Earnings Per Share

6 Months Ended

Mar. 31, 2016

11.Earnings Per Share

Basic earnings per share (EPS) excludes dilution and is computed by dividing net income available for common stockholders 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 stock equivalent shares for the period. The Company includes as potential common shares the weighted average dilutive effects of outstanding stock options and restricted stock units using the treasury stock method. For the three and six months ended March 31, 2016 and for the three months ended March 31, 2015, options excluded from the calculation of potential common shares were not significant. The computation of diluted loss per share for the six months ended March 31, 2015 excludes 1.9 million of potential common shares due to their antidilutive effect.

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

	Three Months Ended		Six Months Ended
	March 31, 2016	March 31, 2015	March 31, 2016	March 31, 2015
	(in millions)
Denominator for basic earnings per share	154.3	151.1	154.0	146.5
Potential common shares	1.1	1.7	1.1	—

Denominator for diluted earnings per share	155.4	152.8	155.1	146.5