BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES	6 Months Ended
Jun. 30, 2025
Accounting Policies [Abstract]
BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES	BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES Basis of preparation: These unaudited interim condensed consolidated financial statements for the period ended June 30, 2025 (Q2 2025 Interim Financial Statements) have been prepared in accordance with generally accepted accounting principles in the United States (GAAP) for interim financial reporting, and the instructions to Form 10-Q and Article 10 of Regulation S-X. Certain information or footnote disclosures, normally included in annual financial statements prepared in accordance with GAAP, have been condensed or omitted pursuant to the rules and regulations of the U.S. Securities and Exchange Commission for interim financial reporting. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. The Q2 2025 Interim Financial Statements, in the opinion of management, reflect all normal and recurring adjustments necessary to present fairly our financial position, operating results and cash flows for the periods presented. Results for interim periods are not necessarily an indication of results to be expected for the year. The three and six months ended June 30, 2025 are referred to herein as Q2 2025 and 1H 2025, respectively. The Q2 2025 Interim Financial Statements should be read in conjunction with our 2024 annual consolidated financial statements and related notes (2024 AFS) which are included in our Annual Report on Form 10-K for the year ended December 31, 2024. The Q2 2025 Interim Financial Statements are presented in United States (U.S.) dollars, which is also Celestica's functional currency. Unless otherwise noted, all financial information is presented in millions of U.S. dollars (except percentages and per share/per unit amounts). We have reclassified certain prior period information to conform with the presentation of the current period. Basis of consolidation: These consolidated financial statements include our subsidiaries, all of which are wholly owned. Any subsidiaries that are formed or acquired during the year are consolidated from their respective dates of formation or acquisition. Inter-company transactions and balances are eliminated on consolidation. Use of estimates and judgments: The preparation of financial statements requires management to make judgments, estimates and assumptions that affect the application of accounting policies, the reported amounts of assets, liabilities, revenue and expenses, and related disclosures with respect to contingent assets and liabilities. We base our judgments, estimates and assumptions on current facts, historical experience and various other factors that we believe are reasonable under the circumstances. The economic environment also impacts certain estimates and discount rates necessary to prepare our consolidated financial statements, including significant estimates and discount rates applicable to the determination of the fair values used in the impairment testing of our non-financial assets. Our assessment of these factors forms the basis for our judgments on the carrying values of our assets and liabilities, and the accrual of our costs and expenses. Actual results could differ materially from our estimates and assumptions. We review our estimates and underlying assumptions on an ongoing basis and make revisions as determined necessary by management. Revisions are recognized in the period in which the estimates are revised and may also impact future periods. Our review of the estimates, judgments and assumptions used in the preparation of the Q2 2025 Interim Financial Statements included those relating to, among others: our determination of the timing of revenue recognition, the determination of whether indicators of impairment existed for our assets and reporting units, our measurement of deferred tax assets and liabilities, our estimated inventory write-downs and expected credit losses, customer creditworthiness, and the determination of the fair value of assets acquired, liabilities assumed and contingent consideration in connection with a business combination. Any revisions to estimates, judgments or assumptions may result in, among other things, write-downs, accelerated depreciation or amortization, or impairments of our assets or our reporting units, any of which could have a material impact on our financial performance and financial condition. Due to global economic conditions, including the impact of ongoing trade conflicts, tariffs and geopolitical conflicts, there has been and will continue to be uncertainty in the global economy. Management has made estimates and assumptions based on information available as of the date of issuance of the Q2 2025 Interim Financial Statements taking into consideration certain possible impacts due to the foregoing factors. These estimates may change, as new events occur, and additional information is obtained. Significant accounting policies: The Q2 2025 Interim Financial Statements have been prepared on a basis consistent with the accounting policies as described in note 2 to our 2024 AFS. Recently adopted accounting pronouncements: In December 2023, the Financial Accounting Standards Board (FASB) issued ASU 2023-09 Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which enhances income tax disclosures, primarily through changes to the rate reconciliation and disaggregation of income taxes paid. The impact of our adoption of such guidance will be reflected in our 2025 annual consolidated financial statements. Recently issued accounting pronouncements not yet adopted: In October 2023, the FASB issued ASU 2023-06 Disclosure Improvements — Codification Amendments in Response to the U.S. Securities and Exchange Commission’s Disclosure Update and Simplification Initiative, which amends disclosure guidance over an entity’s accounting policy related to derivative instruments, material prior period adjustments upon a change in a reporting entity, earnings-per-share, encumbered assets, unused lines of credit and unfunded commitments, and liquidation preferences of preferred stock. The amendments are effective prospectively on the date each individual amendment is effectively removed from Regulation S-X or Regulation S-K. In November 2024, the FASB issued ASU 2024-03 Income Statement — Reporting Comprehensive Income — Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, which requires public business entities to disclose disaggregated information about certain costs and expenses in the notes to their financial statements. The objective of this update is to provide more detailed information about the types of expenses included in commonly presented expense captions, such as cost of sales, selling, general and administrative expenses (SG&A), and research and development expenses. The update mandates that entities present a tabular disclosure of each relevant expense caption on the face of the income statement, disaggregated into specified categories, including purchases of inventory, employee compensation, depreciation, intangible asset amortization, and other significant expenses. This enhanced disclosure aims to improve the transparency and decision-usefulness of financial statements for investors and other users. ASU 2024-03 is effective for annual periods beginning after December 15, 2026, with early adoption permitted. We are currently evaluating the impact that the updated standards will have on our financial statement disclosures. We believe that other recently issued accounting standards will either not have a material impact on the consolidated financial statements or will not apply to our operations.

These unaudited interim condensed consolidated financial statements for the period ended June 30, 2025 (Q2 2025 Interim Financial Statements) have been prepared in accordance with generally accepted accounting principles in the United States (GAAP) for interim financial reporting, and the instructions to Form 10-Q and Article 10 of Regulation S-X. Certain information or footnote disclosures, normally included in annual financial statements prepared in accordance with GAAP, have been condensed or omitted pursuant to the rules and regulations of the U.S. Securities and Exchange Commission for interim financial reporting. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. The Q2 2025 Interim Financial Statements, in the opinion of management, reflect all normal and recurring adjustments necessary to present fairly our financial position, operating results and cash flows for the periods presented. Results for interim periods are not necessarily an indication of results to be expected for the year. The three and six months ended June 30, 2025 are referred to herein as Q2 2025 and 1H 2025, respectively. The Q2 2025 Interim Financial Statements should be read in conjunction with our 2024 annual consolidated financial statements and related notes (2024 AFS) which are included in our Annual Report on Form 10-K for the year ended December 31, 2024. The Q2 2025 Interim Financial Statements are presented in United States (U.S.) dollars, which is also Celestica's functional currency. Unless otherwise noted, all financial information is presented in millions of U.S. dollars (except percentages and per share/per unit amounts). We have reclassified certain prior period information to conform with the presentation of the current period.

The preparation of financial statements requires management to make judgments, estimates and assumptions that affect the application of accounting policies, the reported amounts of assets, liabilities, revenue and expenses, and related disclosures with respect to contingent assets and liabilities. We base our judgments, estimates and assumptions on current facts, historical experience and various other factors that we believe are reasonable under the circumstances. The economic environment also impacts certain estimates and discount rates necessary to prepare our consolidated financial statements, including significant estimates and discount rates applicable to the determination of the fair values used in the impairment testing of our non-financial assets. Our assessment of these factors forms the basis for our judgments on the carrying values of our assets and liabilities, and the accrual of our costs and expenses. Actual results could differ materially from our estimates and assumptions. We review our estimates and underlying assumptions on an ongoing basis and make revisions as determined necessary by management. Revisions are recognized in the period in which the estimates are revised and may also impact future periods.

Our review of the estimates, judgments and assumptions used in the preparation of the Q2 2025 Interim Financial Statements included those relating to, among others: our determination of the timing of revenue recognition, the determination of whether indicators of impairment existed for our assets and reporting units, our measurement of deferred tax assets and liabilities, our estimated inventory write-downs and expected credit losses, customer creditworthiness, and the determination of the fair value of assets acquired, liabilities assumed and contingent consideration in connection with a business combination. Any revisions to estimates, judgments or assumptions may result in, among other things, write-downs, accelerated depreciation or amortization,

Due to global economic conditions, including the impact of ongoing trade conflicts, tariffs and geopolitical conflicts, there has been and will continue to be uncertainty in the global economy. Management has made estimates and assumptions based on information available as of the date of issuance of the Q2 2025 Interim Financial Statements taking into consideration certain possible impacts due to the foregoing factors. These estimates may change, as new events occur, and additional information is obtained.

In December 2023, the Financial Accounting Standards Board (FASB) issued ASU 2023-09 Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which enhances income tax disclosures, primarily through changes to the rate reconciliation and disaggregation of income taxes paid. The impact of our adoption of such guidance will be reflected in our 2025 annual consolidated financial statements.

In October 2023, the FASB issued ASU 2023-06 Disclosure Improvements — Codification Amendments in Response to the U.S. Securities and Exchange Commission’s Disclosure Update and Simplification Initiative, which amends disclosure guidance over an entity’s accounting policy related to derivative instruments, material prior period adjustments upon a change in a reporting entity, earnings-per-share, encumbered assets, unused lines of credit and unfunded commitments, and liquidation preferences of preferred stock. The amendments are effective prospectively on the date each individual amendment is effectively removed from Regulation S-X or Regulation S-K.

In November 2024, the FASB issued ASU 2024-03 Income Statement — Reporting Comprehensive Income — Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, which requires public business entities to disclose disaggregated information about certain costs and expenses in the notes to their financial statements. The objective of this update is to provide more detailed information about the types of expenses included in commonly presented expense captions, such as cost of sales, selling, general and administrative expenses (SG&A), and research and development expenses. The update mandates that entities present a tabular disclosure of each relevant expense caption on the face of the income statement, disaggregated into specified categories, including purchases of inventory, employee compensation, depreciation, intangible asset amortization, and other significant expenses. This enhanced disclosure aims to improve the transparency and decision-usefulness of financial statements for investors and other users. ASU 2024-03 is effective for annual periods beginning after December 15, 2026, with early adoption permitted.