Earnings per Share

6 Months Ended

Jun. 30, 2018

The numerator for both basic and diluted earnings per share is Net income. The denominator for basic earnings per share is the weighted-average shares outstanding during the period.

A reconciliation of basic weighted-average shares outstanding to diluted weighted-average shares outstanding is as follows:



	Three Months Ended June 30,		Six Months Ended June 30,
(in millions)	2018	2017	2018	2017
Basic weighted-average shares outstanding	151.6	156.0	151.9	157.7
Effect of dilutive securities⁽¹⁾	2.3	3.0	2.5	3.2
Diluted weighted-average shares outstanding⁽²⁾	153.9	159.0	154.4	160.9


(1)	The dilutive effect of outstanding stock options, restricted stock units, restricted stock, performance share units and Coworker Stock Purchase Plan units is reflected in the diluted weighted-average shares outstanding using the treasury stock method.


(2)	There were fewer than 0.2 million potential common shares excluded from diluted weighted-average shares outstanding for both the three and six months ended June 30, 2018 and 2017 as their inclusion would have had an anti-dilutive effect.