EARNINGS PER SHARE

9 Months Ended

Sep. 30, 2021

The earnings per share amounts are the same for class A and class B common shares as the holders of each class are legally entitled to equal per share distributions whether through dividends or in liquidation.

The following table sets forth the computation of basic and diluted earnings per share for the three and nine months ended September 30, 2021 and 2020 (in millions, except per share amounts):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Numerator:
Net income attributable to common shareowners	$	2,329	$	1,957	$	9,797	$	4,690
Denominator:
Weighted average shares	870		864		869		861

Vested portion of restricted units	5		4		5		5
Denominator for basic earnings per share	875		868		874		866
Effect of dilutive securities:
Restricted units	3		4		3		4
Stock options	1		—		1		—
Denominator for diluted earnings per share	879		872		878		870
Basic earnings per share	$	2.66	$	2.25	$	11.21	$	5.42
Diluted earnings per share	$	2.65	$	2.24	$	11.16	$	5.39

There were no antidilutive shares for the three months ended September 30, 2021 and 2020. Diluted earnings per share for the nine months ended September 30, 2021 and 2020 excluded the effect of 0.1 and 0.8 million shares of common stock, respectively, that may be issued upon the exercise of employee stock options because such effect would have been antidilutive.