Earnings and Dividends per Share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings and Dividends Per Share [Abstract]

Schedule Of Net Income Attributable To Common Stockholders

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

	Year Ended December 31,
	2019			2018			2017
Net income attributable to Westlake Chemical Corporation	$	421		$	996		$	1,304
Less:
Net income attributable to participating securities	(2		)	(5		)	(7		)
Net income attributable to common shareholders	$	419		$	991		$	1,297

Reconciliation Of Denominator For Basic And Diluted Earnings (Loss) Per Share

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

	Year Ended December 31,
	2019		2018		2017
Weighted average common shares—basic	128,395,184		129,401,823		129,087,043
Plus incremental shares from:
Assumed exercise of options and vesting of performance stock units	362,109		583,930		452,970
Weighted average common shares—diluted	128,757,293		129,985,753		129,540,013
Earnings per common share attributable to Westlake Chemical Corporation:
Basic	$	3.26	$	7.66	$	10.05
Diluted	$	3.25	$	7.62	$	10.00

Dividends Per Share

Dividends per Share

Dividends per common share for the years ended December 31, 2019, 2018 and 2017 were as follows:

	Year Ended December 31,
	2019		2018		2017
Dividends per common share	$	1.0250	$	0.9200	$	0.8012