v3.26.1
Related-Party Transactions (Details) - EBP 384 - PPG Industries, Inc. common stock - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
Investment (in shares) 3,253,922 3,924,604
Investment acquired, cost $ 87  
Investment sold, selling price 175  
Dividend income on investment $ 9