel3InstrumentsDetails
1636	Disclosure of fair value measurement of liabilities [table]	Table	*	*	ifrs-full:DisclosureOfFairValueMeasurementOfLiabilitiesTable
1637	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
1638	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
1639	At fair value	Member			ifrs-full:AtFairValueMember
1640	Levels of fair value hierarchy [axis]	Axis			ifrs-full:LevelsOfFairValueHierarchyAxis
1641	All levels of fair value hierarchy [member]	Member			ifrs-full:AllLevelsOfFairValueHierarchyMember
1642	Level 3	Member			ifrs-full:Level3OfFairValueHierarchyMember
1643	Disclosure of fair value measurement of liabilities [line items]	LineItems			ifrs-full:DisclosureOfFairValueMeasurementOfLiabilitiesLineItems
1644	Reconciliation of changes in fair value measurement, liabilities [abstract]	Abstract			ifrs-full:ReconciliationOfChangesInFairValueMeasurementLiabilitiesAbstract
1645	Balance at January 1	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
1646	Payments made during year	Concept (Monetary)	For Period	Debit	ifrs-full:SettlementsFairValueMeasurementLiabilities
1647	New deferred consideration	Concept (Monetary)	For Period	Credit	lxfr:IncreaseDecreaseOfDeferredConsideration
1648	Gains recognized in profit or loss	Concept (Monetary)	For Period		ifrs-full:GainsLossesRecognisedInProfitOrLossFairValueMeasurementLiabilities
1649	Balance at December 31	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
1650	Total gains for the period included in profit and loss for assets held at the end at December 31	Concept (Monetary)	For Period	Credit	lxfr:GainsLossesRecognisedInProfitOrLossAttributableToChangeInOtherGainsOrLossesForAssetsHeldAtEndOfPeriodFairValueMeasurement
1651	Change in unrealized (gains) or losses for the period included in profit and loss for assets held at the end at December 31	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesRecognisedInProfitOrLossAttributableToChangeInUnrealisedGainsOrLossesForAssetsHeldAtEndOfPeriodFairValueMeasurement
1652	2482407 - Disclosure - Financial instruments - Interest Rate Risk Profiles (Details)	Network	*	*	http://www.luxfer.com/role/FinancialInstrumentsInterestRateRiskProfilesDetails
1653	Disclosure of financial instruments by type of interest rate [table]	Table	*	*	ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateTable
1654	Types of interest rates [axis]	Axis			ifrs-full:TypesOfInterestRatesAxis
1655	Interest rate types [member]	Member			ifrs-full:InterestRateTypesMember
1656	Floating interest rate	Member			ifrs-full:FloatingInterestRateMember
1657	Fixed interest rate	Member			ifrs-full:FixedInterestRateMember
1658	Currency 1 [Axis]	Axis			lxfr:Currency1Axis
1659	Currency 1 [Domain]	Member			lxfr:Currency1Domain
1660	U.S. dollar	Member			currency:USD
1661	GBP sterling	Member			currency:GBP
1662	Euro	Member			currency:EUR
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1664	Chinese renminbi	Member			currency:CNY
1665	Czech koruna	Member			currency:CZK
1666	Canadian dollar	Member			currency:CAD
1667	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
1668	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
1669	Cash and cash equivalents	Member			lxfr:CashAndCashEquivalents1Member
1670	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
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1672	Revolving credit facility	Member			lxfr:RevolvingCreditFacility1Member
1673	Loan Notes due 2018	Member			lxfr:LoanNotesDue2018Member
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1676	Loan Notes due 2026	Member			lxfr:LoanNotesDue2026Member
1677	Overdrafts	Member			lxfr:BankOverdrafts1Member
1678	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1679	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1680	Within 12 months	Member			ifrs-full:NotLaterThanOneYearMember
1681	1-5 years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1682	In over five years	Member			ifrs-full:LaterThanFiveYearsMember
1683	Disclosure of financial instruments by type of interest rate [line items]	LineItems			ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateLineItems
1684	Financial assets book value	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
1685	Financial liabilities book value	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
1686	Financial liabilities, including interest payments	Concept (Monetary)	As Of	Credit	lxfr:FinancialLiabilitiesIncludingInterestPayments
1687	2482408 - Disclosure - Financial instruments - Hedging Activities (Details)	Network	*	*	http://www.luxfer.com/role/FinancialInstrumentsHedgingActivitiesDetails
1688	Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [table]	Table	*	*	ifrs-full:DisclosureOfInformationAboutTermsAndConditionsOfHedgingInstrumentsAndHowTheyAffectFutureCashFlowsTable
1689	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
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1692	Hedging instruments [axis]	Axis			ifrs-full:HedgingInstrumentsAxis
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1694	Sales hedges	Member			lxfr:SalesHedgesMember
1695	Purchase hedges	Member			lxfr:PurchaseHedgesMember
1696	Range [axis]	Axis			ifrs-full:RangeAxis
1697	Ranges [member]	Member			ifrs-full:RangesMember
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1699	Maximum	Member			ifrs-full:TopOfRangeMember
1700	Currency 1 [Axis]	Axis			lxfr:Currency1Axis
1701	Currency 1 [Domain]	Member			lxfr:Currency1Domain
1702	U.S. dollar	Member			currency:USD
1703	Euros	Member			currency:EUR
1704	Australian dollar	Member			currency:AUD
1705	Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]	LineItems			ifrs-full:DisclosureOfInformationAboutTermsAndConditionsOfHedgingInstrumentsAndHowTheyAffectFutureCashFlowsLineItems
1706	Contract totals	Concept (Decimal)	As Of		ifrs-full:NominalAmountOfHedgingInstrument
1707	Exchange rates	Concept (Decimal)	As Of		ifrs-full:AveragePriceOfHedgingInstrument
1708	2485402 - Disclosure - Retirement benefits - Narrative (Details)	Network	*	*	http://www.luxfer.com/role/RetirementBenefitsNarrativeDetails
1709	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
1710	Pension Liabilities Settlement [Axis]	Axis			lxfr:PensionLiabilitiesSettlementAxis
1711	Pension Liabilities Settlement [Domain]	Member			lxfr:PensionLiabilitiesSettlementDomain
1712	$10 million liabilities settlement of U.S, Plan	Member			lxfr:SettlementTwoMember
1713	Settlement lump sums paid	Member			lxfr:SettlementOneMember
1714	Income Statement Location [Axis]	Axis			lxfr:IncomeStatementLocation1Axis
1715	Income Statement Location [Domain]	Member			lxfr:IncomeStatementLocation1Domain
1716	Cost of sales	Member			lxfr:CostOfSales1Member
1717	Administrative costs	Member			lxfr:AdministrativeCostsMember
1718	Changes to defined benefit pension plans	Member			lxfr:ChangesToDefinedBenefitPensionPlansMember
1719	Finance costs	Member			lxfr:FinanceCostsMember
1720	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
1721	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
1722	U.K.	Member			ifrs-full:DomesticDefinedBenefitPlansMember
1723	Non-U.K.	Member			ifrs-full:ForeignDefinedBenefitPlansMember
1724	Range [axis]	Axis			ifrs-full:RangeAxis
1725	Ranges [member]	Member			ifrs-full:RangesMember
1726	Minimum	Member			ifrs-full:BottomOfRangeMember
1727	Maximum	Member			ifrs-full:TopOfRangeMember
1728	Retirement Plan Funding Status1 [Axis]	Axis			lxfr:RetirementPlanFundingStatus1Axis
1729	Retirement Plan Funding Status1 [Domain]	Member			lxfr:RetirementPlanFundingStatus1Domain
1730	Unfunded Plan	Member			lxfr:UnfundedPlan1Member
1731	Funded Plan	Member			lxfr:FundedPlan1Member
1732	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
1733	Salary earnings cap on defined benefit plans	Concept (Monetary)	For Period	Debit	lxfr:SalaryEarningsCapOnDefinedBenefitPlans
1734	Number of active members in employee benefit plan	Concept (Integer)	For Period		lxfr:NumberOfActiveMembersInEmployeeBenefitPlan
1735	Weighted average duration of defined benefit obligation	Concept (Decimal)	For Period		ifrs-full:WeightedAverageDurationOfDefinedBenefitObligation
1736	Minimum annual contribution	Concept (Monetary)	For Period	Credit	lxfr:MinimumAnnualContribution
1737	Expected percent of earnings rate one	Concept (Percent)	For Period		lxfr:ActuarialAssumptionsExpectedEarningsRateOne
1738	Expected earnings amount one	Concept (Monetary)	For Period	Debit	lxfr:ActuarialAssumptionOfExpectedEarningsAmountOne
1739	Expected percent of earnings rate two	Concept (Percent)	For Period		lxfr:ActuarialAssumptionsExpectedEarningsRateTwo
1740	Expected earnings amount two	Concept (Monetary)	For Period	Debit	lxfr:ActuarialAssumptionOfExpectedEarningsAmountTwo
1741	Total charge (credit) for retirement plans	Concept (Monetary)	For Period	Debit	lxfr:PostemploymentBenefitExpense
1742	Remeasurement of defined benefit retirement plans	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
1743	Annuity settlement payments	Concept (Monetary)	For Period	Debit	lxfr:AnnuityPaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset
1744	Credit (charge) from annuity settlement payments	Concept (Monetary)	For Period	Debit	lxfr:GainsLossesArisingFromAnnuitySettlementsNetDefinedBenefitLiabilityAsset
1745	Lump sum settlement payments	Concept (Monetary)	For Period	Debit	lxfr:CashPaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset
1746	Credit (charge) from cash settlement payment	Concept (Monetary)	For Period	Debit	lxfr:GainsLossesArisingFromCashSettlementsNetDefinedBenefitLiabilityAsset
1747	Curtailment credit arising from changes to defined benefit pension plans	Concept (Monetary)	For Period	Credit	lxfr:CurtailmentCostNetDefinedBenefitLiabilityAsset
1748	Gross amounts settled	Concept (Monetary)	For Period	Debit	ifrs-full:PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset
1749	Past service credit	Concept (Monetary)	For Period	Credit	ifrs-full:PastServiceCostNetDefinedBenefitLiabilityAsset
1750	Changes to defined benefit pension plans	Concept (Monetary)	For Period	Credit	lxfr:ProfitLossFromOperatingActivitiesChangesToDefinedBenefitPensionPlan
1751	Remeasurement of defined benefit retirement plans	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
1752	Return on plan assets, gain (loss)	Concept (Monetary)	For Period	Debit	ifrs-full:ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset
1753	Defined benefit obligation	Concept (Monetary)	As Of	Credit	ifrs-full:DefinedBenefitObligationAtPresentValue
1754	Estimate of contributions expected to be paid to plan for next annual reporting period	Concept (Monetary)	For Period	Credit	ifrs-full:EstimateOfContributionsExpectedToBePaidToPlan
1755	Actual employer contributions	Concept (Monetary)	For Period	Debit	ifrs-full:ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset
1756	2485403 - Disclosure - Retirement benefits - Movement in Pension Liabilities (Details)	Network	*	*	http://www.luxfer.com/role/RetirementBenefitsMovementInPensionLiabilitiesDetails
1757	Implied Table	Table	*	*	implied:Table
1758	Employee Benefits [Abstract]	Abstract			lxfr:EmployeeBenefitsAbstract
1759	Net defined benefit liability (asset), beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1760	(Credited) / charged to the consolidated income statement:	Abstract			ifrs-full:ChangesInNetDefinedBenefitLiabilityAssetAbstract
1761	Past service credit	Concept (Monetary)	For Period	Credit	ifrs-full:PastServiceCostNetDefinedBenefitLiabilityAsset
1762	Curtailment credit	Concept (Monetary)	For Period	Credit	lxfr:CurtailmentCostNetDefinedBenefitLiabilityAsset
1763	Current service cost	Concept (Monetary)	For Period	Credit	ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
1764	Net interest on net liability	Concept (Monetary)	For Period	Credit	ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1765	Administrative costs	Concept (Monetary)	For Period	Credit	lxfr:AdministrativeCostsNetDefinedBenefitLiabilityAsset
1766	Total charge for defined contribution plans	Concept (Monetary)	For Period	Debit	ifrs-full:PostemploymentBenefitExpenseDefinedContributionPlans
1767	Cash contributions	Concept (Monetary)	For Period	Debit	ifrs-full:ContributionsToPlanNetDefinedBenefitLiabilityAsset
1768	(Credited) / charged to the consolidated statement of comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
1769	Exchange difference	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
1770	Net defined benefit liability (asset), ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1771	2485404 - Disclosure - Retirement benefits - Financial Assumptions (Details)	Network	*	*	http://www.luxfer.com/role/RetirementBenefitsFinancialAssumptionsDetails
1772	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
1773	Actuarial Assumptions, Measurement Gender [Axis]	Axis			lxfr:ActuarialAssumptionsMeasurementGenderAxis
1774	Actuarial Assumptions, Measurement Gender [Domain]	Member			lxfr:ActuarialAssumptionsMeasurementGenderDomain
1775	Male	Member			lxfr:MaleMember
1776	Female	Member			lxfr:FemaleMember
1777	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
1778	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
1779	U.K.	Member			ifrs-full:DomesticDefinedBenefitPlansMember
1780	Non-U.K.	Member			ifrs-full:ForeignDefinedBenefitPlansMember
1781	Actuarial Assumptions, Measurement Tranches [Axis]	Axis			lxfr:ActuarialAssumptionsMeasurementTranchesAxis
1782	Actuarial Assumptions, Measurement Tranches [Domain]	Member			lxfr:ActuarialAssumptionsMeasurementTranchesDomain
1783	Pre 6 April 1997	Member			lxfr:BeforeApril61997Member
1784	1997 - 2005	Member			lxfr:April61997ToApril52005Member
1785	Post 5 April 2005	Member			lxfr:AfterApril52005Member
1786	Age 65 at accounting date	Member			lxfr:Age65AtAccountingDateMember
1787	Aged 65 at 20 years after accounting date	Member			lxfr:Age65At20YearsAfterAccountingDateMember
1788	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
1789	Discount rate	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfDiscountRates
1790	Retail Price Inflation	Concept (Percent)	As Of		lxfr:ActuarialAssumptionOfExpectedRatesOfRetailPriceInflation
1791	Salary inflation	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
1792	Consumer Price Inflation	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfExpectedRatesOfInflation
1793	Pension increases	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfExpectedRatesOfPensionIncreases
1794	Life expectancy	Concept (Decimal)	As Of		ifrs-full:ActuarialAssumptionOfLifeExpectancyAfterRetirement
1795	2485405 - Disclosure - Retirement benefits - Benefit Expenses (Details)	Network	*	*	http://www.luxfer.com/role/RetirementBenefitsBenefitExpensesDetails
1796	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
1797	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
1798	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
1799	U.K.	Member			ifrs-full:DomesticDefinedBenefitPlansMember
1800	Non-U.K.	Member			ifrs-full:ForeignDefinedBenefitPlansMember
1801	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
1802	Current service cost	Concept (Monetary)	For Period	Credit	ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
1803	Net interest on net liability	Concept (Monetary)	For Period	Credit	ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1804	Administrative expenses	Concept (Monetary)	For Period	Credit	lxfr:AdministrativeCostsNetDefinedBenefitLiabilityAsset
1805	Past service credit	Concept (Monetary)	For Period	Credit	ifrs-full:PastServiceCostNetDefinedBenefitLiabilityAsset
1806	Curtailment credit	Concept (Monetary)	For Period	Credit	lxfr:CurtailmentCostNetDefinedBenefitLiabilityAsset
1807	Total charge / (credit) for defined benefit plans	Concept (Monetary)	For Period	Debit	ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans
1808	Total charge for defined contribution plans	Concept (Monetary)	For Period	Debit	ifrs-full:PostemploymentBenefitExpenseDefinedContributionPlans
1809	Total charge / (credit) for pension plans	Concept (Monetary)	For Period	Debit	lxfr:PostemploymentBenefitExpense
1810	2485406 - Disclosure - Retirement benefits - Plan Assets (Details)	Network	*	*	http://www.luxfer.com/role/RetirementBenefitsPlanAssetsDetails
1811	Disclosure of fair value of plan assets [table]	Table	*	*	ifrs-full:DisclosureOfFairValueOfPlanAssetsTable
1812	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
1813	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
1814	U.K.	Member			ifrs-full:DomesticDefinedBenefitPlansMember
1815	Non-U.K.	Member			ifrs-full:ForeignDefinedBenefitPlansMember
1816	Disclosure of fair value of plan assets [line items]	LineItems			ifrs-full:DisclosureOfFairValueOfPlanAssetsLineItems
1817	Equities and growth funds	Concept (Monetary)	As Of	Debit	ifrs-full:EquityInstrumentsAmountContributedToFairValueOfPlanAssets
1818	Government bonds	Concept (Monetary)	As Of	Debit	lxfr:GovernmentBondsAmountContributedToFairValueOfPlanAssets
1819	Corporate bonds	Concept (Monetary)	As Of	Debit	lxfr:CorporateBondsAmountContributedToFairValueOfPlanAssets
1820	Cash	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsAmountContributedToFairValueOfPlanAssets
1821	Total market value of assets	Concept (Monetary)	As Of	Debit	ifrs-full:PlanAssetsAtFairValue
1822	Present value of plan liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DefinedBenefitObligationAtPresentValue
1823	Deficit in the plans	Concept (Monetary)	As Of	Debit	ifrs-full:SurplusDeficitInPlan
1824	Related deferred income tax assets	Concept (Monetary)	As Of	Debit	lxfr:DeferredTaxAssetRetirementBenefitObligation
1825	Net pension liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:RecognisedLiabilitiesDefinedBenefitPlan
1826	2485407 - Disclosure - Retirement benefits - Movement in Defined Benefit Obligations (Details)	Network	*	*	http://www.luxfer.com/role/RetirementBenefitsMovementInDefinedBenefitObligationsDetails
1827	Disclosure of net defined benefit liability (asset) [table]	Table	*	*	ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1828	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
1829	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
1830	U.K.	Member			ifrs-full:DomesticDefinedBenefitPlansMember
1831	Non-U.K.	Member			ifrs-full:ForeignDefinedBenefitPlansMember
1832	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1833	Net defined benefit liability (asset) [member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
1834	Present value of defined benefit obligation	Member			ifrs-full:PresentValueOfDefinedBenefitObligationMember
1835	Disclosure of net defined benefit liability (asset) [line items]	LineItems			ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1836	Net defined benefit liability (asset), beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1837	Service cost	Concept (Monetary)	For Period	Credit	ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
1838	Interest on obligation	Concept (Monetary)	For Period	Credit	ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1839	Contributions from plan members	Concept (Monetary)	For Period	Debit	ifrs-full:ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset
1840	Actuarial gains on financial assumptions	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
1841	Actuarial gains on plan experience	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset
1842	Exchange difference	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
1843	Benefits paid	Concept (Monetary)	For Period	Debit	ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
1844	Past service credit	Concept (Monetary)	For Period	Credit	ifrs-full:PastServiceCostNetDefinedBenefitLiabilityAsset
1845	Curtailment credit	Concept (Monetary)	For Period	Credit	lxfr:CurtailmentCostNetDefinedBenefitLiabilityAsset
1846	Net defined benefit liability (asset), ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1847	2485408 - Disclosure - Retirement benefits - Sensitivity Analysis for Actuarial Assumptions (Details)	Network	*	*	http://www.luxfer.com/role/RetirementBenefitsSensitivityAnalysisForActuarialAssumptionsDetails
1848	Disclosure of sensitivity analysis for actuarial assumptions [table]	Table	*	*	ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable
1849	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
1850	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
1851	Actuarial assumptions [axis]	Axis			ifrs-full:ActuarialAssumptionsAxis
1852	Actuarial assumptions [member]	Member			ifrs-full:ActuarialAssumptionsMember
1853	Discount rate	Member			ifrs-full:ActuarialAssumptionOfDiscountRatesMember
1854	CPI inflation (and related increases)	Member			ifrs-full:ActuarialAssumptionOfExpectedRatesOfInflationMember
1855	Post retirement mortality	Member			ifrs-full:ActuarialAssumptionOfMortalityRatesMember
1856	Disclosure of sensitivity analysis for actuarial assumptions [line items]	LineItems			ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems
1857	Percentage of reasonably possible increase in actuarial assumption	Concept (Percent)	As Of		ifrs-full:PercentageOfReasonablyPossibleIncreaseInActuarialAssumption
1858	Percentage of impact on total defined benefit obligations due to increase in actuarial assumption	Concept (Percent)	As Of		lxfr:PercentageOfIncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption
1859	Percentage of reasonably possible decrease in actuarial assumption	Concept (Percent)	As Of		ifrs-full:PercentageOfReasonablyPossibleDecreaseInActuarialAssumption
1860	Percentage of impact on total defined benefit obligations due to decrease in actuarial assumption	Concept (Percent)	As Of		lxfr:PercentageOfIncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption
1861	Duration of reasonably possible increase in actuarial assumption	Concept (xbrli:durationItemType)	For Period		lxfr:DurationOfReasonablyPossibleIncreaseInActuarialAssumption
1862	Duration of reasonably possible decrease in actuarial assumption	Concept (xbrli:durationItemType)	For Period		lxfr:DurationOfReasonablyPossibleDecreaseInActuarialAssumption
1863	2485409 - Disclosure - Retirement benefits - Movement in Fair Value of Plan Assets (Details)	Network	*	*	http://www.luxfer.com/role/RetirementBenefitsMovementInFairValueOfPlanAssetsDetails
1864	Disclosure of net defined benefit liability (asset) [table]	Table	*	*	ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1865	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
1866	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
1867	U.K.	Member			ifrs-full:DomesticDefinedBenefitPlansMember
1868	Non-U.K.	Member			ifrs-full:ForeignDefinedBenefitPlansMember
1869	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1870	Net defined benefit liability (asset) [member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
1871	Fair value of plan assets	Member			ifrs-full:PlanAssetsMember
1872	Disclosure of net defined benefit liability (asset) [line items]	LineItems			ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1873	Net defined benefit liability (asset), beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1874	Interest on plan assets	Concept (Monetary)	For Period	Credit	ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1875	Actuarial gains	Concept (Monetary)	For Period	Debit	ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset
1876	Exchange difference	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
1877	Contributions from employer	Concept (Monetary)	For Period	Debit	ifrs-full:ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset
1878	Contributions from plan members	Concept (Monetary)	For Period	Debit	ifrs-full:ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset
1879	Administrative expenses	Concept (Monetary)	For Period	Credit	lxfr:AdministrativeCostsNetDefinedBenefitLiabilityAsset
1880	Benefits paid	Concept (Monetary)	For Period	Debit	ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
1881	Settlement credit	Concept (Monetary)	For Period	Debit	ifrs-full:PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset
1882	Net defined benefit liability (asset), ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1883	2488402 - Disclosure - The Luxfer Group Employee Share Ownership Plan (Details)	Network	*	*	http://www.luxfer.com/role/LuxferGroupEmployeeShareOwnershipPlanDetails
1884	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1885	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1886	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1887	Number of shares held by ESOP Trustees	Member			lxfr:OwnSharesHeldByEmployeeStockOwnershipPlanMember
1888	ESOP	Member			lxfr:EmployeeShareOwnershipPlanMember
1889	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
1890	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
1891	Deferred shares	Member			lxfr:DeferredSharesMember
1892	Ordinary shares	Member			ifrs-full:OrdinarySharesMember
1893	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1894	Number of share options outstanding, beginning balance (in shares)	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1895	Shares utilized during the year	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
1896	Shares transferred into ESOP during the year	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
1897	Number of share options outstanding, ending balance (in shares)	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1898	Bank and other loans	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
1899	Par value per share (in GBP per share)	Concept (Share)	As Of		ifrs-full:ParValuePerShare
1900	Market value of options	Concept (Monetary)	As Of	Credit	ifrs-full:WeightedAverageFairValueAtMeasurementDateShareOptionsGranted
1901	2491402 - Disclosure - Share based compensation - Additional Information (Details)	Network	*	*	http://www.luxfer.com/role/ShareBasedCompensationAdditionalInformationDetails
1902	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1903	Vesting [Axis]	Axis			lxfr:Vesting1Axis
1904	Vesting [Domain]	Member			lxfr:Vesting1Domain
1905	Vested immediately	Member			lxfr:VestedImmediatelyMember
1906	Vest upon first, second and third anniversary of IPO	Member			lxfr:VestUponFirstSecondAndThirdAnniversaryofInitialPublicOfferingMember
1907	Plan Name [Axis]	Axis			lxfr:PlanName1Axis
1908	Plan Name [Domain]	Member			lxfr:PlanName1Domain
1909	LTiP	Member			lxfr:LongTermUmbrellaIncentivePlanLTiP1Member
1910	Director EIP	Member			lxfr:NonExecutiveDirectorsEquityIncentivePlanMember
1911	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1912	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1913	RSU	Member			lxfr:RestrictedStockUnitsMember
1914	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1915	Number of share options outstanding in share-based payment arrangement	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1916	Number of share options exercisable in share-based payment arrangement	Concept (Decimal)	As Of		ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
1917	Award vesting percentage	Concept (Percent)	For Period		lxfr:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage1
1918	Number of other equity instruments granted (in shares)	Concept (Decimal)	For Period		ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
1919	Number of share options granted (in shares)	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
1920	Weighted average remaining contractual life of outstanding share options	Concept (Decimal)	As Of		ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions
1921	Weighted average fair value of options granted (in USD per share)	Concept (Monetary)	As Of	Credit	ifrs-full:WeightedAverageFairValueAtMeasurementDateShareOptionsGranted
1922	2491403 - Disclosure - Share based compensation - Components of Share Based Compensation Charges (Details)	Network	*	*	http://www.luxfer.com/role/ShareBasedCompensationComponentsOfShareBasedCompensationChargesDetails
1923	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1924	Types Of Share Based Compensation Charges [Axis]	Axis			lxfr:TypesOfShareBasedCompensationChargesAxis
1925	Types Of Share Based Compensation Charges [Domain]	Member			lxfr:TypesOfShareBasedCompensationChargesDomain
1926	I.P.O. related share based compensation charges	Member			lxfr:InitialPublicOfferingRelatedMember
1927	Other share based compensation charges	Member			lxfr:OtherShareBasedCompensationChargesMember
1928	Restructuring share based compensation charges	Member			lxfr:RestructuringShareBasedCompensationChargesMember
1929	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1930	Share based compensation charges (Note 31)	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
1931	2491404 - Disclosure - Share based compensation - Share Options Activities (Details)	Network	*	*	http://www.luxfer.com/role/ShareBasedCompensationShareOptionsActivitiesDetails
1932	Implied Table	Table	*	*	implied:Table
1933	Disclosure Of Share-Based Payment Arrangements [Abstract]	Abstract			lxfr:DisclosureOfShareBasedPaymentArrangementsAbstract
1934	Number of share options outstanding, beginning balance (in shares)	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1935	Number of share options granted (in shares)	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
1936	Number of share options exercised (in shares)	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
1937	Number of accrued dividend awards (in shares)	Concept (Shares)	For Period		lxfr:NumberOfAccruedDividendShareOptionsAwardsInShareBasedPaymentArrangement
1938	Number of share options lapsed (in shares)	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement
1939	Number of share options outstanding, ending balance (in shares)	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1940	Weighted average exercise price of share options outstanding, beginning balance (in USD per share)	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1941	Weighted average exercise price of share options granted (in USD per share)	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement
1942	Weighted average exercise price of share options exercised (in USD per share)	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
1943	Weighted average exercise price of accrued dividend awards (in USD per share)	Concept (Monetary)	For Period	Debit	lxfr:WeightedAverageExercisePriceOfAccruedDividendShareOptionsAwardsInShareBasedPaymentArrangement
1944	Weighted average exercise price of share options lapsed (in USD per share)	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement
1945	Weighted average exercise price of share options outstanding, ending balance (in USD per share)	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1946	2491405 - Disclosure - Share based compensation - Fair Value Assumptions (Details)	Network	*	*	http://www.luxfer.com/role/ShareBasedCompensationFairValueAssumptionsDetails
1947	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1948	Range [axis]	Axis			ifrs-full:RangeAxis
1949	Ranges [member]	Member			ifrs-full:RangesMember
1950	Minimum	Member			ifrs-full:BottomOfRangeMember
1951	Maximum	Member			ifrs-full:TopOfRangeMember
1952	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1953	Dividend yield (%)	Concept (Percent)	For Period		ifrs-full:ExpectedDividendAsPercentageShareOptionsGranted
1954	Expected volatility range (%)	Concept (Percent)	For Period		ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted
1955	Risk-free interest rate (%)	Concept (Percent)	For Period		ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted
1956	Expected life of share options range (years)	Concept (Decimal)	For Period		ifrs-full:DescriptionOfOptionLifeShareOptionsGranted
1957	Weighted average exercise price (in USD per share)	Concept (Monetary)	For Period		ifrs-full:WeightedAverageSharePriceShareOptionsGranted
1958	2494401 - Disclosure - Related party transactions (Details)	Network	*	*	http://www.luxfer.com/role/RelatedPartyTransactionsDetails
1959	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1960	Related Parties Name [Axis]	Axis			lxfr:RelatedPartiesNameAxis
1961	Related Parties Name [Domain]	Member			lxfr:RelatedPartiesNameDomain
1962	Luxfer Uttam India Private Limited	Member			lxfr:LuxferUttamIndiaPrivateLimitedMember
1963	Nikkei-MEL Co. Limited	Member			lxfr:NikkeiMELCo.LimitedMember
1964	Luxfer Holdings NA, LLC	Member			lxfr:LuxferHoldingsNALLCMember
1965	Sub161 Pty Limited	Member			lxfr:Sub161PtyLimitedMember
1966	Directors and key management	Member			lxfr:DirectorsAndKeyManagementMember
1967	Stone Canyon Industries LLC	Member			lxfr:StoneCanyonIndustriesLLCMember
1968	FTI Consulting [Member]	Member			lxfr:FTIConsultingMember
1969	Cherokee Properties Inc.	Member			lxfr:CherokeePropertiesInc.Member
1970	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1971	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1972	Joint ventures where entity is venturer	Member			ifrs-full:JointVenturesWhereEntityIsVenturerMember
1973	Associates	Member			ifrs-full:AssociatesMember
1974	Types of Amounts Receivable, Related Party Transactions [Axis]	Axis			lxfr:TypesofAmountsReceivableRelatedPartyTransactionsAxis
1975	Types of Amounts Receivable, Related Party Transactions [Domain]	Member			lxfr:TypesofAmountsReceivableRelatedPartyTransactionsDomain
1976	Amount from trade debt	Member			lxfr:AmountFromTradeDebtMember
1977	Amount from debt investment	Member			lxfr:AmountFromDebtInvestmentMember
1978	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
1979	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
1980	Ordinary shares	Member			ifrs-full:OrdinarySharesMember
1981	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1982	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1983	Secured loan note	Member			lxfr:SecuredLoanNoteMember
1984	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
1985	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
1986	Sub161 Pty Limited	Member			lxfr:Sub161PtyLimitedMember
1987	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1988	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1989	Gross carrying amount	Member			ifrs-full:GrossCarryingAmountMember
1990	Unamortized finance costs	Member			lxfr:UnamortizedFinanceCostsMember
1991	Disclosure of transactions between related parties [line items]	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1992	Investment ownership percentage	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInJointVenture
1993	Sales to related party	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions
1994	Amounts receivable, related party transactions	Concept (Monetary)	As Of	Debit	ifrs-full:AmountsReceivableRelatedPartyTransactions
1995	Net accounts receivable, related party transactions	Concept (Monetary)	As Of	Debit	lxfr:NetAccountsReceivableRelatedPartyTransactions
1996	Debt investment provided (repayment from investment received), related party transactions	Concept (Monetary)	For Period	Credit	lxfr:DebtInvestmentProvidedRepaymentFromInvestmentReceivedRelatedPartyTransactions
1997	Debt investment provided to related party	Concept (Monetary)	As Of	Debit	lxfr:DebtInvestmentProvidedToRelatedParty
1998	Percentage of voting equity interests acquired	Concept (Percent)	As Of		ifrs-full:PercentageOfVotingEquityInterestsAcquired
1999	Borrowings, interest rate	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
2000	Borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
2001	Par value per share (in GBP per share)	Concept (Share)	As Of		ifrs-full:ParValuePerShare
2002	Number of shares outstanding	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
2003	Number of American Depositary Shares outstanding	Concept (Integer)	As Of		lxfr:NumberOfAmericanDepositarySharesOutstanding
2004	Number of shares award held over	Concept (Shares)	As Of		lxfr:NumberOfSharesAwardHeldOver
2005	Services received, related party transactions	Concept (Monetary)	For Period	Debit	ifrs-full:ServicesReceivedRelatedPartyTransactions
2006	Leases as lessee, related party transactions	Concept (Monetary)	For Period		ifrs-full:LeasesAsLesseeRelatedPartyTransactions