Earnings Per Share

3 Months Ended

Mar. 31, 2022

8. Earnings Per Share

The following table sets forth the computation of basic and diluted net earnings per share (in millions, except per share data):

	Three-month period ended
	March 31,
	2022		2021
Net earnings attributable to controlling interests	$	438.7	$	382.1
Weighted average number of common shares outstanding		209.0		194.6
Dilutive effect of stock options using the treasury stock method		4.5		4.5
Weighted average number of common and common equivalent shares outstanding		213.5		199.1
Basic net earnings per share	$	2.10	$	1.96
Diluted net earnings per share	$	2.05	$	1.92

Anti-dilutive stock-based awards of 1.0 million and 0.4 million shares were outstanding at three-month periods ended March 31, 2022 and 2021, respectively, that were excluded in the computation of the dilutive effect of stock-based awards for the three-month periods then ended. These stock‑based awards were excluded from the computation because the exercise prices on these stock-based awards were greater than the average market price of our common shares during the respective period, and therefore, would be anti‑dilutive to earnings per share under the treasury stock method.