Luxfer (LXFR) 10-Q 31 Jul 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	6 Months Ended
	Jun. 30, 2019shares
Document And Entity Information [Abstract]
Entity Registrant Name	Luxfer Holdings PLC
Entity Central Index Key	0001096056
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding	26,125,773
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Current Reporting Status	Yes
Entity Shell Company	false

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Income Statement [Abstract]
Net sales		$ 116.5	$ 128.2	$ 236.9	$ 247.9
Cost of goods sold		(85.5)	(94.6)	(175.8)	(184)
Gross profit		31	33.6	61.1	63.9
Selling, general and administrative expenses		(14.4)	(16.8)	(30.8)	(32)
Research and development		(1.6)	(1.9)	(3)	(3.5)
Restructuring charges		(12.7)	(0.3)	(21.7)	(1)
Impairment charges		0	0	0.2	0
Acquisition and disposal related gains / (costs)		2.9	0	(1.7)	0
Operating income		5.2	14.6	4.1	27.4
Interest expense		(1.1)	(1.1)	(2.2)	(2.7)
Interest income		0	0.1	0	0.2
Defined benefit pension credit		0.5	1.2	1.1	2.6
Income before income taxes and equity in net income of affiliates		4.6	14.8	3	27.5
Provision for income taxes		(1.4)	(3.4)	(3.5)	(6.4)
Income / (loss) before equity in net income of affiliates		3.2	11.4	(0.5)	21.1
Equity income of affiliates (net of tax)		0.3	0	0.2	0.2
Net income / (loss)		$ 3.5	$ 11.4	$ (0.3)	$ 21.3
Earnings / (loss) per share
Basic (usd per share)		$ 0.13	$ 0.43	$ (0.01)	$ 0.80
Diluted (usd per share)	[1]	$ 0.13	$ 0.41	$ (0.01)	$ 0.78
Weighted average ordinary shares outstanding
Basic (shares)		27,302,174	26,558,883	27,168,170	26,535,824
Diluted (shares)		27,889,909	27,584,515	27,168,170	27,396,557
[1]	The loss per share for 2019 year-to-date has not been diluted, since the incremental shares included in the weighted-average number of shares outstanding would have been anti-dilutive.

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME / (LOSS) (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Statement of Comprehensive Income [Abstract]
Net income / (loss)	$ 3.5	$ 11.4	$ (0.3)	$ 21.3
Other comprehensive (loss) / income
Net change in foreign currency translation adjustment	(3.6)	(6.2)	(2.2)	(2.8)
Pension and post-retirement actuarial gains, net of $0.1, $3.1, $0.2 and $2.7 tax, respectively	0.3	11.5	0.8	7.6
Cash flow hedges, net of $0.0 tax	(0.2)	0	0	0
Other comprehensive (loss) / income, net of tax	(3.5)	5.3	(1.4)	4.8
Total comprehensive income / (loss)	$ 0	$ 16.7	$ (1.7)	$ 26.1

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME / (LOSS) (UNAUDITED) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Statement of Comprehensive Income [Abstract]
Pension and post-retirement actuarial gains / (losses), tax	$ 0.1	$ 3.1	$ 0.2	$ 2.7
Cash flow hedges, tax	$ 0	$ 0	$ 0	$ 0

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 20.4	$ 13.8
Restricted cash	0.2	0.3
Accounts and other receivables, net of allowances of $1.6 and $2.4, respectively	67.9	62.7
Inventories	98.7	93.6
Other current assets	5.7	10.7
Total current assets	192.9	181.1
Non-current assets
Property, plant and equipment, net	102.3	106.9
Right-of-use assets from operating leases	16.4	18.4
Goodwill	67.4	67.6
Intangibles, net	13.9	14.6
Deferred tax assets	17.3	18.6
Investments and loans to joint ventures and other affiliates	1.9	1.6
Total assets	412.1	408.8
Current liabilities
Current maturities of long-term debt and short-term borrowings	7.2	3.5
Accounts payable	36.3	36.9
Accrued liabilities	23.7	33.8
Taxes on income	0.8	1.6
Other current liabilities	14	15.4
Total current liabilities	82	91.2
Non-current liabilities
Long-term debt	102	73.6
Pensions and other retirement benefits	32.5	40
Deferred tax liabilities	3.2	3.5
Other non-current liabilities	14.4	16.2
Total liabilities	234.1	224.5
Shareholders' equity
Additional paid-in capital	67.3	65.6
Treasury shares	(4.3)	(4.3)
Own shares held by ESOP	(1.7)	(2.2)
Retained earnings	88.2	95.3
Accumulated other comprehensive loss	(148)	(146.6)
Total shareholders' equity	178	184.3
Total liabilities and shareholders' equity	412.1	408.8
Ordinary shares
Shareholders' equity
Common stock	26.6	26.6
Deferred shares
Shareholders' equity
Common stock	$ 149.9	$ 149.9

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) $ in Millions	Jun. 30, 2019USD ($)shares	Jun. 30, 2019£ / shares	Dec. 31, 2018USD ($)shares	Dec. 31, 2018£ / shares
Statement of Financial Position [Abstract]
Accounts and other receivables, allowances | $	$ 1.6		$ 2.4
Ordinary shares
Common stock, par value (in GBP per share) | £ / shares		£ 0.50		£ 0.50
Common stock, shares authorized (in shares)	40,000,000		40,000,000
Common stock, shares issued (in shares)	29,000,000		27,136,799
Common stock, shares outstanding (in shares)	29,000,000		27,136,799
Deferred shares
Common stock, par value (in GBP per share) | £ / shares		£ 0.0001		£ 0.0001
Common stock, shares authorized (in shares)	761,845,318,444		769,423,688,000
Common stock, shares issued (in shares)	761,835,338,444		769,413,708,000
Common stock, shares outstanding (in shares)	761,835,338,444		769,413,708,000

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018
Operating activities
Net income / (loss)	$ (0.3)	$ 21.3
Adjustments to reconcile net (loss) / income to net cash (used for) / provided by operating activities
Equity income of unconsolidated affiliates	(0.2)	(0.2)
Depreciation	7.1	9.2
Amortization of purchased intangible assets	0.6	0.6
Amortization of debt issuance costs	0.2	0.3
Share-based compensation charges	3.4	1.9
Deferred income taxes	1.2	5.1
Gain on disposal of business	(2.9)	0
Asset impairment charges	4.8	0
Pension and other post-retirement expense / (credit)	1.5	(2.1)
Pension and other post-retirement contributions	(6)	(6.9)
Changes in assets and liabilities, net of effects of business acquisitions
Accounts and notes receivable	(4.8)	(3.6)
Inventories	(5.9)	(15.6)
Other current assets	(1.3)	1.2
Accounts payable	(1)	5
Accrued liabilities	(10.8)	4.4
Other current liabilities	0.7	1.2
Other non-current assets and liabilities	(1.9)	(0.4)
Net cash (used for) / provided by operating activities	(15.6)	21.4
Investing activities
Capital expenditures	(7.1)	(3.9)
Proceeds from sale of property, plant and equipment	1.2	0
Proceeds from sale of businesses	4.6	0
Investments in unconsolidated affiliates	0	0.8
Acquisitions, net of cash acquired	0	(0.5)
Net cash used for investing activities	(1.3)	(3.6)
Financing activities
Net drawdown / (repayments) of short-term borrowings	3.8	(19.2)
Net drawdown of long-term borrowings	28.2	5
Deferred consideration paid	(0.5)	0
Proceeds from sale of shares	3.3	0
Share-based compensation cash paid	(4.5)	(4.7)
Dividends paid	(6.8)	(6.7)
Net cash from / (used) for financing activities	23.5	(25.6)
Effect of exchange rate changes on cash and cash equivalents	(0.1)	(0.3)
Net increase / (decrease)	6.5	(8.1)
Cash, cash equivalents and restricted cash; beginning of year	14.1	13.3
Cash, cash equivalents and restricted cash; end of the Second Quarter	20.6	5.2
Supplemental cash flow information:
Interest payments	2.3	2.7
Income tax payments	$ 5	$ 1.7

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (UNAUDITED) - USD ($) shares in Millions, $ in Millions	Total	Additional paid-in capital	Treasury shares	Own shares held by ESOP	Retained earnings	Accumulated other comprehensive loss	Ordinary sharesCommon stock	Deferred sharesCommon stock
Beginning balance at Dec. 31, 2017	$ 174.5	$ 62.1	$ (5.8)	$ (1)	$ 83.7	$ (140.7)	$ 25.3	$ 150.9
Beginning balance (in shares) at Dec. 31, 2017			(0.5)	(0.1)
Net income / (loss)	9.9				9.9
Other comprehensive (loss) income, net of tax	(0.5)					(0.5)
Dividends declared	(6.7)				(6.7)
Share based compensation charges	(0.1)	(0.1)
Purchase of shares from ESOP	0	(0.1)		$ 0.1
Ending balance at Apr. 01, 2018	177.1	61.9	$ (5.8)	$ (0.9)	86.9	(141.2)	25.3	150.9
Ending balance (in shares) at Apr. 01, 2018			(0.5)	(0.1)
Beginning balance at Dec. 31, 2017	174.5	62.1	$ (5.8)	$ (1)	83.7	(140.7)	25.3	150.9
Beginning balance (in shares) at Dec. 31, 2017			(0.5)	(0.1)
Net income / (loss)	21.3
Other comprehensive (loss) income, net of tax	4.8
Ending balance at Jul. 01, 2018	191.1	58.4	$ (5.6)	$ (0.3)	98.3	(135.9)	25.3	150.9
Ending balance (in shares) at Jul. 01, 2018			(0.5)	0
Beginning balance at Apr. 01, 2018	177.1	61.9	$ (5.8)	$ (0.9)	86.9	(141.2)	25.3	150.9
Beginning balance (in shares) at Apr. 01, 2018			(0.5)	(0.1)
Net income / (loss)	11.4				11.4
Other comprehensive (loss) income, net of tax	5.3					5.3
Share based compensation charges	(2.7)	(2.7)
Purchase of shares from ESOP		(0.8)		$ 0.8
Purchase of shares from ESOP (in shares)				0.1
Transfer of shares between treasury and ESOP			$ 0.2	$ (0.2)
Ending balance at Jul. 01, 2018	191.1	58.4	$ (5.6)	$ (0.3)	98.3	(135.9)	25.3	150.9
Ending balance (in shares) at Jul. 01, 2018			(0.5)	0
Beginning balance at Dec. 31, 2018	184.3	65.6	$ (4.3)	$ (2.2)	95.3	(146.6)	26.6	149.9
Beginning balance (in shares) at Dec. 31, 2018			(0.4)	(1.6)
Net income / (loss)	(3.8)				(3.8)
Shares sold from ESOP	1.4	1.3		$ 0.1
Shares sold from ESOP (in shares)				0.1
Other comprehensive (loss) income, net of tax	2.1					2.1
Dividends declared	(3.4)				(3.4)
Share based compensation charges	2.3	2.3
Utilization of shares from ESOP to satisfy share based compensation	(3.1)	(3.3)		$ 0.2
Utilization of shares from ESOP to satisfy share based compensation (in shares)				0.1
Ending balance at Mar. 31, 2019	179.8	65.9	$ (4.3)	$ (1.9)	88.1	(144.5)	26.6	149.9
Ending balance (in shares) at Mar. 31, 2019			(0.4)	(1.4)
Beginning balance at Dec. 31, 2018	184.3	65.6	$ (4.3)	$ (2.2)	95.3	(146.6)	26.6	149.9
Beginning balance (in shares) at Dec. 31, 2018			(0.4)	(1.6)
Net income / (loss)	(0.3)
Other comprehensive (loss) income, net of tax	(1.4)
Ending balance at Jun. 30, 2019	178	67.3	$ (4.3)	$ (1.7)	88.2	(148)	26.6	149.9
Ending balance (in shares) at Jun. 30, 2019			(0.4)	(1.2)
Beginning balance at Mar. 31, 2019	179.8	65.9	$ (4.3)	$ (1.9)	88.1	(144.5)	26.6	149.9
Beginning balance (in shares) at Mar. 31, 2019			(0.4)	(1.4)
Net income / (loss)	3.5				3.5
Shares sold from ESOP	1.9	1.8		$ 0.1
Shares sold from ESOP (in shares)				0.1
Other comprehensive (loss) income, net of tax	(3.5)					(3.5)
Dividends declared	(3.4)				(3.4)
Share based compensation charges	0.8	0.8
Utilization of shares from ESOP to satisfy share based compensation	(1.1)	(1.2)		$ 0.1
Utilization of shares from ESOP to satisfy share based compensation (in shares)				0.1
Ending balance at Jun. 30, 2019	$ 178	$ 67.3	$ (4.3)	$ (1.7)	$ 88.2	$ (148)	$ 26.6	$ 149.9
Ending balance (in shares) at Jun. 30, 2019			(0.4)	(1.2)

CONDENSED CONSOLIDATED STATEM_6

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (UNAUDITED) (Parenthetical) - shares	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jul. 01, 2018	Apr. 01, 2018
Ordinary shares
Common stock, shares outstanding (in shares)	29,000,000	29,000,000	27,136,799	27,136,799	27,136,799
Deferred shares
Common stock, shares outstanding (in shares)	761,835,338,444	761,835,338,444	769,413,708,000	769,413,708,000	769,413,708,000

Basis of Presentation and Respo

Basis of Presentation and Responsibility for interim Financial Statements	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Responsibility for interim Financial Statements	Basis of Presentation and Responsibility for interim Financial Statements We prepared the accompanying unaudited condensed consolidated financial statements of Luxfer Holdings PLC and all wholly-owned, majority owned or otherwise controlled subsidiaries on the same basis as our annual audited financial statements, except for the adoption for Accounting Standards Codification ("ASC") Topic 842, "Leases". We condensed or omitted certain information and footnote disclosures normally included in our annual audited financial statements, which we prepared in accordance with U.S. Generally Accepted Accounting Principles (GAAP). Our quarterly financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2018. As used in this report, the terms "we," "us," "our," "Luxfer" and "the Company" mean Luxfer Holdings PLC and its subsidiaries, unless the context indicates another meaning. In the opinion of management, our financial statements reflect all adjustments, which are of a normal recurring nature, necessary for presentation of financial statements for interim periods in accordance with U.S. GAAP and with the instructions to Form 10-Q in Article 10 of Securities and Exchange Commission (SEC) Regulation S-X. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions about future events that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of our financial statements and the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from those estimates, and any such differences may be material to our financial statements. Our fiscal year ends on December 31. We report our interim quarterly periods on a 13-week quarter basis, ending on a Sunday. The Second Quarter , 2019 , ended June 30, 2019 , and the Second Quarter , 2018 , ended July 1, 2018 . Adoption of new accounting standards On January 1, 2019, we adopted ASC Topic 842, "Leases", and applied the modified retrospective approach to recognizing any right-of-use assets and lease liabilities. Upon adoption, we have recognized all of our leases greater than one-year in duration and greater than $5,000 fair value, on the balance sheet as right-of-use assets and lease liabilities. This has resulted in us restating the prior period comparatives and have recognized a right-of-use asset of $21.2 million at January 1, 2018, with a corresponding lease liability, split $3.1 million , recognized in Other current liabilities , and $18.1 million recognized in Other non-current liabilities . Classification as either operating or finance is based on criteria largely similar to those applied in ASC 840 but without explicit bright lines. We have made certain assumptions in judgments when applying ASC 842, those judgments of most significance are as follows: • We elected the package of practical expedients available for transition which allow us to not reassess: ◦ Whether expired or existing contracts contain leases under the new definition of a lease; ◦ Lease classification for expired or existing leases; and ◦ Whether previously capitalized initial direct costs would qualify for capitalization under ASC 842. • We did not elect to use hindsight for transition when considering judgments and estimates such as assessments of lessee options to extend or terminate a lease or purchase the underlying asset. • We did not elect to reassess whether land easements meet the definition of a lease if they were not accounted for as leases under the former rules. • For all asset classes, we elected to not recognize a right-of-use asset and lease liability for leases with a term of 12 months or less. • For all asset classes, we elected to not separate non-lease components from lease components to which they relate and have accounted for the combined lease and non-lease components as a single lease component. 1. Basis of Presentation and Responsibility for interim Financial Statements (continued) We determine if an arrangement is a lease at inception. Operating leases are included in our Consolidated Balance Sheet as Right-of-use assets from operating leases , Current operating lease liabilities and Long-term operating lease liabilities . Some of our lease agreements contain renewal options; however, we do not recognize right-of-use assets or lease liabilities for renewal periods unless it is determined that we are reasonably certain of renewing the lease at inception or when a triggering event occurs. Some of our lease agreements contain rent escalation clauses (including index-based escalations), rent holidays, capital improvement funding or other lease concessions. We recognize our minimum rental expense on a straight-line basis based on the fixed components of a lease arrangement. We amortize this expense over the term of the lease beginning with the date of initial possession, which is the date we enter the leased space and begin to make improvements in preparation for its intended use. In determining our right-of-use assets and lease liabilities, we apply a discount rate to the minimum lease payments within each lease agreement. ASC 842 requires us to use the rate of interest that a lessee would have to pay to borrow on a collateralized basis over a similar term an amount equal to the lease payments in a similar economic environment. When we cannot readily determine the discount rate implicit in the lease agreement, we utilize our incremental borrowing rate. To estimate our specific incremental borrowing rates over various tenors (ranging from one-year through 30-years), a comparable market yield curve consistent with our credit quality was calibrated to our publicly outstanding debt instruments. The standard had no impact on our results of operations or cash flows. In addition, new disclosures are provided to enable users to assess the amount, timing and uncertainty of cash flows arising from leases. Accounting standards issued but not yet effective None that will be material to the Company.

Earnings per share

Earnings per share	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Earnings per share	Earnings per share Basic earnings per share are computed by dividing net income for the period by the weighted-average number of ordinary shares outstanding, net of Treasury shares and shares held in ESOP. Diluted earnings per share are computed by dividing net income for the period by the weighted average number of ordinary shares outstanding and the dilutive ordinary shares equivalents. Basic and diluted earnings per share were calculated as follows: Second Quarter Year-to-date In millions except share and per-share data 2019 2018 2019 2018 Basic earnings: Net income / (loss) $ 3.5 $ 11.4 $ (0.3 ) $ 21.3 Weighted average number of £0.50 ordinary shares: For basic earnings per share 27,302,174 26,558,883 27,168,170 26,535,824 Dilutive effect of potential common stock 587,735 1,025,632 — 860,733 For diluted earnings per share 27,889,909 27,584,515 27,168,170 27,396,557 Earnings per share using weighted average number of ordinary shares outstanding: Basic earnings / (loss) per ordinary share $ 0.13 $ 0.43 $ (0.01 ) $ 0.80 Diluted earnings / (loss) per ordinary share $ 0.13 $ 0.41 $ (0.01 ) $ 0.78 The 2019 year-to-date basic average shares outstanding and diluted average shares outstanding were the same because the effect of potential shares of common stock was anti-dilutive since the Company generated a net loss for the period. As a result, 662,832 combined potential common stock were not included in the computation of diluted EPS.

Revenue

Revenue	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue	Revenue Disaggregated sales disclosures for the quarter ended and year-to-date ended June 30, 2019 , and July 1, 2018 , are included below and in Note 14, Segmental Information. Second Quarter 2019 2018 In millions Gas Cylinders Elektron Total Gas Cylinders Elektron Total General industrial $ 11.0 $ 28.5 $ 39.5 $ 13.8 $ 32.6 $ 46.4 Transportation 24.1 17.2 41.3 19.6 19.7 39.3 Defense and emergency 18.7 12.2 30.9 18.7 14.5 33.2 Healthcare 4.3 0.5 4.8 8.3 1.0 9.3 $ 58.1 $ 58.4 $ 116.5 $ 60.4 $ 67.8 $ 128.2 Year-to-date 2019 2018 In millions Gas Cylinders Elektron Total Gas Cylinders Elektron Total General industrial $ 24.1 $ 59.1 $ 83.2 $ 26.8 $ 61.0 $ 87.8 Transportation 45.0 36.3 81.3 36.3 37.1 73.4 Defense and emergency 37.4 22.7 60.1 41.9 28.1 70.0 Healthcare 10.0 2.3 12.3 14.7 2.0 16.7 $ 116.5 $ 120.4 $ 236.9 $ 119.7 $ 128.2 $ 247.9 The Company’s performance obligations are satisfied over time as work progresses or at a point in time. Design and tooling arrangements are the only contracts for which sales are recognized over time. Sales from these sources combined accounted for less than 3% of the Company’s sales for the quarters ended and year-to-date ended June 30, 2019 , and July 1, 2018 . All consideration from contracts with customers is included in these amounts. The following table provides information about contract receivables, contract assets and contract liabilities from contracts with customers: In millions June 30, 2019 December 31, 2018 Contract receivables $ 1.7 $ 1.5 Contract assets 1.7 2.1 Contract liabilities $ (0.6 ) $ (1.1 ) Contract assets consist of $1.7 million accrued unbilled amounts relating to tooling revenue and are recognized in prepayments and accrued income in the consolidated balance sheets. Of the $2.1 million contract assets recognized as of December 31, 2018 , $1.6 million was billed to customers and transferred to receivables as of June 30, 2019 . Contract liabilities of $0.6 million consist of advance payments and billing above costs incurred and are recognized as other current liabilities . Significant changes in contract liabilities balances during the period are as follows: In millions 2019 As at January 1, $ (1.1 ) Payments received / amounts billed (0.5 ) Costs incurred / revenue recognized 1.0 As at June 30, $ (0.6 )

Restructuring

Restructuring	6 Months Ended
	Jun. 30, 2019
Restructuring and Related Activities [Abstract]
Restructuring	Restructuring During the Second Quarter of 2019 and the year ended December 31, 2018 , we initiated and continued execution of certain business restructuring initiatives aimed at reducing our fixed cost structure and realigning our business. Initiatives during the Second Quarter of 2019 were predominantly in relation to the closure of the Gas Cylinders segment's French site and the decision to significantly reduce operations at one of Luxfer Magtech's U.S. sites within the Elektron segment. There is an expectation that further costs will be incurred during 2019. Restructuring-related costs included within Restructuring charges in the Condensed Consolidated Financial Statements by reportable segment were as follows: Second Quarter Year-to-date In millions 2019 2018 2019 2018 Severance and related costs Gas Cylinders $ 7.7 $ (0.1 ) $ 16.6 $ 0.1 Elektron — 0.4 0.1 0.9 7.7 0.3 16.7 1.0 Asset impairments Gas Cylinders 0.6 — 0.6 — Elektron 4.4 — 4.4 — 5.0 — 5.0 — Total restructuring charges 12.7 0.3 21.7 1.0 Activity related to restructuring, recorded in Other current liabilities in the consolidated balance sheets is summarized as follows: In millions 2019 Balance at January 1, $ 5.2 Costs incurred 14.2 Cash payments (12.9 ) Balance at June 30, $ 6.5

Acquisition and disposal relate

Acquisition and disposal related gains / (costs)	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Acquisition and disposal related gains / (costs)	Acquisition and disposal related gains / (costs) A gain of $2.9 million in the Second Quarter of 2019 (2018: nil ) relates the the sale of Magnesium Elektron CZ s.r.o. and has been recognized within acquisition and disposal related gains / (costs) in the consolidated statements of income. Second Quarter In millions 2019 Cash proceeds $ 5.9 Less: Cash held in business (1.3 ) Purchase price adjustment (0.2 ) Net proceeds $ 4.4 Net assets less cash (3.6 ) Profit on disposal $ 0.8 Disposal costs (0.4 ) Realized translation gain on disposal 2.5 Net profit on disposal $ 2.9 This gain was offset by a $4.6 million charge in the First Quarter of 2019 (2018: Nil ) in relation to a reimbursement of costs following the terminated Neo acquisition.

Supplementary balance sheet inf

Supplementary balance sheet information	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Supplementary balance sheet information	Supplementary balance sheet information June 30, December 31, In millions 2019 2018 Accounts and other receivables Trade receivables $ 55.6 $ 49.8 Related parties 1.1 0.9 Prepayments and accrued income 7.4 7.7 Derivative financial instruments 0.2 0.1 Other receivables 3.6 4.2 Total accounts and other receivables $ 67.9 $ 62.7 Inventories Raw materials and supplies $ 32.6 $ 30.5 Work-in-process 36.2 33.1 Finished goods 29.9 30.0 Total inventories $ 98.7 $ 93.6 Other current assets Held-for-sale assets $ 4.1 $ 10.7 Other current assets 1.6 — Total other current assets $ 5.7 $ 10.7 Property, plant and equipment, net Land, buildings and leasehold improvements $ 66.1 $ 73.3 Machinery and equipment 270.7 286.0 Construction in progress 14.9 10.1 Total property plant and equipment 351.7 369.4 Accumulated depreciation and impairment (249.4 ) (262.5 ) Total property, plant and equipment, net $ 102.3 $ 106.9 Current maturities of long-term debt and short-term borrowings Overdrafts 7.2 3.5 Total current maturities of long-term debt and short-term borrowings $ 7.2 $ 3.5 Other current liabilities Contingent liabilities $ 8.0 $ 5.3 Held-for-sale liabilities — 2.5 Derivative financial instruments 0.3 — Operating lease liability 3.5 3.5 Other current liabilities 2.2 4.1 Total other current liabilities $ 14.0 $ 15.4 Other non-current liabilities Contingent liabilities $ 1.1 $ 0.8 Operating lease liability 12.9 14.9 Other non-current liabilities 0.4 0.5 Total other non-current liabilities $ 14.4 $ 16.2 6. Supplementary balance sheet information (continued) Held-for-sale assets and liabilities Held-for-sale assets June 30, December 31, In millions 2019 2018 Property, plant and equipment $ 3.8 $ 5.5 Inventory 0.3 2.9 Accounts and other receivables — 2.3 Held-for-sale assets $ 4.1 $ 10.7 Held-for-sale liabilities Accounts payable $ — $ 2.5 Held-for-sale liabilities $ — $ 2.5 $3.7 million , (2018, 10.7 million ) of the held-for-sale assets relate to our Elektron segment, with the remaining $0.4 million relating to our Gas Cylinders segment. The held-for-sale liabilities in 2018 relate to our Elektron segment.

Goodwill and other identifiable

Goodwill and other identifiable intangible assets	6 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and other identifiable intangible assets	Goodwill and other identifiable intangible assets Changes in goodwill during 2019, were as follows: In millions Gas Cylinders Elektron Total At January 1, 2019 $ 26.3 $ 41.3 $ 67.6 Exchange difference (0.1 ) (0.1 ) (0.2 ) Balance at June 30, 2019 $ 26.2 $ 41.2 $ 67.4 Identifiable intangible assets consisted of the following: June 30, 2019 December 31, 2018 In millions Gross Accumulated amortization Net Gross Accumulated amortization Net Customer relationships $ 13.4 $ (4.2 ) $ 9.2 $ 13.4 $ (3.8 ) $ 9.6 Technology and trading related 7.8 (3.1 ) 4.7 7.9 (2.9 ) 5.0 $ 21.2 $ (7.3 ) $ 13.9 $ 21.3 $ (6.7 ) $ 14.6 Identifiable intangible asset amortization expense was $0.6 million for the Second Quarter of 2019 and 2018 , respectively. Intangible asset amortization expense during the remainder of 2019 and over the next five years is expected to be approximately $0.6 million in 2019, $1.1 million in 2020, $1.1 million in 2021, $1.1 million in 2022, $1.1 million in 2023 and $1.1 million in 2024.

Debt

Debt	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Debt	Debt Debt outstanding was as follows: In millions June 30, 2019 December 31, 2018 3.67% Loan Notes due 2021 $ 25.0 $ 25.0 4.88% Loan Notes due 2023 25.0 25.0 4.94% Loan Notes due 2026 25.0 25.0 Revolving credit facility 28.2 — Other - Bank overdraft 7.2 3.5 Unamortized debt issuance costs (1.2 ) (1.4 ) Total debt $ 109.2 $ 77.1 Less current portion $ (7.2 ) $ (3.5 ) Non-current debt $ 102.0 $ 73.6 The weighted-average interest rate on the revolving credit facility was 2.33% for the first half of 2019 and 3.58% for the full-year 2018. The maturity profile of the Company's debt, excluding unamortized issuance costs and discounts, is as follows: In millions 2019 2020 2021 2022 2023 2024 Thereafter Total Loan Notes due 2021 $ — $ — $ 25.0 $ — $ — $ — $ — $ 25.0 Loan Notes due 2023 — — — — 25.0 — — 25.0 Loan Notes due 2026 — — — — — — 25.0 25.0 Revolving credit facility — — — 28.2 — — — 28.2 Other 7.2 — — — — — — 7.2 Total debt $ 7.2 $ — $ 25.0 $ 28.2 $ 25.0 $ — $ 25.0 $ 110.4 Loan notes due and shelf facility We have been in compliance with the covenants under the Note Purchase and Private Shelf Agreement throughout all of the quarterly measurement dates from and including September 30, 2014, to June 30, 2019 . The Loan Notes due 2021, 2023 and 2026, the Shelf Facility and the Note Purchase and Private Shelf Agreement are governed by the law of the State of New York. Senior Facilities Agreement During the Second Quarter of 2019, we drew down $16.9 million on the Revolving Credit Facility and the balance outstanding at June 30, 2019 , was $28.2 million , and at December 31, 2018 , was nil . We have been in compliance with the covenants under the Senior Facilities Agreement throughout all of the quarterly measurement dates from and including September 30, 2011, to June 30, 2019 .

Derivatives and Financial Instr

Derivatives and Financial Instruments	6 Months Ended
	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Financial Instruments	Derivatives and Financial Instruments The Company's financial instruments comprise bank and other loans, senior loan notes, derivatives, trade payables deferred and deferred contingent consideration. Other than derivatives, the main purpose of these financial instruments is to raise finance for the Company's operations. The Company also has various financial assets such as trade receivables and cash and cash equivalents, which arise directly from its operations. Derivative financial instruments We are exposed to market risk during the normal course of business from changes in currency exchange rates, interest rates and commodity prices such as aluminum prices. We manage exposures through a combination of normal operating and financing activities and through the use of derivative financial instruments such as foreign currency forward purchase contracts and aluminum forward purchase contracts. We do not use market risk-sensitive instruments for trading or speculative purposes. The Company had $0.2 million and $0.1 million derivative financial instruments disclosed within Accounts and other receivables as of June 30, 2019 and December 31, 2018 , respectively. There were also $0.3 million and nil derivative financial instruments recorded in Other current liabilities at June 30, 2019 , and December 31, 2018 , respectively. The fair value of forward foreign currency exchange contracts deferred in equity was a loss of $0.8 million and a loss of $0.4 million at June 30, 2019 , and December 31, 2018 , respectively. During the Second Quarter of 2019 , $0.2 million was transferred to the Income Statement. Forward foreign currency exchange contracts The Company incurs currency transaction risk whenever one of the Company's operating subsidiaries enters into either a purchase or sales transaction in a currency other than its functional currency. Currency transaction risk is reduced by matching sales and expenses in the same currency. The Company's U.S. operations have little currency exposure, as most purchases, costs and sales are conducted in U.S. dollars. The Company's U.K. operations are exposed to exchange transaction risks, mainly because these operations sell goods priced in euros and U.S. dollars, and purchase raw materials priced in U.S. dollars and its functional currency is GBP sterling. The Company also incurs currency transaction risk if it lends currency other than its functional currency to one of its joint venture partners. At June 30, 2019, and December 31, 2018, the Company held various forward foreign currency exchange contracts designated as hedges in respect of forward sales for U.S. dollars and euros for the receipt of GBP sterling or euros. The Company also held forward foreign currency exchange contracts designated as hedges in respect of forward purchases for euros, U.S. and Canadian dollars by the sale of GBP sterling. The contract totals in GBP sterling and euros, range of maturity dates and range of exchange rates are disclosed below, with the value denominated in GBP sterling given that is the currency the majority of the contracts are held in. June 30, 2019 Sales hedges U.S. dollars Euros Contract totals/£m 2.0 8.8 Maturity dates 07/19 07/19 to 08/19 Exchange rates $1.2669 to $1.3419 €1.0949 to €1.1671 Purchase hedges U.S. dollars Euros Canadian dollars Contract totals/£m 5.4 0.9 2.6 Maturity dates 07/19 to 08/19 07/19 to 09/19 07/19 Exchange rates $1.2703 to $1.3239 €1.1112 to €1.1286 $ 1.6806 December 31, 2018 Sales hedges U.S. dollars Euros Contract totals/£m 4.8 7.2 Maturity dates 01/19 to 07/19 01/19 to 07/19 Exchange rates $1.2519 to $1.3419 €1.0949 to €1.1702 Purchase hedges U.S. dollars Euros Canadian dollars Czech koruna Contract totals/£m 7.5 1.7 2.9 0.1 Maturity dates 01/19 to 07/19 01/19 to 06/19 01/19 to 03/19 01/19 Exchange rates $1.2609 to $1.3380 €1.1074 to €1.1221 $1.7039 to $1.7416 CZK 28.4490 The above contracts are held in GBP sterling, therefore the analysis in the table has been given in GBP sterling to avoid any movements as a result of translation. 9. Derivatives and Financial Instruments (continued) Fair value of financial instruments The following methods were used to estimate the fair values of each class of financial instrument: Cash at bank and in hand / overdrafts The carrying value approximates to the fair value as a result of the short-term maturity of the instruments. Cash at bank and in hand are subject to a right to offset in the U.S. Bank loans Bank and other loans, excluding overdrafts, of $103.2 million were outstanding at June 30, 2019 , and $75.0 million were outstanding at December 31, 2018 . Bank and other loans are shown net of issue costs of $1.2 million and $1.4 million at June 30, 2019 , and December 31, 2018 , respectively, and are to be amortized to the expected maturity of the facilities. Of the bank and other loans outstanding, $28.2 million and none is variable interest rate debt and subject to floating interest rate risk, with the remainder being fixed rate debt, at June 30, 2019 , and December 31, 2018 , respectively. Forward foreign currency exchange rate contracts The fair value of these contracts was calculated by determining what the Company would be expected to receive or pay on termination of each individual contract by comparison to present market prices. LME derivative contracts The fair value of these contracts has been calculated by valuing the contracts against the equivalent forward rates quoted on the LME. Deferred contingent consideration The deferred contingent consideration is in relation to the acquisition of Truetech and Innotech (Luxfer Magtech) in 2014 and is linked to the future profitability of the entity. The Company uses the following hierarchy for determining and disclosing the fair value of financial instruments by valuation technique: Level 1: quoted (unadjusted) prices in active markets for identical assets or liabilities. Level 2: other techniques for which all inputs which have a significant effect on the recorded fair value are observable, either directly or indirectly. Level 3: techniques which use inputs which have a significant effect on the recorded fair value that are not based on observable market data. The fair values of the financial instruments of the Company at June 30, 2019 , were analyzed using the hierarchy as follows: In millions Total Level 1 Level 2 Level 3 Derivative financial assets: Foreign currency contract assets $ 0.2 $ — $ 0.2 $ — Derivative financial liabilities: Foreign currency contract liabilities (0.3 ) — (0.3 ) — Interest bearing loans and borrowings: Loan Notes due 2021 (25.0 ) — (25.0 ) — Loan Notes due 2023 (25.6 ) — (25.6 ) — Loan Notes due 2026 (26.2 ) — (26.2 ) — Revolving Credit Facility (28.2 ) — (28.2 ) — Other financial liabilities: Lease liabilities (16.4 ) — (16.4 ) — Deferred contingent consideration (0.5 ) — — (0.5 ) 9. Derivatives and Financial Instruments (continued) The following table presents the changes in Level 3 instruments for the Second Quarter ended June 30, 2019 . In millions 2019 Balance at January 1, $ 0.9 Payments made during year (0.5 ) Unwind of discount on deferred consideration 0.1 Balance at June 30, $ 0.5 Total losses for the period included in profit and loss for assets held at the end at June 30, 0.1 Change in unrealized (gains) or losses for the period included in profit and loss for assets held at the end at June 30, $ 0.1

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We manage our affairs so that we are centrally managed and controlled in the United Kingdom (“U.K.”) and therefore have our tax residency in the U.K. The provision for income taxes consists of provisions for the U.K. and international income taxes. We operate in an international environment with operations in various locations outside the U.K. Accordingly, the consolidated income tax rate is a composite rate reflecting the earnings in the various locations and the applicable rates. The effective income tax rate for the 26-week period ended June 30, 2019 , was 117% , compared to 23.3% for the 26-week period ended July 1, 2018 . The 2019 rate was adversely affected by the impact of non-deductible expenses related to the aborted acquisition of Neo Performance Materials and restructuring activities, partially offset by the non-taxable income in relation to the sale of our Czech business. We continue to actively pursue initiatives to reduce our effective tax rate. The tax rate in any quarter can be affected positively or negatively by adjustments that are required to be reported in the specific quarter of resolution. On December 22, 2017, the Tax Cuts and Jobs Act of 2017 (the “Act”) was signed into law making significant changes to the U.S. Internal Revenue Code. Changes include, but are not limited to, a corporate tax rate decrease from 35% to 21% effective for tax years beginning after December 31, 2017, the transition of U.S. international taxation from a worldwide tax system to a territorial system, and a one-time transition tax on the mandatory deemed repatriation of cumulative foreign earnings as of December 31, 2017. For 2018, the Company considered in its estimated annual effective tax rate additional provisions of the Act including changes to the deduction for executive compensation and interest expense, a tax on global intangible low-taxed income provisions (“GILTI”), the base erosion anti-abuse tax, and a deduction for foreign-derived intangible income. The Company has elected to treat tax on GILTI income as a period cost and has therefore included it in its annual estimated effective tax rate.

Pension Plans

Pension Plans	6 Months Ended
	Jun. 30, 2019
Retirement Benefits [Abstract]
Pension Plans	Pension Plans The principal defined benefit pension plan in the U.K. is the Luxfer Group Pension Plan. The Company’s other arrangements are less significant than the Luxfer Group Pension Plan, the largest being the BA Holdings, Inc. Pension Plan in the U.S. Components of net periodic benefit cost for our pension plans for the Second Quarter ended June 30, 2019, and 2018 were as follows: Second Quarter Year-to-date In millions 2019 2018 2019 2018 Net periodic benefit credit Interest cost $ 2.7 $ 2.6 $ 5.4 $ 5.3 Expected return on plan assets (3.7 ) (4.2 ) (7.5 ) (8.6 ) Amortization of: Net actuarial loss 0.7 0.7 1.4 1.3 Prior service credit (0.1 ) (0.1 ) (0.2 ) (0.2 ) Net periodic benefit credit $ (0.4 ) $ (1.0 ) $ (0.9 ) $ (2.2 ) In respect of defined contribution plans Total charge for defined contribution plans 1.2 1.2 2.4 2.6 Total charge for pension plans $ 0.8 $ 0.2 $ 1.5 $ 0.4 In accordance with ASC 715, defined benefit credit is split in the income statement, with $0.1 million (2018: $ 0.2 million ) of expenses recognized within Selling, general and administrative expenses during the second quarter of 2019 and $0.2 million (2018: $0.4 million ) year-to-date. A credit of $0.5 million (2018: $1.2 million ) has also been recognized below Operating income in the income statement during the second quarter of 2019, $1.1 million (2018: $2.6 million ) year-to-date.

Share Plans

Share Plans	6 Months Ended
	Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share Plans	Share Plans Total share-based compensation expense for the second quarter and two-quarters ended June 30, 2019 , and July 1, 2018 , was as follows: Second Quarter Year-to-date In millions 2019 2018 2019 2018 Total share-based compensation charges $ 0.8 $ 1.4 $ 3.4 $ 1.9 In March 2019, we issued our annual share-based compensation grants under the Luxfer Holdings PLC Long-Term Umbrella Incentive Plan. The total number of awards issued was approximately 200,000 and the weighted-average fair value of options granted in 2019 was estimated to be $17.70 per share. In May 2019, we issued our annual share-based compensation grants under the Luxfer Holdings PLC Non-Executive Directors Equity Incentive Plan. The total number of awards issued was approximately 4,000 and the weighted-average fair value of options granted was estimated to be $15.00 per share. The following table illustrates the assumptions used in deriving the fair value of share options granted during 2019 and the year-ended December 31, 2018 ,: 2019 2018 Dividend yield (%) 4.00 4.00 Expected volatility range (%) 22.65 22.65 - 35.77 Risk-free interest rate (%) 0.12 0.12 - 2.57 Expected life of share options range (years) 1.00 - 4.00 0.50 - 6.00 Weighted average exercise price ($) $0.89 $0.65 Model used Black-Scholes & Monte-Carlo Black-Scholes & Monte-Carlo The expected life of the share options is based on historical data and current expectations, and is not necessarily indicative of exercise patterns that may occur. The expected volatility reflects the assumption that the historical volatility over a period similar to the life of the options is indicative of future trends, which may not necessarily be the actual outcome.

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Shareholders' Equity	Shareholders' Equity Dividends paid and proposed Second quarter Year-to-date In millions 2019 2018 2019 2018 Dividends declared and paid during the year: Interim dividend paid February 7, 2018 ($0.125 per ordinary share) $ — $ — $ — $ 3.4 Interim dividend paid May 2, 2018 ($0.125 per ordinary share) — 3.3 — 3.3 Interim dividend paid February 6, 2019 ($0.125 per ordinary share) — — 3.4 — Interim dividend paid May 1, 2019 ($0.125 per ordinary share) 3.4 — 3.4 — $ 3.4 $ 3.3 $ 6.8 $ 6.7 In millions 2019 2018 Dividends declared after the period, (not recognized as a liability as at the period end): Interim dividend declared July 2, and paid August 1, 2018: ($0.125 per ordinary share) $ — $ 3.3 Interim dividend declared July 1, and to be paid August 1, 2019: ($0.125 per ordinary share) 3.4 — $ 3.4 $ 3.3

Segmental Information

Segmental Information	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Segmental Information	Segmental Information We classify our operations into two core business segments, Gas Cylinders and Elektron, based primarily on shared economic characteristics for the nature of the products and services; the nature of the production processes; the type or class of customer for their products and services; the methods used to distribute their products or provide their services; and the nature of the regulatory environment. The Company has six identified business units, which aggregate into the two reportable segments. Luxfer Gas Cylinders and Luxfer Superform aggregate into the Gas Cylinders segment, and Luxfer MEL Technologies, Luxfer Magtech, Luxfer Graphic Arts and Luxfer Czech Republic (1) aggregate into the Elektron segment. A summary of the operations of the segments is provided below: Gas Cylinders segment Our Gas Cylinders segment manufactures and markets specialized products using aluminum, titanium and carbon composites, including pressurized cylinders for use in various applications including self-contained breathing apparatus (SCBA) for firefighters, containment of oxygen and other medical gases for healthcare, alternative fuel vehicles, and general industrial. The segment also forms lightweight aluminum and titanium panels into highly complex shapes that are used mainly in the transportation industry. Elektron segment Our Elektron segment focuses on specialty materials based primarily on magnesium and zirconium, with key product lines including advanced lightweight magnesium alloys with a variety of uses across a variety of industries; magnesium powders for use in countermeasure flares, as well as heater meals; photoengraving plates for graphic arts; and high-performance zirconium-based materials and oxides used as catalysts and in the manufacture of advanced ceramics, fiber-optic fuel cells, and many other performance products. Other Other primarily represents unallocated corporate expense and includes non-service related defined benefit pension cost / credit. Management monitors the operating results of its reportable segments separately for the purpose of making decisions about resource allocation and performance assessment. Segment performance is evaluated by the chief operating decision maker, who is responsible for allocating resources and assessing performance of the operating segments as the CEO, using adjusted EBITA (2) and adjusted EBITDA, which we defined as segment income and is based on operating income adjusted for share-based compensation expense; qualifying restructuring charges; impairment charges; acquisition and disposal related gains and costs; loss on disposal of property, plant and equipment; depreciation and amortization; and unwind of discount on deferred consideration. 14. Segmental Information (continued) Unallocated assets and liabilities include those which are held on behalf of the Company and cannot be allocated to a segment, such as taxation, investments, cash, retirement benefits obligations, bank and other loans and holding company assets and liabilities. Financial information by reportable segment for the Second Quarter and year-to-date ended June 30, 2019 , and July 1, 2018 , is included in the following summary: Net sales Adjusted EBITDA Second Quarter Year-to-date Second Quarter Year-to-date In millions 2019 2018 2019 2018 2019 2018 2019 2018 Gas Cylinders segment $ 58.1 $ 60.4 $ 116.5 $ 119.7 $ 7.1 $ 5.0 $ 11.6 $ 11.0 Elektron segment 58.4 67.8 120.4 128.2 13.1 16.4 27.1 29.6 Consolidated $ 116.5 $ 128.2 $ 236.9 $ 247.9 $ 20.2 $ 21.4 $ 38.7 $ 40.6 Depreciation and amortization Restructuring charges Second Quarter Year-to-date Second Quarter Year-to-date In millions 2019 2018 2019 2018 2019 2018 2019 2018 Gas Cylinders segment $ 1.4 $ 1.9 $ 2.8 $ 3.9 $ 8.3 $ (0.1 ) $ 17.2 $ 0.1 Elektron segment 2.6 3.0 4.9 5.9 4.4 0.4 4.5 0.9 Consolidated $ 4.0 $ 4.9 $ 7.7 $ 9.8 $ 12.7 $ 0.3 $ 21.7 $ 1.0 Total assets Capital expenditures June 30, December 31, Second Quarter Year-to-date In millions 2019 2018 2019 2018 2019 2018 Gas Cylinders segment $ 161.5 $ 156.3 $ 1.3 $ 0.3 $ 2.4 $ 0.7 Elektron segment 214.2 218.2 2.6 2.1 5.2 3.1 Other 36.4 34.3 — — — — $ 412.1 $ 408.8 $ 3.9 $ 2.4 $ 7.6 $ 3.8 Property, plant and equipment, net June 30, December 31, In millions 2019 2018 United States $ 59.4 $ 66.1 United Kingdom 37.9 36.0 Rest of Europe 1.0 1.1 Asia Pacific 0.3 0.3 Other (2) 3.7 3.4 $ 102.3 $ 106.9 (1) The Luxfer Czech Republic business unit was sold at the end of the Second Quarter of 2019. Its results of operations are included within the current quarter and year-to-date figures. (2) Adjusted EBITA is adjusted EBITDA less depreciation and loss on disposal of property, plant and equipment. 14. Segmental Information (continued) The following table presents a reconciliation of Adjusted EBITDA to net income: Second Quarter Year-to-date In millions 2019 2018 2019 2018 Adjusted EBITDA $ 20.2 $ 21.4 $ 38.7 $ 40.6 Other share-based compensation charges (0.8 ) (1.4 ) (3.4 ) (1.9 ) Depreciation and amortization (4.0 ) (4.9 ) (7.7 ) (9.8 ) Unwind discount on deferred consideration (0.1 ) (0.2 ) (0.1 ) (0.3 ) Restructuring charges (12.7 ) (0.3 ) (21.7 ) (1.0 ) Fair value adjustment to held-for-sale assets — — 0.2 — Acquisition and disposal related gains / (costs) 2.9 — (1.7 ) — Defined benefits pension mark-to-market gain 0.5 1.2 1.1 2.6 Interest expense, net (1.1 ) (1.0 ) (2.2 ) (2.5 ) Provision for income taxes (1.4 ) (3.4 ) (3.5 ) (6.4 ) Net income $ 3.5 $ 11.4 $ (0.3 ) $ 21.3 The following tables present certain geographic information by geographic region for the Second Quarter and Year-to-date, ended June 30, 2019 and July 1, 2018, respectively: Net Sales (1) Second Quarter Year-to-date 2019 2018 2019 2018 $M Percent $M Percent $M Percent $M Percent United States $ 63.0 54.0 % $ 65.9 51.5 % $ 124.4 52.5 % $ 128.2 51.8 % U.K. 9.1 7.8 % 11.8 9.2 % 20.6 8.7 % 23.4 9.4 % Germany 5.8 5.0 % 9.6 7.5 % 14.0 5.9 % 21.0 8.5 % Italy 5.2 4.5 % 4.8 3.7 % 11.7 4.9 % 10.1 4.1 % France 4.2 3.6 % 4.1 3.2 % 9.4 4.0 % 9.0 3.6 % Top five countries $ 87.3 74.9 % $ 96.2 75.1 % $ 180.1 76.0 % $ 191.7 77.4 % Rest of Europe 10.1 8.7 % 9.8 7.6 % 21.9 9.2 % 17.4 7.0 % Asia Pacific 12.7 10.9 % 15.8 12.3 % 24.3 10.3 % 26.4 10.6 % Other (2) 6.4 5.5 % 6.4 5.0 % 10.6 4.5 % 12.4 5.0 % $ 116.5 $ 128.2 $ 236.9 $ 247.9 (1) Net sales are based on the geographic destination of sale. (2) Other includes Canada, South America, Latin America and Africa.

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	Leases We have operating leases for buildings, vehicles and certain equipment. The majority of our leases have remaining lease terms of one to nine years , with one building having 54 years remaining. The components of lease expense were as follows: Second Quarter Year-to-date In millions 2019 2018 2019 2018 Operating lease cost $ 1.1 $ 1.0 $ 2.2 $ 1.9 None of our leases were classified as finance leases in 2019 or 2018. Supplemental cash flow information related to leases was as follows: Second Quarter Year-to-date In millions 2019 2018 2019 2018 Operating cash flows from operating leases $ 1.1 $ 1.0 $ 2.2 $ 1.9 15. Leases (continued) Supplemental balance sheet information related to leases was as follows: June 30, December 31, In millions 2019 2018 Operating leases Operating lease right-of-use asset $ 16.4 $ 18.4 Other current liabilities 3.5 3.5 Other non-current liabilities 12.9 14.9 $ 16.4 $ 18.4 Weighted Average Remaining Lease Term (Years) 3.6 3.7 Weighted Average Discount Rate 4.46 % 4.46 % Maturities of lease liabilities were as follows: In millions 2019 2019 (excluding the first quarter of 2019) $ 2.1 2020 3.9 2021 3.1 2022 2.1 2023 1.5 2024 1.2 Thereafter 9.7 Total lease payments $ 23.6 Less imputed interest (7.2 ) Total $ 16.4

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Committed banking facilities At June 30, 2019 , and December 31, 2018 , the Company had committed banking facilities of $150.0 million . The facilities were for providing loans and overdrafts, with a separate facility for letters of credit which at June 30, 2019 and December 31,2018, was £7.0 million ( $8.9 million ). Of the committed facilities, $7.2 million was drawn for overdrafts, no loans were drawn and no letters of credit were utilized at June 30, 2019 , $3.5 million , nil and nil at December 31, 2018 . The Company also has a separate bonding facility for bank guarantees denominated in GBP sterling of £3.0 million ( $3.8 million ), of which GBP sterling of £1.0 million ( $1.4 million ) was utilized at June 30, 2019 , and December 31, 2018 , respectively. Contingencies During February 2014, a cylinder was sold to a long-term customer and ruptured at one of their gas facilities. As a result of this rupture, three people were noted to have minor injuries such as loss of hearing. There was no major damage to assets of the customer. A claim was launched by the three people who were injured in the incident and a prosecutor has been appointed. We had reviewed our quality control checks from around the time which the cylinder was produced and no instances of failures were noted. It has also been noted by the investigator that the customer has poor quality and safety checks. As a result, we do not believe that we are liable for the incident, and therefore, do not currently expect this case to have a material impact on the Company's financial position or results of operations.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In July 2019, the Company commenced a planned project to remove low-level naturally occurring radioactive material (NORM) from a redundant building at its Manchester, UK site. The work represents remediation of a historic environmental issue, is expected to complete in the second quarter of 2020 and incur costs estimated at $2.6 million .

Basis of Presentation and Res_2

Basis of Presentation and Responsibility for interim Financial Statements (Policies)	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of presentation	We prepared the accompanying unaudited condensed consolidated financial statements of Luxfer Holdings PLC and all wholly-owned, majority owned or otherwise controlled subsidiaries on the same basis as our annual audited financial statements, except for the adoption for Accounting Standards Codification ("ASC") Topic 842, "Leases". We condensed or omitted certain information and footnote disclosures normally included in our annual audited financial statements, which we prepared in accordance with U.S. Generally Accepted Accounting Principles (GAAP). Our quarterly financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2018. As used in this report, the terms "we," "us," "our," "Luxfer" and "the Company" mean Luxfer Holdings PLC and its subsidiaries, unless the context indicates another meaning. In the opinion of management, our financial statements reflect all adjustments, which are of a normal recurring nature, necessary for presentation of financial statements for interim periods in accordance with U.S. GAAP and with the instructions to Form 10-Q in Article 10 of Securities and Exchange Commission (SEC) Regulation S-X. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions about future events that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of our financial statements and the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from those estimates, and any such differences may be material to our financial statements.
Fiscal year	Our fiscal year ends on December 31. We report our interim quarterly periods on a 13-week quarter basis, ending on a Sunday. The Second Quarter , 2019 , ended June 30, 2019 , and the Second Quarter , 2018 , ended July 1, 2018 .
Adoption of new accounting standards and Accounting standards issued but not yet effective	Adoption of new accounting standards On January 1, 2019, we adopted ASC Topic 842, "Leases", and applied the modified retrospective approach to recognizing any right-of-use assets and lease liabilities. Upon adoption, we have recognized all of our leases greater than one-year in duration and greater than $5,000 fair value, on the balance sheet as right-of-use assets and lease liabilities. This has resulted in us restating the prior period comparatives and have recognized a right-of-use asset of $21.2 million at January 1, 2018, with a corresponding lease liability, split $3.1 million , recognized in Other current liabilities , and $18.1 million recognized in Other non-current liabilities . Classification as either operating or finance is based on criteria largely similar to those applied in ASC 840 but without explicit bright lines. We have made certain assumptions in judgments when applying ASC 842, those judgments of most significance are as follows: • We elected the package of practical expedients available for transition which allow us to not reassess: ◦ Whether expired or existing contracts contain leases under the new definition of a lease; ◦ Lease classification for expired or existing leases; and ◦ Whether previously capitalized initial direct costs would qualify for capitalization under ASC 842. • We did not elect to use hindsight for transition when considering judgments and estimates such as assessments of lessee options to extend or terminate a lease or purchase the underlying asset. • We did not elect to reassess whether land easements meet the definition of a lease if they were not accounted for as leases under the former rules. • For all asset classes, we elected to not recognize a right-of-use asset and lease liability for leases with a term of 12 months or less. • For all asset classes, we elected to not separate non-lease components from lease components to which they relate and have accounted for the combined lease and non-lease components as a single lease component. 1. Basis of Presentation and Responsibility for interim Financial Statements (continued) We determine if an arrangement is a lease at inception. Operating leases are included in our Consolidated Balance Sheet as Right-of-use assets from operating leases , Current operating lease liabilities and Long-term operating lease liabilities . Some of our lease agreements contain renewal options; however, we do not recognize right-of-use assets or lease liabilities for renewal periods unless it is determined that we are reasonably certain of renewing the lease at inception or when a triggering event occurs. Some of our lease agreements contain rent escalation clauses (including index-based escalations), rent holidays, capital improvement funding or other lease concessions. We recognize our minimum rental expense on a straight-line basis based on the fixed components of a lease arrangement. We amortize this expense over the term of the lease beginning with the date of initial possession, which is the date we enter the leased space and begin to make improvements in preparation for its intended use. In determining our right-of-use assets and lease liabilities, we apply a discount rate to the minimum lease payments within each lease agreement. ASC 842 requires us to use the rate of interest that a lessee would have to pay to borrow on a collateralized basis over a similar term an amount equal to the lease payments in a similar economic environment. When we cannot readily determine the discount rate implicit in the lease agreement, we utilize our incremental borrowing rate. To estimate our specific incremental borrowing rates over various tenors (ranging from one-year through 30-years), a comparable market yield curve consistent with our credit quality was calibrated to our publicly outstanding debt instruments. The standard had no impact on our results of operations or cash flows. In addition, new disclosures are provided to enable users to assess the amount, timing and uncertainty of cash flows arising from leases. Accounting standards issued but not yet effective None that will be material to the Company.

Earnings per share (Tables)

Earnings per share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Schedule of Earnings Per Share	Basic and diluted earnings per share were calculated as follows: Second Quarter Year-to-date In millions except share and per-share data 2019 2018 2019 2018 Basic earnings: Net income / (loss) $ 3.5 $ 11.4 $ (0.3 ) $ 21.3 Weighted average number of £0.50 ordinary shares: For basic earnings per share 27,302,174 26,558,883 27,168,170 26,535,824 Dilutive effect of potential common stock 587,735 1,025,632 — 860,733 For diluted earnings per share 27,889,909 27,584,515 27,168,170 27,396,557 Earnings per share using weighted average number of ordinary shares outstanding: Basic earnings / (loss) per ordinary share $ 0.13 $ 0.43 $ (0.01 ) $ 0.80 Diluted earnings / (loss) per ordinary share $ 0.13 $ 0.41 $ (0.01 ) $ 0.78

Revenue (Tables)

Revenue (Tables)	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	Disaggregated sales disclosures for the quarter ended and year-to-date ended June 30, 2019 , and July 1, 2018 , are included below and in Note 14, Segmental Information. Second Quarter 2019 2018 In millions Gas Cylinders Elektron Total Gas Cylinders Elektron Total General industrial $ 11.0 $ 28.5 $ 39.5 $ 13.8 $ 32.6 $ 46.4 Transportation 24.1 17.2 41.3 19.6 19.7 39.3 Defense and emergency 18.7 12.2 30.9 18.7 14.5 33.2 Healthcare 4.3 0.5 4.8 8.3 1.0 9.3 $ 58.1 $ 58.4 $ 116.5 $ 60.4 $ 67.8 $ 128.2 Year-to-date 2019 2018 In millions Gas Cylinders Elektron Total Gas Cylinders Elektron Total General industrial $ 24.1 $ 59.1 $ 83.2 $ 26.8 $ 61.0 $ 87.8 Transportation 45.0 36.3 81.3 36.3 37.1 73.4 Defense and emergency 37.4 22.7 60.1 41.9 28.1 70.0 Healthcare 10.0 2.3 12.3 14.7 2.0 16.7 $ 116.5 $ 120.4 $ 236.9 $ 119.7 $ 128.2 $ 247.9
Schedule of Contract Assets and Liabilities	Significant changes in contract liabilities balances during the period are as follows: In millions 2019 As at January 1, $ (1.1 ) Payments received / amounts billed (0.5 ) Costs incurred / revenue recognized 1.0 As at June 30, $ (0.6 ) The following table provides information about contract receivables, contract assets and contract liabilities from contracts with customers: In millions June 30, 2019 December 31, 2018 Contract receivables $ 1.7 $ 1.5 Contract assets 1.7 2.1 Contract liabilities $ (0.6 ) $ (1.1 )

Restructuring (Tables)

Restructuring (Tables)	6 Months Ended
	Jun. 30, 2019
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs	Restructuring-related costs included within Restructuring charges in the Condensed Consolidated Financial Statements by reportable segment were as follows: Second Quarter Year-to-date In millions 2019 2018 2019 2018 Severance and related costs Gas Cylinders $ 7.7 $ (0.1 ) $ 16.6 $ 0.1 Elektron — 0.4 0.1 0.9 7.7 0.3 16.7 1.0 Asset impairments Gas Cylinders 0.6 — 0.6 — Elektron 4.4 — 4.4 — 5.0 — 5.0 — Total restructuring charges 12.7 0.3 21.7 1.0
Schedule of Restructuring Reserve	Activity related to restructuring, recorded in Other current liabilities in the consolidated balance sheets is summarized as follows: In millions 2019 Balance at January 1, $ 5.2 Costs incurred 14.2 Cash payments (12.9 ) Balance at June 30, $ 6.5

Acquisition and disposal rela_2

Acquisition and disposal related gains / (costs) (Tables)	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Schedule of Disposal Group	Second Quarter In millions 2019 Cash proceeds $ 5.9 Less: Cash held in business (1.3 ) Purchase price adjustment (0.2 ) Net proceeds $ 4.4 Net assets less cash (3.6 ) Profit on disposal $ 0.8 Disposal costs (0.4 ) Realized translation gain on disposal 2.5 Net profit on disposal $ 2.9 Held-for-sale assets and liabilities Held-for-sale assets June 30, December 31, In millions 2019 2018 Property, plant and equipment $ 3.8 $ 5.5 Inventory 0.3 2.9 Accounts and other receivables — 2.3 Held-for-sale assets $ 4.1 $ 10.7 Held-for-sale liabilities Accounts payable $ — $ 2.5 Held-for-sale liabilities $ — $ 2.5

Supplementary balance sheet i_2

Supplementary balance sheet information (Tables)	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Condensed Balance Sheet	June 30, December 31, In millions 2019 2018 Accounts and other receivables Trade receivables $ 55.6 $ 49.8 Related parties 1.1 0.9 Prepayments and accrued income 7.4 7.7 Derivative financial instruments 0.2 0.1 Other receivables 3.6 4.2 Total accounts and other receivables $ 67.9 $ 62.7 Inventories Raw materials and supplies $ 32.6 $ 30.5 Work-in-process 36.2 33.1 Finished goods 29.9 30.0 Total inventories $ 98.7 $ 93.6 Other current assets Held-for-sale assets $ 4.1 $ 10.7 Other current assets 1.6 — Total other current assets $ 5.7 $ 10.7 Property, plant and equipment, net Land, buildings and leasehold improvements $ 66.1 $ 73.3 Machinery and equipment 270.7 286.0 Construction in progress 14.9 10.1 Total property plant and equipment 351.7 369.4 Accumulated depreciation and impairment (249.4 ) (262.5 ) Total property, plant and equipment, net $ 102.3 $ 106.9 Current maturities of long-term debt and short-term borrowings Overdrafts 7.2 3.5 Total current maturities of long-term debt and short-term borrowings $ 7.2 $ 3.5 Other current liabilities Contingent liabilities $ 8.0 $ 5.3 Held-for-sale liabilities — 2.5 Derivative financial instruments 0.3 — Operating lease liability 3.5 3.5 Other current liabilities 2.2 4.1 Total other current liabilities $ 14.0 $ 15.4 Other non-current liabilities Contingent liabilities $ 1.1 $ 0.8 Operating lease liability 12.9 14.9 Other non-current liabilities 0.4 0.5 Total other non-current liabilities $ 14.4 $ 16.2
Schedule of Current Held-for-Sale Assets and Liabilities	Second Quarter In millions 2019 Cash proceeds $ 5.9 Less: Cash held in business (1.3 ) Purchase price adjustment (0.2 ) Net proceeds $ 4.4 Net assets less cash (3.6 ) Profit on disposal $ 0.8 Disposal costs (0.4 ) Realized translation gain on disposal 2.5 Net profit on disposal $ 2.9 Held-for-sale assets and liabilities Held-for-sale assets June 30, December 31, In millions 2019 2018 Property, plant and equipment $ 3.8 $ 5.5 Inventory 0.3 2.9 Accounts and other receivables — 2.3 Held-for-sale assets $ 4.1 $ 10.7 Held-for-sale liabilities Accounts payable $ — $ 2.5 Held-for-sale liabilities $ — $ 2.5

Goodwill and other identifiab_2

Goodwill and other identifiable intangible assets (Tables)	6 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Changes in goodwill during 2019, were as follows: In millions Gas Cylinders Elektron Total At January 1, 2019 $ 26.3 $ 41.3 $ 67.6 Exchange difference (0.1 ) (0.1 ) (0.2 ) Balance at June 30, 2019 $ 26.2 $ 41.2 $ 67.4
Schedule of Intangible Assets	Identifiable intangible assets consisted of the following: June 30, 2019 December 31, 2018 In millions Gross Accumulated amortization Net Gross Accumulated amortization Net Customer relationships $ 13.4 $ (4.2 ) $ 9.2 $ 13.4 $ (3.8 ) $ 9.6 Technology and trading related 7.8 (3.1 ) 4.7 7.9 (2.9 ) 5.0 $ 21.2 $ (7.3 ) $ 13.9 $ 21.3 $ (6.7 ) $ 14.6

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Schedule of Debt	Debt outstanding was as follows: In millions June 30, 2019 December 31, 2018 3.67% Loan Notes due 2021 $ 25.0 $ 25.0 4.88% Loan Notes due 2023 25.0 25.0 4.94% Loan Notes due 2026 25.0 25.0 Revolving credit facility 28.2 — Other - Bank overdraft 7.2 3.5 Unamortized debt issuance costs (1.2 ) (1.4 ) Total debt $ 109.2 $ 77.1 Less current portion $ (7.2 ) $ (3.5 ) Non-current debt $ 102.0 $ 73.6
Schedule of Maturities of Company's Debt	The maturity profile of the Company's debt, excluding unamortized issuance costs and discounts, is as follows: In millions 2019 2020 2021 2022 2023 2024 Thereafter Total Loan Notes due 2021 $ — $ — $ 25.0 $ — $ — $ — $ — $ 25.0 Loan Notes due 2023 — — — — 25.0 — — 25.0 Loan Notes due 2026 — — — — — — 25.0 25.0 Revolving credit facility — — — 28.2 — — — 28.2 Other 7.2 — — — — — — 7.2 Total debt $ 7.2 $ — $ 25.0 $ 28.2 $ 25.0 $ — $ 25.0 $ 110.4

Derivatives and Financial Ins_2

Derivatives and Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	June 30, 2019 Sales hedges U.S. dollars Euros Contract totals/£m 2.0 8.8 Maturity dates 07/19 07/19 to 08/19 Exchange rates $1.2669 to $1.3419 €1.0949 to €1.1671 Purchase hedges U.S. dollars Euros Canadian dollars Contract totals/£m 5.4 0.9 2.6 Maturity dates 07/19 to 08/19 07/19 to 09/19 07/19 Exchange rates $1.2703 to $1.3239 €1.1112 to €1.1286 $ 1.6806 December 31, 2018 Sales hedges U.S. dollars Euros Contract totals/£m 4.8 7.2 Maturity dates 01/19 to 07/19 01/19 to 07/19 Exchange rates $1.2519 to $1.3419 €1.0949 to €1.1702 Purchase hedges U.S. dollars Euros Canadian dollars Czech koruna Contract totals/£m 7.5 1.7 2.9 0.1 Maturity dates 01/19 to 07/19 01/19 to 06/19 01/19 to 03/19 01/19 Exchange rates $1.2609 to $1.3380 €1.1074 to €1.1221 $1.7039 to $1.7416 CZK 28.4490
Schedule of fair values of the financial instruments	The fair values of the financial instruments of the Company at June 30, 2019 , were analyzed using the hierarchy as follows: In millions Total Level 1 Level 2 Level 3 Derivative financial assets: Foreign currency contract assets $ 0.2 $ — $ 0.2 $ — Derivative financial liabilities: Foreign currency contract liabilities (0.3 ) — (0.3 ) — Interest bearing loans and borrowings: Loan Notes due 2021 (25.0 ) — (25.0 ) — Loan Notes due 2023 (25.6 ) — (25.6 ) — Loan Notes due 2026 (26.2 ) — (26.2 ) — Revolving Credit Facility (28.2 ) — (28.2 ) — Other financial liabilities: Lease liabilities (16.4 ) — (16.4 ) — Deferred contingent consideration (0.5 ) — — (0.5 )
Schedule of changes in Level 3 instruments	The following table presents the changes in Level 3 instruments for the Second Quarter ended June 30, 2019 . In millions 2019 Balance at January 1, $ 0.9 Payments made during year (0.5 ) Unwind of discount on deferred consideration 0.1 Balance at June 30, $ 0.5 Total losses for the period included in profit and loss for assets held at the end at June 30, 0.1 Change in unrealized (gains) or losses for the period included in profit and loss for assets held at the end at June 30, $ 0.1

Pension Plans (Tables)

Pension Plans (Tables)	6 Months Ended
	Jun. 30, 2019
Retirement Benefits [Abstract]
Schedule of Net Benefit Costs	Components of net periodic benefit cost for our pension plans for the Second Quarter ended June 30, 2019, and 2018 were as follows: Second Quarter Year-to-date In millions 2019 2018 2019 2018 Net periodic benefit credit Interest cost $ 2.7 $ 2.6 $ 5.4 $ 5.3 Expected return on plan assets (3.7 ) (4.2 ) (7.5 ) (8.6 ) Amortization of: Net actuarial loss 0.7 0.7 1.4 1.3 Prior service credit (0.1 ) (0.1 ) (0.2 ) (0.2 ) Net periodic benefit credit $ (0.4 ) $ (1.0 ) $ (0.9 ) $ (2.2 ) In respect of defined contribution plans Total charge for defined contribution plans 1.2 1.2 2.4 2.6 Total charge for pension plans $ 0.8 $ 0.2 $ 1.5 $ 0.4

Share Plans (Tables)

Share Plans (Tables)	6 Months Ended
	Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Compensation Expense	Total share-based compensation expense for the second quarter and two-quarters ended June 30, 2019 , and July 1, 2018 , was as follows: Second Quarter Year-to-date In millions 2019 2018 2019 2018 Total share-based compensation charges $ 0.8 $ 1.4 $ 3.4 $ 1.9
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The following table illustrates the assumptions used in deriving the fair value of share options granted during 2019 and the year-ended December 31, 2018 ,: 2019 2018 Dividend yield (%) 4.00 4.00 Expected volatility range (%) 22.65 22.65 - 35.77 Risk-free interest rate (%) 0.12 0.12 - 2.57 Expected life of share options range (years) 1.00 - 4.00 0.50 - 6.00 Weighted average exercise price ($) $0.89 $0.65 Model used Black-Scholes & Monte-Carlo Black-Scholes & Monte-Carlo

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Schedule of Dividends Paid and Proposed	Second quarter Year-to-date In millions 2019 2018 2019 2018 Dividends declared and paid during the year: Interim dividend paid February 7, 2018 ($0.125 per ordinary share) $ — $ — $ — $ 3.4 Interim dividend paid May 2, 2018 ($0.125 per ordinary share) — 3.3 — 3.3 Interim dividend paid February 6, 2019 ($0.125 per ordinary share) — — 3.4 — Interim dividend paid May 1, 2019 ($0.125 per ordinary share) 3.4 — 3.4 — $ 3.4 $ 3.3 $ 6.8 $ 6.7 In millions 2019 2018 Dividends declared after the period, (not recognized as a liability as at the period end): Interim dividend declared July 2, and paid August 1, 2018: ($0.125 per ordinary share) $ — $ 3.3 Interim dividend declared July 1, and to be paid August 1, 2019: ($0.125 per ordinary share) 3.4 — $ 3.4 $ 3.3

Segmental Information (Tables)

Segmental Information (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Financial information by reportable segment for the Second Quarter and year-to-date ended June 30, 2019 , and July 1, 2018 , is included in the following summary: Net sales Adjusted EBITDA Second Quarter Year-to-date Second Quarter Year-to-date In millions 2019 2018 2019 2018 2019 2018 2019 2018 Gas Cylinders segment $ 58.1 $ 60.4 $ 116.5 $ 119.7 $ 7.1 $ 5.0 $ 11.6 $ 11.0 Elektron segment 58.4 67.8 120.4 128.2 13.1 16.4 27.1 29.6 Consolidated $ 116.5 $ 128.2 $ 236.9 $ 247.9 $ 20.2 $ 21.4 $ 38.7 $ 40.6 Depreciation and amortization Restructuring charges Second Quarter Year-to-date Second Quarter Year-to-date In millions 2019 2018 2019 2018 2019 2018 2019 2018 Gas Cylinders segment $ 1.4 $ 1.9 $ 2.8 $ 3.9 $ 8.3 $ (0.1 ) $ 17.2 $ 0.1 Elektron segment 2.6 3.0 4.9 5.9 4.4 0.4 4.5 0.9 Consolidated $ 4.0 $ 4.9 $ 7.7 $ 9.8 $ 12.7 $ 0.3 $ 21.7 $ 1.0 Total assets Capital expenditures June 30, December 31, Second Quarter Year-to-date In millions 2019 2018 2019 2018 2019 2018 Gas Cylinders segment $ 161.5 $ 156.3 $ 1.3 $ 0.3 $ 2.4 $ 0.7 Elektron segment 214.2 218.2 2.6 2.1 5.2 3.1 Other 36.4 34.3 — — — — $ 412.1 $ 408.8 $ 3.9 $ 2.4 $ 7.6 $ 3.8
Property, plant and equipment, net by geographic region	Property, plant and equipment, net June 30, December 31, In millions 2019 2018 United States $ 59.4 $ 66.1 United Kingdom 37.9 36.0 Rest of Europe 1.0 1.1 Asia Pacific 0.3 0.3 Other (2) 3.7 3.4 $ 102.3 $ 106.9 (1) The Luxfer Czech Republic business unit was sold at the end of the Second Quarter of 2019. Its results of operations are included within the current quarter and year-to-date figures. (2) Adjusted EBITA is adjusted EBITDA less depreciation and loss on disposal of property, plant and equipment.
Reconciliation of Operating Profit (Loss) from Segments to Consolidated	The following table presents a reconciliation of Adjusted EBITDA to net income: Second Quarter Year-to-date In millions 2019 2018 2019 2018 Adjusted EBITDA $ 20.2 $ 21.4 $ 38.7 $ 40.6 Other share-based compensation charges (0.8 ) (1.4 ) (3.4 ) (1.9 ) Depreciation and amortization (4.0 ) (4.9 ) (7.7 ) (9.8 ) Unwind discount on deferred consideration (0.1 ) (0.2 ) (0.1 ) (0.3 ) Restructuring charges (12.7 ) (0.3 ) (21.7 ) (1.0 ) Fair value adjustment to held-for-sale assets — — 0.2 — Acquisition and disposal related gains / (costs) 2.9 — (1.7 ) — Defined benefits pension mark-to-market gain 0.5 1.2 1.1 2.6 Interest expense, net (1.1 ) (1.0 ) (2.2 ) (2.5 ) Provision for income taxes (1.4 ) (3.4 ) (3.5 ) (6.4 ) Net income $ 3.5 $ 11.4 $ (0.3 ) $ 21.3
Revenue from External Customers and Long-term Assets by Geographic Areas	The following tables present certain geographic information by geographic region for the Second Quarter and Year-to-date, ended June 30, 2019 and July 1, 2018, respectively: Net Sales (1) Second Quarter Year-to-date 2019 2018 2019 2018 $M Percent $M Percent $M Percent $M Percent United States $ 63.0 54.0 % $ 65.9 51.5 % $ 124.4 52.5 % $ 128.2 51.8 % U.K. 9.1 7.8 % 11.8 9.2 % 20.6 8.7 % 23.4 9.4 % Germany 5.8 5.0 % 9.6 7.5 % 14.0 5.9 % 21.0 8.5 % Italy 5.2 4.5 % 4.8 3.7 % 11.7 4.9 % 10.1 4.1 % France 4.2 3.6 % 4.1 3.2 % 9.4 4.0 % 9.0 3.6 % Top five countries $ 87.3 74.9 % $ 96.2 75.1 % $ 180.1 76.0 % $ 191.7 77.4 % Rest of Europe 10.1 8.7 % 9.8 7.6 % 21.9 9.2 % 17.4 7.0 % Asia Pacific 12.7 10.9 % 15.8 12.3 % 24.3 10.3 % 26.4 10.6 % Other (2) 6.4 5.5 % 6.4 5.0 % 10.6 4.5 % 12.4 5.0 % $ 116.5 $ 128.2 $ 236.9 $ 247.9 (1) Net sales are based on the geographic destination of sale. (2) Other includes Canada, South America, Latin America and Africa.

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Summary of lease expense and supplemental information	The components of lease expense were as follows: Second Quarter Year-to-date In millions 2019 2018 2019 2018 Operating lease cost $ 1.1 $ 1.0 $ 2.2 $ 1.9 None of our leases were classified as finance leases in 2019 or 2018. Supplemental cash flow information related to leases was as follows: Second Quarter Year-to-date In millions 2019 2018 2019 2018 Operating cash flows from operating leases $ 1.1 $ 1.0 $ 2.2 $ 1.9 15. Leases (continued) Supplemental balance sheet information related to leases was as follows: June 30, December 31, In millions 2019 2018 Operating leases Operating lease right-of-use asset $ 16.4 $ 18.4 Other current liabilities 3.5 3.5 Other non-current liabilities 12.9 14.9 $ 16.4 $ 18.4 Weighted Average Remaining Lease Term (Years) 3.6 3.7 Weighted Average Discount Rate 4.46 % 4.46 %
Maturities of lease liabilities	Maturities of lease liabilities were as follows: In millions 2019 2019 (excluding the first quarter of 2019) $ 2.1 2020 3.9 2021 3.1 2022 2.1 2023 1.5 2024 1.2 Thereafter 9.7 Total lease payments $ 23.6 Less imputed interest (7.2 ) Total $ 16.4

Basis of Presentation and Res_3

Basis of Presentation and Responsibility for interim Financial Statements (Details) - USD ($)	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets from operating leases	$ 16,400,000		$ 18,400,000
Operating lease liability	3,500,000		3,500,000
Operating lease liability	$ 12,900,000		$ 14,900,000
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease threshold for recognition		$ 5,000
Right-of-use assets from operating leases				$ 21,200,000
Operating lease liability				3,100,000
Operating lease liability				$ 18,100,000

Earnings per share (Details)

Earnings per share (Details) $ / shares in Units, $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2019USD ($)$ / sharesshares	Mar. 31, 2019USD ($)	Jul. 01, 2018USD ($)$ / sharesshares	Apr. 01, 2018USD ($)	Jun. 30, 2019USD ($)$ / sharesshares	Jul. 01, 2018USD ($)$ / sharesshares	Jun. 30, 2019£ / shares	Dec. 31, 2018£ / shares	Jul. 01, 2018£ / shares
Basic earnings:
Net income / (loss) | $		$ 3.5	$ (3.8)	$ 11.4	$ 9.9	$ (0.3)	$ 21.3
Weighted average number of £0.50 ordinary shares:
For basic earnings per share (shares)		27,302,174		26,558,883		27,168,170	26,535,824
Dilutive effect of potential common stock (shares)		587,735		1,025,632		0	860,733
For diluted earnings per share (shares)		27,889,909		27,584,515		27,168,170	27,396,557
Earnings per share using weighted average number of ordinary shares outstanding:
Basic earnings / (loss) per ordinary share (usd per share) | $ / shares		$ 0.13		$ 0.43		$ (0.01)	$ 0.80
Diluted earnings / (loss) per ordinary share (usd per share) | $ / shares	[1]	$ 0.13		$ 0.41		$ (0.01)	$ 0.78
Class of Stock [Line Items]
Shares not included in the computation of diluted EPS (in shares)						662,832
Ordinary shares
Class of Stock [Line Items]
Common stock, par value (in GBP per share) | £ / shares								£ 0.50	£ 0.50	£ 0.50
[1]	The loss per share for 2019 year-to-date has not been diluted, since the incremental shares included in the weighted-average number of shares outstanding would have been anti-dilutive.

Revenue - Disaggregation of Rev

Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 116.5	$ 128.2	$ 236.9	$ 247.9
General industrial
Disaggregation of Revenue [Line Items]
Net sales	39.5	46.4	83.2	87.8
Transportation
Disaggregation of Revenue [Line Items]
Net sales	41.3	39.3	81.3	73.4
Defense and emergency
Disaggregation of Revenue [Line Items]
Net sales	30.9	33.2	60.1	70
Healthcare
Disaggregation of Revenue [Line Items]
Net sales	4.8	9.3	12.3	16.7
Gas Cylinders
Disaggregation of Revenue [Line Items]
Net sales	58.1	60.4	116.5	119.7
Gas Cylinders | General industrial
Disaggregation of Revenue [Line Items]
Net sales	11	13.8	24.1	26.8
Gas Cylinders | Transportation
Disaggregation of Revenue [Line Items]
Net sales	24.1	19.6	45	36.3
Gas Cylinders | Defense and emergency
Disaggregation of Revenue [Line Items]
Net sales	18.7	18.7	37.4	41.9
Gas Cylinders | Healthcare
Disaggregation of Revenue [Line Items]
Net sales	4.3	8.3	10	14.7
Elektron
Disaggregation of Revenue [Line Items]
Net sales	58.4	67.8	120.4	128.2
Elektron | General industrial
Disaggregation of Revenue [Line Items]
Net sales	28.5	32.6	59.1	61
Elektron | Transportation
Disaggregation of Revenue [Line Items]
Net sales	17.2	19.7	36.3	37.1
Elektron | Defense and emergency
Disaggregation of Revenue [Line Items]
Net sales	12.2	14.5	22.7	28.1
Elektron | Healthcare
Disaggregation of Revenue [Line Items]
Net sales	$ 0.5	$ 1	$ 2.3	$ 2

Revenue - Additional Informatio

Revenue - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue, performance obligation satisfied over time, percentage (less than)	3.00%		3.00%
Contract assets		$ 1.7		$ 2.1
Contract asset, reclassified to receivables		1.6
Contract liabilities		$ 0.6		$ 1.1

Revenue - Contract Receivables,

Revenue - Contract Receivables, Contract Assets, and Contract Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Contract receivables	$ 1.7	$ 1.5
Contract assets	1.7	2.1
Contract liabilities	$ (0.6)	$ (1.1)

Revenue - Significant Changes i

Revenue - Significant Changes in Contract Liabilities (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)
Contract With Customer, Asset (Liability) [Roll Forward]
Beginning balance	$ (1.1)
Payments received / amounts billed	(0.5)
Costs incurred / revenue recognized	1
Ending balance	$ (0.6)

Restructuring - Restructuring C

Restructuring - Restructuring Charges (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 12.7	$ 0.3	$ 21.7	$ 1
Severance and related costs
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	7.7	0.3	16.7	1
Severance and related costs | Gas Cylinders
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	7.7	(0.1)	16.6	0.1
Severance and related costs | Elektron
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	0	0.4	0.1	0.9
Asset impairments
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	5	0	5	0
Asset impairments | Gas Cylinders
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	0.6	0	0.6	0
Asset impairments | Elektron
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 4.4	$ 0	$ 4.4	$ 0

Restructuring - Restructuring R

Restructuring - Restructuring Reserve (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)
Restructuring Reserve [Roll Forward]
Beginning balance	$ 5.2
Costs incurred	14.2
Cash payments	(12.9)
Ending balance	$ 6.5

Acquisition and disposal rela_3

Acquisition and disposal related gains / (costs) (Details) - USD ($)	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jul. 01, 2018	Apr. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net profit on disposal			$ 0
Cash proceeds					$ 4,600,000	$ 0
Acquisition termination payment		$ 4,600,000		$ 0
Magnesium Elektron CZ s.r.o. | Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net profit on disposal	$ 2,900,000
Cash proceeds	5,900,000
Cash held in business	(1,300,000)				(1,300,000)
Purchase price adjustment	(200,000)				(200,000)
Net proceeds	4,400,000
Net assets less cash	(3,600,000)				$ (3,600,000)
Profit on disposal	800,000
Disposal costs	(400,000)
Realized translation gain on disposal	$ 2,500,000

Supplementary balance sheet i_3

Supplementary balance sheet information - Schedule of Condensed Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Accounts and other receivables
Trade receivables	$ 55.6	$ 49.8
Related parties	1.1	0.9
Prepayments and accrued income	7.4	7.7
Derivative financial instruments	0.2	0.1
Other receivables	3.6	4.2
Total accounts and other receivables	67.9	62.7
Inventories
Raw materials and supplies	32.6	30.5
Work-in-process	36.2	33.1
Finished goods	29.9	30
Total inventories	98.7	93.6
Other current assets
Held-for-sale assets	4.1	10.7
Other current assets	1.6	0
Total other current assets	5.7	10.7
Property, Plant and Equipment [Abstract]
Total property plant and equipment	351.7	369.4
Accumulated depreciation and impairment	(249.4)	(262.5)
Total property, plant and equipment, net	102.3	106.9
Current maturities of long-term debt and short-term borrowings
Overdrafts	7.2	3.5
Total current maturities of long-term debt and short-term borrowings	7.2	3.5
Other current liabilities
Contingent liabilities	8	5.3
Held-for-sale liabilities	0	2.5
Derivative financial instruments	0.3	0
Operating lease liability	3.5	3.5
Other current liabilities	2.2	4.1
Total other current liabilities	14	15.4
Other non-current liabilities
Contingent liabilities	1.1	0.8
Operating lease liability	12.9	14.9
Other non-current liabilities	0.4	0.5
Total other non-current liabilities	14.4	16.2
Land, buildings and leasehold improvements
Property, Plant and Equipment [Abstract]
Total property plant and equipment	66.1	73.3
Machinery and equipment
Property, Plant and Equipment [Abstract]
Total property plant and equipment	270.7	286
Construction in progress
Property, Plant and Equipment [Abstract]
Total property plant and equipment	$ 14.9	$ 10.1

Supplementary balance sheet i_4

Supplementary balance sheet information - Held-for-Sale Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Held-for-sale assets
Held-for-sale assets	$ 4.1	$ 10.7
Held-for-sale liabilities
Held-for-sale liabilities	0	2.5
Held-for-sale
Held-for-sale assets
Property, plant and equipment	3.8	5.5
Inventory	0.3	2.9
Accounts and other receivables	0	2.3
Held-for-sale assets	4.1	10.7
Held-for-sale liabilities
Accounts payable	0	2.5
Held-for-sale liabilities	0	2.5
Elektron | Held-for-sale
Held-for-sale assets
Held-for-sale assets	3.7	$ 10.7
Gas Cylinders | Held-for-sale
Held-for-sale assets
Held-for-sale assets	$ 0.4

Goodwill and other identifiab_3

Goodwill and other identifiable intangible assets - Schedule of Goodwill (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 67.6
Exchange difference	(0.2)
Ending balance	67.4
Gas Cylinders
Goodwill [Roll Forward]
Beginning balance	26.3
Exchange difference	(0.1)
Ending balance	26.2
Elektron
Goodwill [Roll Forward]
Beginning balance	41.3
Exchange difference	(0.1)
Ending balance	$ 41.2

Goodwill and other identifiab_4

Goodwill and other identifiable intangible assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets
Gross	$ 21.2	$ 21.3
Accumulated amortization	(7.3)	(6.7)
Net	13.9	14.6
Customer relationships
Finite-Lived Intangible Assets
Gross	13.4	13.4
Accumulated amortization	(4.2)	(3.8)
Net	9.2	9.6
Technology and trading related
Finite-Lived Intangible Assets
Gross	7.8	7.9
Accumulated amortization	(3.1)	(2.9)
Net	$ 4.7	$ 5

Goodwill and other identifiab_5

Goodwill and other identifiable intangible assets - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Identifiable intangible asset amortization expense	$ 0.6	$ 0.6	$ 0.6	$ 0.6
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity
2019	0.6		0.6
2020	1.1		1.1
2021	1.1		1.1
2022	1.1		1.1
2023	1.1		1.1
2024	$ 1.1		$ 1.1

Debt - Schedule of Debt Outstan

Debt - Schedule of Debt Outstanding (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term debt, gross	$ 110.4
Unamortized debt issuance costs	(1.2)	$ (1.4)
Total debt	109.2	77.1
Less current portion	(7.2)	(3.5)
Non-current debt	102	73.6
Other - Bank overdraft
Debt Instrument [Line Items]
Long-term debt, gross	7.2	3.5
Loan Notes | Loan Notes due 2021
Debt Instrument [Line Items]
Long-term debt, gross	$ 25	25
Debt stated interest rate	3.67%
Loan Notes | Loan Notes due 2023
Debt Instrument [Line Items]
Long-term debt, gross	$ 25	25
Debt stated interest rate	4.88%
Loan Notes | Loan Notes due 2026
Debt Instrument [Line Items]
Long-term debt, gross	$ 25	25
Debt stated interest rate	4.94%
Revolving credit facility
Debt Instrument [Line Items]
Long-term debt, gross	$ 28.2	$ 0

Debt - Additional Information (

Debt - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Amount drew down during the period, on line of credit	$ 16.9
Long-term debt, gross	$ 110.4
Revolving credit facility
Debt Instrument [Line Items]
Debt, weighted average interest rate	2.33%	3.58%
Long-term debt, gross	$ 28.2	$ 0

Debt - Schedule of Maturities o

Debt - Schedule of Maturities of Company's Debt (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
2019	$ 7.2
2020	0
2021	25
2022	28.2
2023	25
2024	0
Thereafter	25
Total	110.4
Other
Debt Instrument [Line Items]
2019	7.2
2020	0
2021	0
2022	0
2023	0
2024	0
Thereafter	0
Total	7.2	$ 3.5
Loan Notes | Loan Notes due 2021
Debt Instrument [Line Items]
2019	0
2020	0
2021	25
2022	0
2023	0
2024	0
Thereafter	0
Total	25	25
Loan Notes | Loan Notes due 2023
Debt Instrument [Line Items]
2019	0
2020	0
2021	0
2022	0
2023	25
2024	0
Thereafter	0
Total	25	25
Loan Notes | Loan Notes due 2026
Debt Instrument [Line Items]
2019	0
2020	0
2021	0
2022	0
2023	0
2024	0
Thereafter	25
Total	25	25
Revolving credit facility
Debt Instrument [Line Items]
2019	0
2020	0
2021	0
2022	28.2
2023	0
2024	0
Thereafter	0
Total	$ 28.2	$ 0

Derivatives and Financial Ins_3

Derivatives and Financial Instruments - Additional Information (Details) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Derivative loss deferred in equity		$ 800,000	$ 400,000
Derivative (loss) gain transferred to consolidated income statement	$ 200,000
Long-term debt outstanding	109,200,000	109,200,000	77,100,000
Debt issuance costs	1,200,000	1,200,000	1,400,000
Variable interest rate debt	28,200,000	28,200,000	0
Accounts and Other Receivables
Derivative [Line Items]
Derivative financial assets	200,000	200,000	100,000
Other Current Liabilities
Derivative [Line Items]
Derivative financial liabilities	300,000	300,000	0
Bank and other loans
Derivative [Line Items]
Long-term debt outstanding	$ 103,200,000	$ 103,200,000	$ 75,000,000

Derivatives and Financial Ins_4

Derivatives and Financial Instruments - Schedule of Derivative Instruments (Details) - Designated as Hedging Instrument £ in Millions	Jun. 30, 2019GBP (£)$ / £€ / £$ / £	Dec. 31, 2018GBP (£)$ / £€ / £Kč / £$ / £
U.S. dollars | Sales hedges
Derivative [Line Items]
Contract totals/£m | £	£ 2	£ 4.8
U.S. dollars | Sales hedges | Minimum
Derivative [Line Items]
Exchange rates	1.2669	1.2519
U.S. dollars | Sales hedges | Maximum
Derivative [Line Items]
Exchange rates	1.3419	1.3419
U.S. dollars | Purchase hedges
Derivative [Line Items]
Contract totals/£m | £	£ 5.4	£ 7.5
U.S. dollars | Purchase hedges | Minimum
Derivative [Line Items]
Exchange rates	1.2703	1.2609
U.S. dollars | Purchase hedges | Maximum
Derivative [Line Items]
Exchange rates	1.3239	1.3380
Euros | Sales hedges
Derivative [Line Items]
Contract totals/£m | £	£ 8.8	£ 7.2
Euros | Sales hedges | Minimum
Derivative [Line Items]
Exchange rates | € / £	1.0949	1.0949
Euros | Sales hedges | Maximum
Derivative [Line Items]
Exchange rates | € / £	1.1671	1.1702
Euros | Purchase hedges
Derivative [Line Items]
Contract totals/£m | £	£ 0.9	£ 1.7
Euros | Purchase hedges | Minimum
Derivative [Line Items]
Exchange rates | € / £	1.1112	1.1074
Euros | Purchase hedges | Maximum
Derivative [Line Items]
Exchange rates | € / £	1.1286	1.1221
Canadian dollars | Purchase hedges
Derivative [Line Items]
Contract totals/£m | £	£ 2.6	£ 2.9
Exchange rates	1.6806
Canadian dollars | Purchase hedges | Minimum
Derivative [Line Items]
Exchange rates		1.7039
Canadian dollars | Purchase hedges | Maximum
Derivative [Line Items]
Exchange rates		1.7416
Czech koruna | Purchase hedges
Derivative [Line Items]
Contract totals/£m | £		£ 0.1
Exchange rates | Kč / £		28.4490

Derivatives and Financial Ins_5

Derivatives and Financial Instruments - Fair Values of Financial Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Lease liabilities	$ (16.4)	$ (18.4)
Deferred contingent consideration	(0.5)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Lease liabilities	0
Deferred contingent consideration	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Lease liabilities	(16.4)
Deferred contingent consideration	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Lease liabilities	0
Deferred contingent consideration	(0.5)
Foreign currency contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	0.2
Foreign currency contract liabilities	(0.3)
Foreign currency contract | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	0
Foreign currency contract liabilities	0
Foreign currency contract | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	0.2
Foreign currency contract liabilities	(0.3)
Foreign currency contract | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	0
Foreign currency contract liabilities	0
Loan Notes | Loan Notes due 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest bearing loans and borrowings	(25)
Loan Notes | Loan Notes due 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest bearing loans and borrowings	(25.6)
Loan Notes | Loan Notes due 2026
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest bearing loans and borrowings	(26.2)
Loan Notes | Level 1 | Loan Notes due 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest bearing loans and borrowings	0
Loan Notes | Level 1 | Loan Notes due 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest bearing loans and borrowings	0
Loan Notes | Level 1 | Loan Notes due 2026
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest bearing loans and borrowings	0
Loan Notes | Level 2 | Loan Notes due 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest bearing loans and borrowings	(25)
Loan Notes | Level 2 | Loan Notes due 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest bearing loans and borrowings	(25.6)
Loan Notes | Level 2 | Loan Notes due 2026
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest bearing loans and borrowings	(26.2)
Loan Notes | Level 3 | Loan Notes due 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest bearing loans and borrowings	0
Loan Notes | Level 3 | Loan Notes due 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest bearing loans and borrowings	0
Loan Notes | Level 3 | Loan Notes due 2026
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest bearing loans and borrowings	0
Revolving credit facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest bearing loans and borrowings	(28.2)
Revolving credit facility | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest bearing loans and borrowings	0
Revolving credit facility | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest bearing loans and borrowings	(28.2)
Revolving credit facility | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest bearing loans and borrowings	$ 0

Derivatives and Financial Ins_6

Derivatives and Financial Instruments - Schedule of Changes in Level 3 Instruments (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1	$ 0.9
Payments made during year	(0.5)
Unwind of discount on deferred consideration	0.1
Balance at December 31	0.5
Total losses for the period included in profit and loss for assets held at the end at June 30,	0.1
Change in unrealized (gains) or losses for the period included in profit and loss for assets held at the end at June 30,	$ 0.1

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details)	6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018
Income Tax Disclosure [Abstract]
Effective income tax rate	117.00%	23.30%

Pension Plans - Schedule of Net

Pension Plans - Schedule of Net Benefit Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Retirement Benefits [Abstract]
Interest cost	$ 2.7	$ 2.6	$ 5.4	$ 5.3
Expected return on plan assets	(3.7)	(4.2)	(7.5)	(8.6)
Amortization of net actuarial loss	0.7	0.7	1.4	1.3
Amortization of prior service credit	(0.1)	(0.1)	(0.2)	(0.2)
Net periodic benefit credit	(0.4)	(1)	(0.9)	(2.2)
Total charge for defined contribution plans	1.2	1.2	2.4	2.6
Total charge for pension plans	$ 0.8	$ 0.2	$ 1.5	$ 0.4

Pension Plans - Additional Info

Pension Plans - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension credit	$ 0.4	$ 1	$ 0.9	$ 2.2
Defined benefit pension credit	0.5	1.2	1.1	2.6
Selling, General and Administrative Expenses
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension credit	$ 0.1	$ 0.2	$ 0.2	$ 0.4

Share Plans - Schedule of Share

Share Plans - Schedule of Share-based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Total share-based compensation charges	$ 0.8	$ 1.4	$ 3.4	$ 1.9

Share Plans - Additional Inform

Share Plans - Additional Information (Details) - $ / shares shares in Thousands	1 Months Ended
	May 31, 2019	Mar. 31, 2019
Long-Term Umbrella Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted during the year (in shares)		200
Granted during the year (in USD per share)		$ 17.70
Non-Executive Directors Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted during the year (in shares)	4
Granted during the year (in USD per share)	$ 15

Share Plans - Share Options Fai

Share Plans - Share Options Fair Value Assumptions (Details) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield (%)	4.00%	4.00%
Expected volatility range (%)	22.65%
Expected volatility range (%), minimum		22.65%
Expected volatility range (%), maximum		35.77%
Risk-free interest rate (%)	0.12%
Risk-free interest rate (%), minimum		0.12%
Risk-free interest rate (%), maximum		2.57%
Weighted average exercise price (in USD per share)	$ 0.89	$ 0.65
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life of share options range (years)	1 year	6 months
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life of share options range (years)	4 years	6 years

Shareholders' Equity - Schedule

Shareholders' Equity - Schedule of Dividend Paid and Proposed (Details) - USD ($) $ / shares in Units, $ in Millions	Aug. 01, 2019	May 01, 2019	Feb. 06, 2019	Aug. 01, 2018	May 02, 2018	Feb. 07, 2018	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Class of Stock [Line Items]
Dividends paid		$ 3.4	$ 3.4	$ 3.3	$ 3.3	$ 3.4	$ 3.4	$ 3.3	$ 6.8	$ 6.7
Dividends paid (in USD per share)		$ 0.125	$ 0.125	$ 0.125	$ 0.125	$ 0.125
Subsequent Event
Class of Stock [Line Items]
Dividends paid	$ 3.4
Dividends paid (in USD per share)	$ 0.125

Segmental Information - Additio

Segmental Information - Additional Information (Details)	6 Months Ended
	Jun. 30, 2019segmentdivision
Segment Reporting [Abstract]
Number of operating segments	2
Number of operating divisions | division	6
Number of reportable segments	2

Segmental Information - Financi

Segmental Information - Financial information by reportable segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net sales	$ 116.5	$ 128.2	$ 236.9	$ 247.9
Adjusted EBITDA	20.2	21.4	38.7	40.6
Depreciation and amortization	4	4.9	7.7	9.8
Restructuring charges	12.7	0.3	21.7	1
Total assets	412.1		412.1		$ 408.8
Capital expenditures	3.9	2.4	7.6	3.8
Gas Cylinders
Segment Reporting Information [Line Items]
Net sales	58.1	60.4	116.5	119.7
Adjusted EBITDA	7.1	5	11.6	11
Depreciation and amortization	1.4	1.9	2.8	3.9
Restructuring charges	8.3	(0.1)	17.2	0.1
Elektron
Segment Reporting Information [Line Items]
Net sales	58.4	67.8	120.4	128.2
Adjusted EBITDA	13.1	16.4	27.1	29.6
Depreciation and amortization	2.6	3	4.9	5.9
Restructuring charges	4.4	0.4	4.5	0.9
Operating Segments | Gas Cylinders
Segment Reporting Information [Line Items]
Total assets	161.5		161.5		156.3
Capital expenditures	1.3	0.3	2.4	0.7
Operating Segments | Elektron
Segment Reporting Information [Line Items]
Total assets	214.2		214.2		218.2
Capital expenditures	2.6	2.1	5.2	3.1
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Total assets	36.4		36.4		$ 34.3
Capital expenditures	$ 0	$ 0	$ 0	$ 0

Segmental Information - Geograp

Segmental Information - Geographic information by region (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 102.3		$ 102.3		$ 106.9
Net sales	116.5	$ 128.2	236.9	$ 247.9
Top five countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	87.3	96.2	180.1	191.7
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	59.4		59.4		66.1
Net sales	63	65.9	124.4	128.2
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	37.9		37.9		36
Net sales	9.1	11.8	20.6	23.4
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	5.8	9.6	14	21
Italy
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	5.2	4.8	11.7	10.1
France
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	4.2	4.1	9.4	9
Rest of Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	1		1		1.1
Net sales	10.1	9.8	21.9	17.4
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	0.3		0.3		0.3
Net sales	12.7	15.8	24.3	26.4
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	3.7		3.7		$ 3.4
Net sales	$ 6.4	$ 6.4	$ 10.6	$ 12.4
Geographic Concentration Risk | Revenue from Contract with Customer | Top five countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	74.90%	75.10%	76.00%	77.40%
Geographic Concentration Risk | Revenue from Contract with Customer | United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	54.00%	51.50%	52.50%	51.80%
Geographic Concentration Risk | Revenue from Contract with Customer | United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	7.80%	9.20%	8.70%	9.40%
Geographic Concentration Risk | Revenue from Contract with Customer | Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	5.00%	7.50%	5.90%	8.50%
Geographic Concentration Risk | Revenue from Contract with Customer | Italy
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	4.50%	3.70%	4.90%	4.10%
Geographic Concentration Risk | Revenue from Contract with Customer | France
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	3.60%	3.20%	4.00%	3.60%
Geographic Concentration Risk | Revenue from Contract with Customer | Rest of Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	8.70%	7.60%	9.20%	7.00%
Geographic Concentration Risk | Revenue from Contract with Customer | Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	10.90%	12.30%	10.30%	10.60%
Geographic Concentration Risk | Revenue from Contract with Customer | Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	5.50%	5.00%	4.50%	5.00%

Segmental Information - Reconci

Segmental Information - Reconciliation of consolidated segment income (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jul. 01, 2018	Apr. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Segment Reporting [Abstract]
Adjusted EBITDA	$ 20.2		$ 21.4		$ 38.7	$ 40.6
Other share-based compensation charges	(0.8)		(1.4)		(3.4)	(1.9)
Depreciation and amortization	(4)		(4.9)		(7.7)	(9.8)
Unwind discount on deferred consideration	(0.1)		(0.2)		(0.1)	(0.3)
Restructuring charges	(12.7)		(0.3)		(21.7)	(1)
Fair value adjustment to held-for-sale assets	0		0		0.2	0
Acquisition and disposal related gains / (costs)	2.9		0		(1.7)	0
Defined benefits pension mark-to-market gain	0.5		1.2		1.1	2.6
Interest expense, net	(1.1)		(1)		(2.2)	(2.5)
Provision for income taxes	(1.4)		(3.4)		(3.5)	(6.4)
Net income / (loss)	$ 3.5	$ (3.8)	$ 11.4	$ 9.9	$ (0.3)	$ 21.3

Leases - Additional Information

Leases - Additional Information (Details)	6 Months Ended
	Jun. 30, 2019
Minimum
Lessee, Lease, Description [Line Items]
Remaining term of lease	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining term of lease	9 years
Building
Lessee, Lease, Description [Line Items]
Remaining term of lease	54 years

Leases - Least Cost (Details)

Leases - Least Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Leases [Abstract]
Operating lease cost	$ 1.1	$ 1	$ 2.2	$ 1.9
Operating cash flows from operating leases	$ 1.1	$ 1	$ 2.2	$ 1.9

Leases - Supplemental balance s

Leases - Supplemental balance sheet information (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease right-of-use asset	$ 16.4	$ 18.4
Other current liabilities	3.5	3.5
Other non-current liabilities	12.9	14.9
Operating lease, liability	$ 16.4	$ 18.4
Weighted Average Remaining Lease Term (Years)	3 years 7 months	3 years 8 months
Weighted Average Discount Rate	4.46%	4.46%

Leases - Operating lease liabil

Leases - Operating lease liability maturity (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
2019 (excluding the first quarter of 2019)	$ 2.1
2020	3.9
2021	3.1
2022	2.1
2023	1.5
2024	1.2
Thereafter	9.7
Total lease payments	23.6
Less imputed interest	(7.2)
Total	$ 16.4	$ 18.4

Commitments and Contingencies (

Commitments and Contingencies (Details) £ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2019GBP (£)	Jul. 01, 2018USD ($)	Jun. 30, 2019GBP (£)	Dec. 31, 2018USD ($)
Loss Contingencies [Line Items]
Amount drawn/utilized	$ 16,900,000
Committed Banking Facilities
Loss Contingencies [Line Items]
Debt maximum borrowing capacity	150,000,000	$ 150,000,000				$ 150,000,000
Amount drawn/utilized		0		$ 0
Other - Bank overdraft
Loss Contingencies [Line Items]
Amount drawn/utilized		7,200,000		3,500,000
Bonding Facility For Bank Guarantees
Loss Contingencies [Line Items]
Debt maximum borrowing capacity	3,800,000	3,800,000			£ 3
Amount drawn/utilized		1,400,000	£ 1
Letter of Credit
Loss Contingencies [Line Items]
Debt maximum borrowing capacity	$ 8,900,000	8,900,000			£ 7
Amount drawn/utilized		$ 0		$ 0

Subsequent Events (Details)

Subsequent Events (Details) $ in Millions	1 Months Ended
	Jul. 31, 2019USD ($)
Subsequent Event
Subsequent Event [Line Items]
Environmental remediation estimated costs	$ 2.6