Earnings Per Common Share (Tables)

6 Months Ended

Jun. 30, 2015

Earnings Per Share [Abstract]

Earnings Per Common Share Calculations

The following table presents the effect of dilutive securities on the weighted average common shares outstanding included in the calculation of earnings per common share for the three and six months ended June 30, 2015 and 2014:

	Three Months Ended June 30		Six Months Ended June 30
(number of shares in millions)	2015	2014	2015	2014
Weighted average common shares outstanding	272.5	277.2	272.8	277.8
Effect of dilutive securities:
Stock options	1.1	1.4	1.1	1.4
Other stock compensation plans	1.1	1.6	1.2	1.6
Potentially dilutive common shares	2.2	3.0	2.3	3.0
Adjusted weighted average common shares outstanding	274.7	280.2	275.1	280.8