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Earnings Per Common Share
12 Months Ended
Dec. 31, 2022
Earnings Per Share [Abstract]  
Earnings Per Common Share Earnings Per Common Share
($ in millions, except per share amounts)202220212020
Earnings per common share (attributable to PPG)
Income from continuing operations, net of tax$1,028 $1,420 $1,056 
(Loss)/income from discontinued operations, net of tax(2)19 
Net income (attributable to PPG)$1,026 $1,439 $1,059 
Weighted average common shares outstanding236.1 237.6 236.8 
Effect of dilutive securities:   
Stock options0.5 1.0 0.4 
Other stock compensation plans0.7 0.8 0.7 
Potentially dilutive common shares1.2 1.8 1.1 
Adjusted weighted average common shares outstanding237.3 239.4 237.9 
Earnings per common share (attributable to PPG)
Income from continuing operations, net of tax$4.35 $5.98 $4.46 
(Loss)/income from discontinued operations, net of tax(0.01)0.08 0.01 
Net income (attributable to PPG)$4.34 $6.06 $4.47 
Earnings per common share - assuming dilution (attributable to PPG)
Income from continuing operations, net of tax$4.33 $5.93 $4.44 
(Loss)/income from discontinued operations, net of tax(0.01)0.08 0.01 
Net income (attributable to PPG)$4.32 $6.01 $4.45 
Excluded from the computation of earnings per diluted share due to their antidilutive effect were 0.9 million, zero, and 1.4 million outstanding stock options in 2022, 2021 and 2020, respectively.