Earnings Per Common Share

3 Months Ended

Mar. 31, 2016

Earnings Per Share

Historical per share and share data (except for shares on the balance sheet) give retroactive effect to the 2-for-1 stock split discussed in Note 1, "Basis of Presentation."

The effect of dilutive securities on the weighted average common shares outstanding included in the calculation of earnings per diluted common share for the three months ended March 31, 2016 and 2015 were as follows:



	Three Months Ended March 31
(number of shares in millions)	2016	2015
Weighted average common shares outstanding	267.6	273.2
Effect of dilutive securities:
Stock options	0.9	1.2
Other stock compensation plans	0.9	1.2
Potentially dilutive common shares	1.8	2.4
Adjusted weighted average common shares outstanding	269.4	275.6

Excluded from the computation of earnings per diluted share due to their antidilutive effect were 0.6 million outstanding stock options for the three months ended March 31, 2016. There were no antidilutive outstanding stock options for the three months ended March 31, 2015.