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Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]      
Schedule II - Valuation and Qualifying Accounts
Schedule II – Valuation and Qualifying Accounts
Allowance for Doubtful Accounts for the Years Ended December 31, 2024, 2023, and 2022
($ in millions)Balance at Beginning of YearCharged to Costs and Expenses(1)Deductions(1, 2)Balance at End of Year
2024$23 $17 ($17)$23 
2023$29 $15 ($21)$23 
2022$29 $51 ($51)$29 
(1)In the first quarter 2022, PPG recorded a bad debt reserve of $43 million associated with the adverse economic impacts of the Russian invasion of Ukraine. Subsequently, the Company released a portion of this previously established bad debt reserve due to the collection of certain trade receivables.
(2)Notes and accounts receivable written off as uncollectible, net of recoveries, amounts attributable to divestitures and changes attributable to foreign currency translation.
    
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Year $ 240    
Balance at End of Year 327 $ 240  
SEC Schedule, 12-09, Allowance, Credit Loss [Member]      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Year 23 29 $ 29
Charged to Costs and Expenses 17 15 51
Deductions (17) (21) (51)
Balance at End of Year $ 23 $ 23 $ 29