Earnings Per Common Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Earnings Per Common Share Calculations

($ in millions, except per share amounts)	2020	2019	2018
Earnings per common share (attributable to PPG)
Income from continuing operations, net of tax	$1,056	$1,243	$1,323
Income from discontinued operations, net of tax	3	—	18
Net income (attributable to PPG)	$1,059	$1,243	$1,341
Weighted average common shares outstanding	236.8	236.9	243.9
Effect of dilutive securities:
Stock options	0.4	0.6	0.8
Other stock compensation plans	0.7	0.7	0.7
Potentially dilutive common shares	1.1	1.3	1.5
Adjusted weighted average common shares outstanding	237.9	238.2	245.4
Earnings per common share (attributable to PPG):
Income from continuing operations, net of tax	$4.46	$5.25	$5.43
Income from discontinued operations, net of tax	0.01	—	0.07
Net income (attributable to PPG)	$4.47	$5.25	$5.50
Earnings per common share - assuming dilution (attributable to PPG)
Income from continuing operations, net of tax	$4.44	$5.22	$5.40
Income from discontinued operations, net of tax	0.01	—	0.07
Net income (attributable to PPG)	$4.45	$5.22	$5.47