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Earnings Per Share
 9 Months Ended
Jun. 30, 2021
Earnings Per Share  
Earnings Per Share

11.   Earnings Per Share

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Basic earnings per share (EPS) excludes dilution and is computed by dividing net income attributable to AECOM by the weighted average number of common shares outstanding for the period. Diluted EPS is computed by dividing net income attributable to AECOM by the weighted average number of common shares outstanding and potential common shares for the period. The Company includes as potential common shares the weighted average dilutive effects of equity awards using the treasury stock method. For the three and nine months ended June 30, 2021 and 2020, equity awards excluded from the calculation of potential common shares were not significant.

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The following table sets forth a reconciliation of the denominators for basic and diluted earnings per share:

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Three Months Ended

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Nine Months Ended

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June 30,

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June 30,

    

June 30,

    

June 30,

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2021

    

2020

    

2021

    

2020

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(in millions)

Denominator for basic earnings per share

 

146.1

 

160.1

 

148.4

 

158.7

Potential common shares

 

2.8

 

1.7

 

2.3

 

2.4

Denominator for diluted earnings per share

 

148.9

 

161.8

 

150.7

 

161.1

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