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Earnings Per Share (Notes)

9 Months Ended

Sep. 30, 2019

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		Nine Months Ended
	September 30,		September 30,
	2019	2018	2019	2018
Weighted average number of common shares outstanding used to compute basic earnings per share	52.8	52.4	52.7	52.3
Dilutive effect of stock-based awards	0.6	0.6	0.7	0.7
Number of shares used to compute diluted earnings per share	53.4	53.0	53.4	53.0

During the nine months ended September 30, 2019, there were 0.2 million share equivalents outstanding that were excluded from the computation of diluted earnings per share because they were anti-dilutive when applying the treasury stock method. During the three months ended September 30, 2019 and the three and nine months ended September 30, 2018 the amount of anti-dilutive share equivalents outstanding were insignificant.