Earnings per Share

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Earnings per Share

Earnings Per Share

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 March 31,
	2020	2019
Basic weighted-average shares outstanding	142.7	147.0
Effect of dilutive securities(1)	2.2	2.2
Diluted weighted-average shares outstanding(2)	144.9	149.2

(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 0.1 million potential common shares excluded from diluted weighted-average shares outstanding for both the three months ended March 31, 2020 and 2019 as their inclusion would have had an anti-dilutive effect.