Summary of Significant Accounting Policies and Related Matters	12 Months Ended
Dec. 31, 2025
EBP 384
EBP, Accounting Standard Update and Change in Accounting Principle [Line Items]
Summary of Significant Accounting Policies and Related Matters	Summary of Significant Accounting Policies and Related Matters Basis of Accounting - The financial statements of the Plan are prepared on the accrual basis of accounting, except for amounts due to participants who had requested withdrawals, which are not recorded as a liability of the Plan as of December 31, 2025 and 2024 and are recorded upon distribution, in accordance with the American Institute of Certified Public Accountants Audit and Accounting Guide, Audits of Employee Benefit Plans. Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded on the accrual basis. Dividends on PPG Industries, Inc. common stock are recorded as investment income on the ex-dividend date. Use of Estimates - The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP) requires Plan management to make estimates and assumptions that affect the reported amounts of assets and liabilities and changes therein. Actual results could differ from those estimates. Benefit Payments - Benefits are recorded when paid. Risk and Uncertainties - The Plan invests in various investment securities. Investment securities, in general, are exposed to various risks, such as interest rate risk, credit risk, and overall market volatility. Due to the level of risk associated with certain investment securities, it is reasonably possible that changes in the values of investment securities will occur in the near term and that such changes could be material in relation to the amounts reported in the financial statements. Investment Valuation - Investments are generally stated at fair value. Investments in securities traded on securities exchanges are valued at the closing sales price on the last business day of the Plan year. Listed securities for which no sale was reported on that date are valued at bid quotations. The Plan presents in the Statement of Changes in Net Assets Available for Benefits the net appreciation/depreciation in the fair value of its investments which consists of the realized gains or losses and the unrealized appreciation/depreciation on those investments. See Note 3 for further information regarding fair value measurement. The Stable Value Fund is a separate account with FMTC as the investment manager which invests in a diversified portfolio of fixed income securities, such as U.S. government obligations, mortgage-related and asset-backed securities, and corporate bonds. The Stable Value Fund is measured at contract value. See Note 4 for further information regarding the Stable Value Fund. Notes Receivable from Participants - Notes receivable from participants are measured at their unpaid principal balance plus any accrued but unpaid interest. Delinquent participant loans are recorded as withdrawals based on the terms of the Plan document.

Summary of Significant Accounting Policies and Related Matters

12 Months Ended

Dec. 31, 2025

EBP, Accounting Standard Update and Change in Accounting Principle [Line Items]

Summary of Significant Accounting Policies and Related Matters

Basis of Accounting - The financial statements of the Plan are prepared on the accrual basis of accounting, except for amounts due to participants who had requested withdrawals, which are not recorded as a liability of the Plan as of December 31, 2025 and 2024 and are recorded upon distribution, in accordance with the American Institute of Certified Public Accountants Audit and Accounting Guide, Audits of Employee Benefit Plans.

Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded on the accrual basis. Dividends on PPG Industries, Inc. common stock are recorded as investment income on the ex-dividend date.

Use of Estimates - The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP) requires Plan management to make estimates and assumptions that affect the reported amounts of assets and liabilities and changes therein. Actual results could differ from those estimates.

Benefit Payments - Benefits are recorded when paid.

Risk and Uncertainties - The Plan invests in various investment securities. Investment securities, in general, are exposed to various risks, such as interest rate risk, credit risk, and overall market volatility. Due to the level of risk associated with certain investment securities, it is reasonably possible that changes in the values of investment securities will occur in the near term and that such changes could be material in relation to the amounts reported in the financial statements.

Investment Valuation - Investments are generally stated at fair value. Investments in securities traded on securities exchanges are valued at the closing sales price on the last business day of the Plan year. Listed securities for which no sale was reported on that date are valued at bid quotations. The Plan presents in the Statement of Changes in Net Assets Available for Benefits the net appreciation/depreciation in the fair value of its investments which consists of the realized gains or losses and the unrealized appreciation/depreciation on those investments. See Note 3 for further information regarding fair value measurement.

The Stable Value Fund is a separate account with FMTC as the investment manager which invests in a diversified portfolio of fixed income securities, such as U.S. government obligations, mortgage-related and asset-backed securities, and corporate bonds. The Stable Value Fund is measured at contract value. See Note 4 for further information regarding the Stable Value Fund.

Notes Receivable from Participants - Notes receivable from participants are measured at their unpaid principal balance plus any accrued but unpaid interest. Delinquent participant loans are recorded as withdrawals based on the terms of the Plan document.