Earnings and Dividends per Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Schedule Of Net Income Attributable To Common Stockholders

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

	Year Ended December 31,
	2018			2017			2016
Net income attributable to Westlake Chemical Corporation	$	996		$	1,304		$	399
Less:
Net income attributable to participating securities	(5		)	(7		)	(2		)
Net income attributable to common shareholders	$	991		$	1,297		$	397

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,
	2018		2017		2016
Weighted average common shares—basic	129,401,823		129,087,043		129,367,712
Plus incremental shares from:
Assumed exercise of options	583,930		452,970		607,110
Weighted average common shares—diluted	129,985,753		129,540,013		129,974,822
Earnings per common share attributable to Westlake Chemical Corporation:
Basic	$	7.66	$	10.05	$	3.07
Diluted	$	7.62	$	10.00	$	3.06

Dividends Per Share [Table Text Block]

Dividends per Share

Dividends per common share for the years ended December 31, 2018, 2017, and 2016 were as follows:

	Year Ended December 31,
	2018		2017		2016
Dividends per common share	$	0.9200	$	0.8012	$	0.7442