Basis of Presentation and Responsibility for interim Financial Statements	9 Months Ended
	Sep. 26, 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 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 Third Quarter 2021, ended on September 26, 2021, and the Third Quarter 2020, ended on September 27, 2020. Discontinued operations Certain amounts in the prior-year financial statements were reclassified to conform to the current-year presentation 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 nine months of 2021, with net sales up 13.5%, a return to growth across all end-markets and adjusted EBITDA up 21.7% on the prior year, the Company has delivered three quarters of strong performance amid the global economic recovery from the COVID-19 pandemic. Furthermore, it continues to operate all of its facilities at near normal production levels, following temporary closures of a few locations in the second and third quarters of 2020. Due to weaker demand resulting from uncertain economic conditions, supply constraints, and the impact of COVID-19, Luxfer implemented additional cost saving programs in the second half of 2020, including headcount reductions. Company performance is now much improved and the apparent success of vaccine programs in the U.S. and Europe has given rise to fewer restrictions, increased stability and macroeconomic recovery. That said, the coronavirus is still prevalent in many of our markets, there are pressures on availability and therefore cost of, raw materials, transport, energy and labor, continuing restrictions on international travel resulting in considerable uncertainty as to when normal conditions will prevail. If warranted, it is possible that the Company may again suspend or reduce operations at certain facilities, which could have an adverse 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 nine months 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. 1. Basis of Presentation and Responsibility for interim Financial Statements (continued) There have been no subsequent triggering events that has changed our assessment of fair value, as a result, no impairments nor marginal outcomes have been 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. Furthermore, the Company has reported historically low levels of net debt and continual strong cash flow generation since the onset of the pandemic. Accounting standards issued but not yet effective None that will be material to the Company.