Net Earnings Per Share

3 Months Ended

Mar. 31, 2021

Net earnings per share were computed as follows:


	Three months ended March 31,
		2021		2020
		(in millions, except per share amounts)
Net earnings attributable to common stockholders		$	151	$	68
Basic earnings per common share:
Weighted-average common shares outstanding		214.9		216.0
Net earnings attributable to common stockholders		$	0.70	$	0.31
Diluted earnings per common share:
Weighted-average common shares outstanding		214.9		216.0
Dilutive common shares—stock-based awards		1.1		0.6
Diluted weighted-average shares outstanding		216.0		216.6
Net earnings attributable to common stockholders		$	0.70	$	0.31

Diluted earnings per share is calculated using weighted-average common shares outstanding, including the dilutive effect of stock-based awards as determined under the treasury stock method. In the computation of diluted earnings per common share, potentially dilutive stock-based awards are excluded if the effect of their inclusion is anti-dilutive. Shares for anti-dilutive stock-based awards not included in the computation of diluted earnings per common share were 1.2 million and 2.1 million in the three months ended March 31, 2021 and 2020, respectively.