Earnings Per Share (Notes)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Earnings per share

10. Earnings per Share 

The following is a reconciliation of the shares used to compute basic and diluted earnings per share (in millions):

	Three Months Ended
	March 31,
	2020	2019
Weighted average number of common shares outstanding used to compute basic earnings per share	52.8	52.6
Dilutive effect of stock-based awards	0.5	0.6
Number of shares used to compute diluted earnings per share	53.3	53.2

There were 0.3 million share equivalents outstanding during the three months ended March 31, 2020 and 2019 that were anti-dilutive when applying the treasury stock method and thus were excluded from the number of shares used to compute diluted earnings per share.