Earnings Per Common Share (Tables)

6 Months Ended

Jun. 30, 2016

Earnings Per Share [Abstract]

Earnings Per Common Share Calculations

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 and six months ended June 30, 2016 and 2015 were as follows:

	Three Months Ended June 30		Six Months Ended June 30
(number of shares in millions)	2016	2015	2016	2015
Weighted average common shares outstanding	267.2	272.5	267.4	272.8
Effect of dilutive securities:
Stock options	0.9	1.1	0.9	1.1
Other stock compensation plans	1.0	1.1	0.9	1.2
Potentially dilutive common shares	1.9	2.2	1.8	2.3
Adjusted weighted average common shares outstanding	269.1	274.7	269.2	275.1