v3.23.1
Stock-Based Compensation (Additional Information) (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense $ 17 $ 6
Total income tax benefit recognized related to the stock-based compensation $ 4 $ 1
Stock options granted from the PPG Omnibus Plan 410,001 487,277
Stock options granted from the PPG Omnibus Plan, weighted average fair value per share (in usd per share) $ 38.55 $ 36.52
Maximum term of the outstanding stock options for the PPG Omnibus Plan and the PPG Stock Plan for certain employees 10 years  
Restricted Stock Units (RSUs) [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
RSUs granted 248,949 189,411
RSUs granted, weighted average fair value per share (in usd per share) $ 124.44 $ 143.92
Award vesting period (in years) 3 years  
Stock Compensation Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
RSUs granted 52,389 57,134
RSUs granted, weighted average fair value per share (in usd per share) $ 129.03 $ 151.87
Minimum | Restricted Stock Units (RSUs) [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share Based Compensation Arrangement By Share Based Payment Award Target Award 0.00%  
Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Options exercisable period 36 months  
Maximum | Restricted Stock Units (RSUs) [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share Based Compensation Arrangement By Share Based Payment Award Target Award 200.00%