Basis of Presentation and Responsibility for interim Financial Statements	3 Months Ended
	Mar. 28, 2021
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 consolidated condensed 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. 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, 2020. 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 First Quarter, 2021, ended March 28, 2021, and the First Quarter, 2020, ended March 29, 2020. Discontinued operations Certain amounts in prior-year financial statements were reclassified to conform to the current-year presentation primarily due to the classification of certain businesses as discontinued operations. Impact of COVID-19 on the Financial Statements In March 2020, the World Health Organization characterized the coronavirus ("COVID-19") a pandemic. The rapid spread of the pandemic and the continuously evolving responses to combat it have had an increasingly negative impact on the global economy. Luxfer’s 2020 results were significantly affected by the global macro environment resulting from the COVID-19 pandemic, including broad-based market weakness, which was especially evident in our general industrial and transportation end-markets, contributing to a full year decline of 18.0% and 14.7% respectively, in each of those markets. In the first quarter of 2021, with net sales down only 3.6% and adjusted EBITDA up 12% on the prior year quarter (which was largely unaffected by the pandemic), Luxfer continues to operate all of its facilities, following temporary closures at a small number of locations in the second and third quarters of 2020. Due to weaker demand resulting from uncertain economic conditions, potential supply constraints, and the impact of COVID-19, Luxfer also implemented additional cost saving programs in the second half of 2020, including headcount reductions. While Company performance is now much improved, as the situation continues to evolve, if warranted, the Company may again suspend or reduce operations at certain facilities. In view of the rapidly changing business environment, unprecedented market volatility and heightened degree of uncertainty resulting from COVID-19, we are currently unable to fully determine its future impact on our business. However, we continue to monitor the progression of the pandemic and its potential effect on our financial position, results of operations and cash flows. The Company recognized that the COVID-19 pandemic constituted a triggering event in accordance with Accounting Standards Codification, ("ASC"), 350 Intangibles - Goodwill and Other, during the first quarter of 2020 and therefore performed an impairment assessment of its goodwill and other intangible assets. Based on the forecast at that time, we did not identify any impairments, nor marginal outcomes. During 2020 and in the first quarter of 2021, quarterly re-forecasts were performed to assess the impact COVID-19 was having on our results and liquidity, and in the fourth quarter of 2020 we carried out our annual goodwill and other intangibles impairment test using cash flows from the annual and strategic plan budgeting exercise. Nothing during the 2020 / 2021 re-forecasts nor the 2021 budget process has changed our assessment of fair value, with no impairments nor marginal outcomes identified. Assumptions and judgments are required in calculating the fair value of the reporting units. In developing our discounted cash flow analysis, assumptions about future revenues and expenses, capital expenditures and changes in working capital are based on our annual operating plan and long-term business plan for each of our reporting units. These plans take into consideration numerous factors including historical experience, anticipated future economic conditions, changes in raw material prices and growth expectations for the industries and end markets we participate in. These assumptions and judgments may change as we learn more about the impact of the COVID-19 pandemic. In relation to liquidity, the Company has access to a revolving credit facility (see Note 9) and has performed stress testing on financial covenants using current forecast information and has not identified any liquidity concerns. Accounting standards issued but not yet effective None that will be material to the Company.