Note 1 - Summary of Significant Accounting Policies	9 Months Ended
Sep. 30, 2023
Notes to Financial Statements
Significant Accounting Policies [Text Block]	1. Summary of Significant Accounting Policies *Basis of Presentation and Principles of Consolidation* In these notes, the terms “Corning,” “Company,” “we,” “us,” or “our” mean Corning Incorporated and its subsidiary companies. The consolidated financial statements include the consolidated accounts of Corning Incorporated and its subsidiaries consolidated in conformity with accounting principles generally accepted in the United States of America (“GAAP”). In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments, which include normal recurring adjustments, necessary to state fairly the financial position, results of operations and cash flows for the periods presented. All intercompany accounts, transactions and profits have been eliminated. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been omitted pursuant to the rules and regulations of the United States Securities and Exchange Commission (“SEC”). These consolidated financial statements should be read in conjunction with the audited financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022 (“2022 Form 10-K”). The results of operations for the interim periods are not necessarily indicative of results which may be expected for any other interim period or for the full year. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses and the disclosure of contingent assets and liabilities in the consolidated financial statements and related notes. Significant estimates and assumptions in these consolidated financial statements require the exercise of judgment. Due to the inherent uncertainty involved in making estimates, actual results reported in future periods may be different from these estimates. The non-controlling interest as recorded in the consolidated financial statements represents amounts attributable to the minority shareholders of Hemlock Semiconductor Group (“Hemlock”) and other less-than-wholly-owned consolidated subsidiaries. Certain prior year amounts have been reclassified to conform to the current year presentation. These reclassifications had no material impact on the results of operations, financial position or changes in shareholders’ equity.

Note 1 - Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2023

Significant Accounting Policies [Text Block]

1. Summary of Significant Accounting Policies

Basis of Presentation and Principles of Consolidation

In these notes, the terms “Corning,” “Company,” “we,” “us,” or “our” mean Corning Incorporated and its subsidiary companies.

The consolidated financial statements include the consolidated accounts of Corning Incorporated and its subsidiaries consolidated in conformity with accounting principles generally accepted in the United States of America (“GAAP”). In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments, which include normal recurring adjustments, necessary to state fairly the financial position, results of operations and cash flows for the periods presented. All intercompany accounts, transactions and profits have been eliminated. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been omitted pursuant to the rules and regulations of the United States Securities and Exchange Commission (“SEC”). These consolidated financial statements should be read in conjunction with the audited financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022 (“2022 Form 10-K”). The results of operations for the interim periods are not necessarily indicative of results which may be expected for any other interim period or for the full year.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses and the disclosure of contingent assets and liabilities in the consolidated financial statements and related notes. Significant estimates and assumptions in these consolidated financial statements require the exercise of judgment. Due to the inherent uncertainty involved in making estimates, actual results reported in future periods may be different from these estimates.

The non-controlling interest as recorded in the consolidated financial statements represents amounts attributable to the minority shareholders of Hemlock Semiconductor Group (“Hemlock”) and other less-than-wholly-owned consolidated subsidiaries.

Certain prior year amounts have been reclassified to conform to the current year presentation. These reclassifications had no material impact on the results of operations, financial position or changes in shareholders’ equity.