v3.23.1
Cover
3 Months Ended
Mar. 31, 2023
shares
Entity Information [Line Items]  
Document Type 10-Q
Document Quarterly Report true
Document Period End Date Mar. 31, 2023
Document Transition Report false
Entity File Number 1-1687
Entity Registrant Name PPG INDUSTRIES INC
Entity Tax Identification Number 25-0730780
Entity Incorporation, State or Country Code PA
Entity Address, Address Line One One PPG Place
Entity Address, City or Town Pittsburgh
Entity Address, State or Province PA
Entity Address, Postal Zip Code 15272
City Area Code 412
Local Phone Number 434-3131
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Large Accelerated Filer
Entity Small Business false
Entity Emerging Growth Company false
Entity Shell Company false
Entity Common Stock, Shares Outstanding 235,416,045
Amendment Flag false
Document Fiscal Year Focus 2023
Document Fiscal Period Focus Q1
Entity Central Index Key 0000079879
Current Fiscal Year End Date --12-31
Common Stock  
Entity Information [Line Items]  
Title of 12(b) Security Common Stock, par value $1.66 2/3
Trading Symbol PPG
Security Exchange Name NYSE
0.875% Notes Due 2025  
Entity Information [Line Items]  
Title of 12(b) Security 0.875% Notes due 2025
Trading Symbol PPG 25
Security Exchange Name NYSE
1.875% Notes Due 2025  
Entity Information [Line Items]  
Title of 12(b) Security 1.875% Notes due 2025
Trading Symbol PPG 25A
Security Exchange Name NYSE
1.400% Notes Due 2027  
Entity Information [Line Items]  
Title of 12(b) Security 1.400% Notes due 2027
Trading Symbol PPG 27
Security Exchange Name NYSE
2.750% Notes Due 2029  
Entity Information [Line Items]  
Title of 12(b) Security 2.750% Notes due 2029
Trading Symbol PPG 29A
Security Exchange Name NYSE