New Accounting Standards (Policies)	9 Months Ended
Sep. 30, 2026
Accounting Policies [Abstract]
New Accounting Standards	Recently Adopted Accounting Standards PPG did not adopt any new accounting standards during the nine months ended September 30, 2026. Recently Issued Accounting Standards In November 2024, the FASB issued ASU 2024-03, “Income Statement – Reporting Comprehensive Income-Expense Disaggregation (Subtopic 220-40): Disaggregation of Income Statement Expenses”. The ASU requires the disclosure of additional information related to certain costs and expenses, including amounts of inventory purchases, employee compensation, and depreciation and amortization included in each income statement line item. The ASU also requires disclosure of the total amount of selling expenses and our definition of selling expenses. This ASU will be effective for the annual period ending December 31, 2027. Adoption of this ASU will result in additional disclosure, but will not impact PPG’s consolidated financial position, results of operations or cash flows. In September 2025, the FASB issued ASU 2025-06, “Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software”. The ASU is intended to modernize the recognition and disclosure framework for internal-use software costs, removing the previous “development stage” model to align the accounting rules with how software is developed today. This ASU will be effective for PPG beginning January 1, 2028. The Company is currently evaluating the impact of this ASU on its consolidated financial statements. In May 2026, the FASB issued ASU 2026-02, "Environmental Credits and Environmental Credit Obligations (Topic 818)". The ASU improves the financial accounting for and disclosure of environmental credit obligations by creating a comprehensive framework to apply to transactions that generate, purchase, or receive environmental credits. This ASU will be effective for PPG beginning January 1, 2028. The Company is currently evaluating the impact of this ASU on its consolidated financial statements.

In November 2024, the FASB issued ASU 2024-03, “Income Statement – Reporting Comprehensive Income-Expense Disaggregation (Subtopic 220-40): Disaggregation of Income Statement Expenses”. The ASU requires the disclosure of additional information related to certain costs and expenses, including amounts of inventory purchases, employee compensation, and depreciation and amortization included in each income statement line item. The ASU also requires disclosure of the total amount of selling expenses and our definition of selling expenses. This ASU will be effective for the annual period ending December 31, 2027. Adoption of this ASU will result in additional disclosure, but will not impact PPG’s consolidated financial position, results of operations or cash flows.

In September 2025, the FASB issued ASU 2025-06, “Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software”. The ASU is intended to modernize the recognition and disclosure framework for internal-use software costs, removing the previous “development stage” model to align the accounting rules with how software is developed today. This ASU will be effective for PPG beginning January 1, 2028. The Company is currently evaluating the impact of this ASU on its consolidated financial statements.

In May 2026, the FASB issued ASU 2026-02, "Environmental Credits and Environmental Credit Obligations (Topic 818)". The ASU improves the financial accounting for and disclosure of environmental credit obligations by creating a comprehensive framework to apply to transactions that generate, purchase, or receive environmental credits. This ASU will be effective for PPG beginning January 1, 2028. The Company is currently evaluating the impact of this ASU on its consolidated financial statements.