Earnings and Dividends per Share (Tables)

9 Months Ended

Sep. 30, 2021

Earnings and Dividends Per Share [Abstract]

Schedule Of Net Income Attributable To Common Stockholders

Diluted earnings per share include the effects of certain stock options and performance stock units.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Net income attributable to Westlake Chemical Corporation	$	607	$	57	$	1,371	$	217
Less:
Net income attributable to participating securities	(3)		—		(7)		(1)
Net income attributable to common shareholders	$	604	$	57	$	1,364	$	216

Reconciliation Of Denominator For Basic And Diluted Earnings Per Share

The following table reconciles the denominator for the basic and diluted earnings per share computations shown in the consolidated statements of operations:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Weighted average common shares—basic	128,060,193		127,701,340		128,053,337		127,872,434
Plus incremental shares from:
Assumed exercise of options and vesting of performance stock units	705,621		252,567		656,760		200,632
Weighted average common shares—diluted	128,765,814		127,953,907		128,710,097		128,073,066
Earnings per common share attributable to Westlake Chemical Corporation:
Basic	$	4.71	$	0.45	$	10.65	$	1.69
Diluted	$	4.69	$	0.45	$	10.60	$	1.69

Dividends Per Share

Dividends per Share

Dividends per common share for the three and nine months ended September 30, 2021 and 2020 were as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Dividends per common share	$	0.2975	$	0.2700	$	0.8375	$	0.7950