Final answer:
Diluted EPS is calculated by adjusting both the income and the weighted average number of shares outstanding for the effect of dilutive potential common shares. The authoritative guidance for calculating diluted earnings per share is found in the FASB Accounting Standards Codification under Topic 260.
Step-by-step explanation:
To calculate diluted earnings per share (EPS), Accounting Standards Codification (ASC) provides guidance under Topic 260, specifically the Earnings Per Share Subtopic.
According to ASC, diluted EPS is calculated by adjusting the income available to common shareholders and the weighted average number of shares outstanding, for the effects of all potential dilutive common shares that could be converted into common stock during the reporting period.
Potential common shares are included in the diluted EPS calculation when their effect is dilutive, meaning they would reduce EPS if converted.
To find the exact references in the ASC, one would search the database using the provided instructions and login details. The authoritative guidance is located in the ASC under Topic 260, which deals with Earnings Per Share.