Earnings per share

12 Months Ended

Dec. 31, 2021

21. Earnings Per Share

The computation of basic and diluted EPS under the two-class method were as follows (dollars and shares in millions):


	2021		2020		2019
Numerator: 1)
Net income attributable to common shareholders	$	435	$	187	$	462
Denominator: 1)
Basic weighted average common stock		87.5		87.3		87.2
Added: Weighted average stock options/share awards		0.2		0.2		0.2
Diluted weighted average common stock		87.7		87.5		87.4

Basic EPS	$	4.97	$	2.14	$	5.29
Diluted EPS	$	4.96	$	2.14	$	5.29

1) The Company’s unvested RSUs and PSs, of which some included the right to receive non-forfeitable dividend equivalents, are considered participating securities. Calculations of EPS under the two-class method exclude from the numerator any dividends paid or owed on participating securities and any undistributed earnings considered to be attributable to participating securities. The related participating securities are similarly excluded from the denominator. However, these participating securities have been immaterial for all the years presented.

Anti-dilutive shares outstanding for the years ended December 31, 2021, 2020 and 2019 were immaterial.