Earnings Per Share

12 Months Ended

Dec. 31, 2020

The weighted average number of shares outstanding used to compute earnings per common share were as follows (in millions):


	2020	2019	2018
Weighted average common shares outstanding for basic computations	280.0	282.0	284.5
Weighted average dilutive effect of equity awards	1.2	1.8	2.3
Weighted average common shares outstanding for diluted computations	281.2	283.8	286.8

We compute basic and diluted earnings per common share by dividing net earnings by the respective weighted average number of common shares outstanding for the periods presented. Our calculation of diluted earnings per common share also includes the dilutive effects for the assumed vesting of outstanding restricted stock units (RSUs), performance stock units (PSUs) and exercise of outstanding stock options based on the treasury stock method. There were no significant anti-dilutive equity awards for the years ended December 31, 2020, 2019 and 2018.