Guarantor Disclosures (Tables)

12 Months Ended

Dec. 31, 2014

Guarantor Disclosures [Abstract]

Condensed Consolidating Financial Information Balance Sheet

Condensed Consolidating Financial Information as of December 31, 2014

	Westlake Chemical Corporation		100% Owned Guarantor Subsidiaries		OpCo (Less Than 100% Owned Guarantor Subsidiary)		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Balance Sheet
Current assets
Cash and cash equivalents	$	655,947	$	3,057	$	131,545	$	90,052	$	—		$	880,601
Accounts receivable, net	8,451		1,454,709		56,049		135,133		(1,093,676		)	560,666
Inventories	—		414,975		6,634		104,167		—			525,776
Prepaid expenses and other current assets	172		9,485		212		1,938		—			11,807
Deferred income taxes	409		29,832		—		2,196		—			32,437
Total current assets	664,979		1,912,058		194,440		333,486		(1,093,676		)	2,011,287
Property, plant and equipment, net	—		1,477,515		842,057		437,985		—			2,757,557
Equity investments	4,033,378		1,237,080		—		352,550		(5,561,703		)	61,305
Other assets, net	30,543		387,325		57,733		141,948		(233,708		)	383,841
Total assets	$	4,728,900	$	5,013,978	$	1,094,230	$	1,265,969	$	(6,889,087	)	$	5,213,990
Current liabilities
Accounts payable	$	1,055,527	$	160,834	$	17,680	$	95,856	$	(1,068,835	)	$	261,062
Accrued liabilities	8,754		203,608		11,225		77,372		(24,841		)	276,118
Total current liabilities	1,064,281		364,442		28,905		173,228		(1,093,676		)	537,180
Long-term debt	753,108		10,889		227,638		—		(227,638		)	763,997
Deferred income taxes	—		497,919		1,848		42,369		(6,070		)	536,066
Other liabilities	—		43,452		—		131,407		—			174,859
Total liabilities	1,817,389		916,702		258,391		347,004		(1,327,384		)	2,012,102
Total Westlake Chemical Corporation stockholders' equity	2,911,511		4,097,276		835,839		628,588		(5,561,703		)	2,911,511
Noncontrolling interests	—		—		—		290,377		—			290,377
Total equity	2,911,511		4,097,276		835,839		918,965		(5,561,703		)	3,201,888
Total liabilities and equity	$	4,728,900	$	5,013,978	$	1,094,230	$	1,265,969	$	(6,889,087	)	$	5,213,990

Condensed Consolidating Financial Information as of December 31, 2013

	Westlake Chemical Corporation		100% Owned Guarantor Subsidiaries		OpCo (Less Than 100% Owned Guarantor Subsidiary)		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Balance Sheet
Current assets
Cash and cash equivalents	$	420,948	$	6,227	$	—	$	34,126	$	—		$	461,301
Marketable securities	239,388		—		—		—		—			239,388
Accounts receivable, net	3,879		666,344		71,812		2,755		(316,333		)	428,457
Inventories	—		339,929		116,377		15,573		—			471,879
Prepaid expenses and other current assets	778		11,055		257		1,798		—			13,888
Deferred income taxes	441		28,974		4,448		306		—			34,169
Total current assets	665,434		1,052,529		192,894		54,558		(316,333		)	1,649,082
Property, plant and equipment, net	—		1,318,119		762,972		6,923		—			2,088,014
Equity investments	2,815,752		636,461		10,411		31,518		(3,427,267		)	66,875
Other assets, net	15,393		423,901		75,197		1,199		(258,752		)	256,938
Total assets	$	3,496,579	$	3,431,010	$	1,041,474	$	94,198	$	(4,002,352	)	$	4,060,909
Current liabilities
Accounts payable	$	316,652	$	100,570	$	122,564	$	10,649	$	(300,822	)	$	249,613
Accrued liabilities	8,334		134,452		26,688		1,282		(15,511		)	155,245
Total current liabilities	324,986		235,022		149,252		11,931		(316,333		)	404,858
Long-term debt	752,990		10,889		252,973		—		(252,973		)	763,879
Deferred income taxes	—		260,171		182,855		729		(5,779		)	437,976
Other liabilities	—		34,571		962		60		—			35,593
Total equity	2,418,603		2,890,357		455,432		81,478		(3,427,267		)	2,418,603
Total liabilities and equity	$	3,496,579	$	3,431,010	$	1,041,474	$	94,198	$	(4,002,352	)	$	4,060,909

Schedule of Guarantor Obligations

ondensed Consolidating Financial Information as of December 31, 2014

	Westlake Chemical Corporation		100% Owned Guarantor Subsidiaries		OpCo (Less Than 100% Owned Guarantor Subsidiary)		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Balance Sheet
Current assets
Cash and cash equivalents	$	655,947	$	3,057	$	131,545	$	90,052	$	—		$	880,601
Accounts receivable, net	8,451		1,454,709		56,049		135,133		(1,093,676		)	560,666
Inventories	—		414,975		6,634		104,167		—			525,776
Prepaid expenses and other current assets	172		9,485		212		1,938		—			11,807
Deferred income taxes	409		29,832		—		2,196		—			32,437
Total current assets	664,979		1,912,058		194,440		333,486		(1,093,676		)	2,011,287
Property, plant and equipment, net	—		1,477,515		842,057		437,985		—			2,757,557
Equity investments	4,033,378		1,237,080		—		352,550		(5,561,703		)	61,305
Other assets, net	30,543		387,325		57,733		141,948		(233,708		)	383,841
Total assets	$	4,728,900	$	5,013,978	$	1,094,230	$	1,265,969	$	(6,889,087	)	$	5,213,990
Current liabilities
Accounts payable	$	1,055,527	$	160,834	$	17,680	$	95,856	$	(1,068,835	)	$	261,062
Accrued liabilities	8,754		203,608		11,225		77,372		(24,841		)	276,118
Total current liabilities	1,064,281		364,442		28,905		173,228		(1,093,676		)	537,180
Long-term debt	753,108		10,889		227,638		—		(227,638		)	763,997
Deferred income taxes	—		497,919		1,848		42,369		(6,070		)	536,066
Other liabilities	—		43,452		—		131,407		—			174,859
Total liabilities	1,817,389		916,702		258,391		347,004		(1,327,384		)	2,012,102
Total Westlake Chemical Corporation stockholders' equity	2,911,511		4,097,276		835,839		628,588		(5,561,703		)	2,911,511
Noncontrolling interests	—		—		—		290,377		—			290,377
Total equity	2,911,511		4,097,276		835,839		918,965		(5,561,703		)	3,201,888
Total liabilities and equity	$	4,728,900	$	5,013,978	$	1,094,230	$	1,265,969	$	(6,889,087	)	$	5,213,990

Condensed Consolidating Financial Information as of December 31, 2013

	Westlake Chemical Corporation		100% Owned Guarantor Subsidiaries		OpCo (Less Than 100% Owned Guarantor Subsidiary)		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Balance Sheet
Current assets
Cash and cash equivalents	$	420,948	$	6,227	$	—	$	34,126	$	—		$	461,301
Marketable securities	239,388		—		—		—		—			239,388
Accounts receivable, net	3,879		666,344		71,812		2,755		(316,333		)	428,457
Inventories	—		339,929		116,377		15,573		—			471,879
Prepaid expenses and other current assets	778		11,055		257		1,798		—			13,888
Deferred income taxes	441		28,974		4,448		306		—			34,169
Total current assets	665,434		1,052,529		192,894		54,558		(316,333		)	1,649,082
Property, plant and equipment, net	—		1,318,119		762,972		6,923		—			2,088,014
Equity investments	2,815,752		636,461		10,411		31,518		(3,427,267		)	66,875
Other assets, net	15,393		423,901		75,197		1,199		(258,752		)	256,938
Total assets	$	3,496,579	$	3,431,010	$	1,041,474	$	94,198	$	(4,002,352	)	$	4,060,909
Current liabilities
Accounts payable	$	316,652	$	100,570	$	122,564	$	10,649	$	(300,822	)	$	249,613
Accrued liabilities	8,334		134,452		26,688		1,282		(15,511		)	155,245
Total current liabilities	324,986		235,022		149,252		11,931		(316,333		)	404,858
Long-term debt	752,990		10,889		252,973		—		(252,973		)	763,879
Deferred income taxes	—		260,171		182,855		729		(5,779		)	437,976
Other liabilities	—		34,571		962		60		—			35,593
Total equity	2,418,603		2,890,357		455,432		81,478		(3,427,267		)	2,418,603
Total liabilities and equity	$	3,496,579	$	3,431,010	$	1,041,474	$	94,198	$	(4,002,352	)	$	4,060,909

Condensed Consolidating Financial Information for the Year Ended December 31, 2014

	Westlake Chemical Corporation			100% Owned Guarantor Subsidiaries			OpCo (Less Than 100% Owned Guarantor Subsidiary)			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Statement of Operations
Net sales	$	—		$	3,727,361		$	1,749,700		$	475,401		$	(1,537,112	)	$	4,415,350
Cost of sales	—			3,162,246			1,003,888			447,676			(1,515,810		)	3,098,000
Gross profit	—			565,115			745,812			27,725			(21,302		)	1,317,350
Selling, general and administrative expenses	2,082			144,987			26,870			40,722			(21,302		)	193,359
(Loss) income from operations	(2,082		)	420,128			718,942			(12,997		)	—			1,123,991
Interest expense	(39,763		)	(10		)	(10,499		)	(492		)	13,412			(37,352		)
Other income (expense), net	21,001			(4,921		)	3,151			(8,540		)	(13,412		)	(2,721		)
(Loss) income before income taxes	(20,844		)	415,197			711,594			(22,029		)	—			1,083,918
Provision for (benefit from) income taxes	248			202,501			199,388			(3,235		)	—			398,902
Equity in net income of subsidiaries	699,615			496,244			—			15,962			(1,211,821		)	—
Net income (loss)	678,523			708,940			512,206			(2,832		)	(1,211,821		)	685,016
Net income attributable to noncontrolling interests	—			—			—			6,493			—			6,493
Net income (loss) attributable to Westlake Chemical Corporation	$	678,523		$	708,940		$	512,206		$	(9,325	)	$	(1,211,821	)	$	678,523
Comprehensive income (loss) attributable to    Westlake Chemical Corporation	$	601,706		$	703,148		$	512,206		$	(80,407	)	$	(1,134,947	)	$	601,706

Condensed Consolidating Financial Information for the Year Ended December 31, 2013

	Westlake Chemical Corporation			100% Owned Guarantor Subsidiaries			OpCo (Less Than 100% Owned Guarantor Subsidiary)			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Statement of Operations
Net sales	$	—		$	3,195,406		$	2,127,747		$	48,016		$	(1,611,685	)	$	3,759,484
Cost of sales	—			2,971,258			1,255,140			43,333			(1,611,685		)	2,658,046
Gross profit	—			224,148			872,607			4,683			—			1,101,438
Selling, general and administrative expenses	2,128			114,211			25,451			6,184			—			147,974
(Loss) income from operations	(2,128		)	109,937			847,156			(1,501		)	—			953,464
Interest expense	(18,030		)	(52		)	(8,032		)	—			8,032			(18,082		)
Other income (expense), net	11,798			(2,438		)	7,701			(2,239		)	(8,032		)	6,790
(Loss) income before income taxes	(8,360		)	107,447			846,825			(3,740		)	—			942,172
(Benefit from) provision for income taxes	(2,031		)	34,340			300,279			(841		)	—			331,747
Equity in net income of subsidiaries	616,754			546,546			—			—			(1,163,300		)	—
Net income (loss) attributable to Westlake Chemical Corporation	$	610,425		$	619,653		$	546,546		$	(2,899	)	$	(1,163,300	)	$	610,425
Comprehensive income (loss) attributable to    Westlake Chemical Corporation	$	618,649		$	629,308		$	546,546		$	(4,506	)	$	(1,171,348	)	$	618,649

Condensed Consolidating Financial Information for the Year Ended December 31, 2012

	Westlake Chemical Corporation			100% Owned Guarantor Subsidiaries			OpCo (Less Than 100% Owned Guarantor Subsidiary)			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Statement of Operations
Net sales	$	—		$	2,788,088		$	2,249,098		$	48,205		$	(1,514,350	)	$	3,571,041
Cost of sales	—			2,693,592			1,613,446			41,393			(1,514,350		)	2,834,081
Gross profit	—			94,496			635,652			6,812			—			736,960
Selling, general and administrative expenses	2,004			89,030			24,103			6,472			—			121,609
(Loss) income from operations	(2,004		)	5,466			611,549			340			—			615,351
Interest expense	(42,989		)	(60		)	(8,937		)	—			8,937			(43,049		)
Debt retirement costs	(7,082		)	—			—			—			—			(7,082		)
Gain from sales of equity securities	1			16,428			—			—			—			16,429
Other income (expense), net	28,171			(16,633		)	4,186			(3,267		)	(8,937		)	3,520
(Loss) income before income taxes	(23,903		)	5,201			606,798			(2,927		)	—			585,169
Provision for (benefit from) income taxes	1,825			(11,821		)	210,878			(1,268		)	—			199,614
Equity in net income of subsidiaries	411,283			395,920			—			—			(807,203		)	—
Net income (loss) attributable to Westlake Chemical Corporation	$	385,555		$	412,942		$	395,920		$	(1,659	)	$	(807,203	)	$	385,555
Comprehensive income (loss) attributable to    Westlake Chemical Corporation	$	383,785		$	410,549		$	395,920		$	(1,036	)	$	(805,433	)	$	383,785

Condensed Consolidating Financial Information for the Year Ended December 31, 2014

	Westlake Chemical Corporation			100% Owned Guarantor Subsidiaries			OpCo (Less Than 100% Owned Guarantor Subsidiary)			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Statement of Cash Flows
Cash flows from operating activities
Net income (loss)	$	678,523		$	708,940		$	512,206		$	(2,832	)	$	(1,211,821	)	$	685,016
Adjustments to reconcile net income (loss) to net cash    (used for) provided by operating activities
Depreciation and amortization	1,673			111,389			77,611			19,486			—			210,159
Deferred income taxes	(288		)	55,344			8,608			(4,697		)	—			58,967
Net changes in working capital and other	(706,043		)	(1,077,982		)	4,879			645,559			1,211,821			78,234
Net cash (used for) provided by operating activities	(26,135		)	(202,309		)	603,304			657,516			—			1,032,376
Cash flows from investing activities
Acquisition of business, net of cash acquired	—			—			—			(611,087		)	—			(611,087		)
Additions to property, plant and equipment	—			(209,111		)	(202,823		)	(19,170		)	—			(431,104		)
Proceeds from disposition of assets	—			180			—			1			—			181
Proceeds from repayment of loan acquired	—			—			—			45,923			—			45,923
Proceeds from sales and maturities of securities	342,045			—			—			—			—			342,045
Purchase of securities	(117,332		)	—			—			—			—			(117,332		)
Settlements of derivative instruments	—			(1,698		)	(133		)	—			—			(1,831		)
Net cash provided by (used for) investing activities	224,713			(210,629		)	(202,956		)	(584,333		)	—			(773,205		)
Cash flows from financing activities
Intercompany financing	155,665			(244,122		)	102,702			(14,245		)	—			—
Net distributions prior to Westlake Partners initial public offering	—			448,101			(448,101		)	—			—			—
Capitalized debt issuance costs	(1,186		)	—			—			—			—			(1,186		)
Dividends paid	(77,656		)	151,729			(151,729		)	—			—			(77,656		)
Distributions paid	—			54,060			(57,763		)	1,499			—			(2,204		)
Net proceeds from issuance of Westlake Partners common units	—			—			—			286,088			—			286,088
Purchase of limited partner interests	—			—			286,088			(286,088		)	—			—
Proceeds from exercise of stock options	5,524			—			—			—			—			5,524
Repurchase of common stock for treasury	(52,630		)	—			—			—			—			(52,630		)
Windfall tax benefits from share-based payment arrangements	6,704			—			—			—			—			6,704
Net cash provided by (used for) financing activities	36,421			409,768			(268,803		)	(12,746		)	—			164,640

	Westlake Chemical Corporation		100% Owned Guarantor Subsidiaries			OpCo (Less Than 100% Owned Guarantor Subsidiary)		Non-Guarantor Subsidiaries			Eliminations		Consolidated
Effect of exchange rate changes on cash and cash equivalents	—		—			—		(4,511		)	—		(4,511		)
Net increase (decrease) in cash and cash equivalents	234,999		(3,170		)	131,545		55,926			—		419,300
Cash and cash equivalents at beginning of the year	420,948		6,227			—		34,126			—		461,301
Cash and cash equivalents at end of the year	$	655,947	$	3,057		$	131,545	$	90,052		$	—	$	880,601

Condensed Consolidating Financial Information for the Year Ended December 31, 2013

	Westlake Chemical Corporation			100% Owned Guarantor Subsidiaries			OpCo (Less Than 100% Owned Guarantor Subsidiary)			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Statement of Cash Flows
Cash flows from operating activities
Net income (loss)	$	610,425		$	619,653		$	546,546		$	(2,899	)	$	(1,163,300	)	$	610,425
Adjustments to reconcile net income (loss) to net cash (used for)    provided by operating activities
Depreciation and amortization	1,459			81,897			73,463			2,448			—			159,267
Deferred income taxes	74			56,787			37,054			(183		)	—			93,732
Net changes in working capital and other	(622,194		)	(607,033		)	(54,554		)	9,786			1,163,300			(110,695		)
Net cash (used for) provided by operating activities	(10,236		)	151,304			602,509			9,152			—			752,729
Cash flows from investing activities
Acquisition of business	—			(178,309		)	—			—			—			(178,309		)
Additions to equity investments	—			(23,338		)	—			—			—			(23,338		)
Additions to property, plant and equipment	—			(453,538		)	(223,130		)	(2,554		)	—			(679,222		)
Construction of assets pending sale-leaseback	—			(136		)	—			—			—			(136		)
Proceeds from disposition of assets	—			75			—			76			—			151
Proceeds from repayment of loan to affiliate	—			—			—			167			—			167
Proceeds from sales and maturities of securities	252,519			—			—			—			—			252,519
Purchase of securities	(367,150		)	—			—			—			—			(367,150		)
Settlements of derivative instruments	—			—			(6,920		)	—			—			(6,920		)
Net cash (used for) provided by investing activities	(114,631		)	(655,246		)	(230,050		)	(2,311		)	—			(1,002,238		)
Cash flows from financing activities
Intercompany financing	(128,798		)	(100,330		)	231,067			(1,939		)	—			—
Net distributions prior to Westlake Partners initial public offering	—			603,526			(603,526		)	—			—			—
Dividends paid	(55,236		)	—			—			—			—			(55,236		)
Proceeds from exercise of stock options	3,437			—			—			—			—			3,437
Repurchase of common stock for treasury	(32,918		)	—			—			—			—			(32,918		)
Windfall tax benefits from share-based payment arrangements	5,449			—			—			—			—			5,449
Net cash (used for) provided by financing activities	(208,066		)	503,196			(372,459		)	(1,939		)	—			(79,268		)

	Westlake Chemical Corporation			100% Owned Guarantor Subsidiaries			OpCo (Less Than 100% Owned Guarantor Subsidiary)		Non-Guarantor Subsidiaries		Eliminations		Consolidated
Net (decrease) increase in cash and cash equivalents	(332,933		)	(746		)	—		4,902		—		(328,777		)
Cash and cash equivalents at beginning of the year	753,881			6,973			—		29,224		—		790,078
Cash and cash equivalents at end of the year	$	420,948		$	6,227		$	—	$	34,126	$	—	$	461,301

Condensed Consolidating Financial Information for the Year Ended December 31, 2012

	Westlake Chemical Corporation			100% Owned Guarantor Subsidiaries			OpCo (Less Than 100% Owned Guarantor Subsidiary)			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Statement of Cash Flows
Cash flows from operating activities
Net income (loss)	$	385,555		$	412,942		$	395,920		$	(1,659	)	$	(807,203	)	$	385,555
Adjustments to reconcile net income (loss) to net cash (used for)    provided by operating activities
Depreciation and amortization	1,514			77,131			64,257			3,153			—			146,055
Deferred income taxes	45			2,134			(8,096		)	124			—			(5,793		)
Net changes in working capital and other	(422,199		)	(345,730		)	44,740			2,256			807,203			86,270
Net cash (used for) provided by operating activities	(35,085		)	146,477			496,821			3,874			—			612,087
Cash flows from investing activities
Additions to property, plant and equipment	—			(227,479		)	(158,440		)	(963		)	—			(386,882		)
Construction of assets pending sale-leaseback	—			(4,308		)	—			—			—			(4,308		)
Proceeds from disposition of assets	—			449			—			22			—			471
Proceeds from repayment of loan to affiliate	—			—			—			1,192			—			1,192
Proceeds from sale-leaseback of assets	—			2,304			—			—			—			2,304
Proceeds from sales of equity securities	3			47,652			—			—			—			47,655
Purchase of securities	(124,873		)	(2,961		)	—			—			—			(127,834		)
Settlements of derivative instruments	—			(1		)	432			—			—			431
Net cash (used for) provided by investing activities	(124,870		)	(184,344		)	(158,008		)	251			—			(466,971		)
Cash flows from financing activities
Intercompany financing	291,455			(296,490		)	—			5,035			—			—
Net distributions prior to Westlake Partners initial public offering	—			338,813			(338,813		)	—			—			—
Capitalized debt issuance costs	(2,221		)	—			—			—			—			(2,221		)
Dividends paid	(285,521		)	—			—			—			—			(285,521		)
Proceeds from debt issuance	248,818			—			—			—			—			248,818
Proceeds from exercise of stock options	10,369			—			—			—			—			10,369
Repayment of debt	(250,000		)	—			—			—			—			(250,000		)
Repurchase of common stock for treasury	(10,784		)	—			—			—			—			(10,784		)
Utilization of restricted cash	96,433			—			—			—			—			96,433

	Westlake Chemical Corporation			100% Owned Guarantor Subsidiaries		OpCo (Less Than 100% Owned Guarantor Subsidiary)			Non-Guarantor Subsidiaries		Eliminations		Consolidated
Windfall tax benefits from share-based payment arrangements	11,967			—		—			—		—		11,967
Net cash provided by (used for) financing activities	110,516			42,323		(338,813		)	5,035		—		(180,939		)
Net (decrease) increase in cash and cash equivalents	(49,439		)	4,456		—			9,160		—		(35,823		)
Cash and cash equivalents at beginning of the year	803,320			2,517		—			20,064		—		825,901
Cash and cash equivalents at end of the year	$	753,881		$	6,973	$	—		$	29,224	$	—	$	790,078

Condensed Consolidating Financial Information Statement Of Operations

Condensed Consolidating Financial Information for the Year Ended December 31, 2014

	Westlake Chemical Corporation			100% Owned Guarantor Subsidiaries			OpCo (Less Than 100% Owned Guarantor Subsidiary)			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Statement of Operations
Net sales	$	—		$	3,727,361		$	1,749,700		$	475,401		$	(1,537,112	)	$	4,415,350
Cost of sales	—			3,162,246			1,003,888			447,676			(1,515,810		)	3,098,000
Gross profit	—			565,115			745,812			27,725			(21,302		)	1,317,350
Selling, general and administrative expenses	2,082			144,987			26,870			40,722			(21,302		)	193,359
(Loss) income from operations	(2,082		)	420,128			718,942			(12,997		)	—			1,123,991
Interest expense	(39,763		)	(10		)	(10,499		)	(492		)	13,412			(37,352		)
Other income (expense), net	21,001			(4,921		)	3,151			(8,540		)	(13,412		)	(2,721		)
(Loss) income before income taxes	(20,844		)	415,197			711,594			(22,029		)	—			1,083,918
Provision for (benefit from) income taxes	248			202,501			199,388			(3,235		)	—			398,902
Equity in net income of subsidiaries	699,615			496,244			—			15,962			(1,211,821		)	—
Net income (loss)	678,523			708,940			512,206			(2,832		)	(1,211,821		)	685,016
Net income attributable to noncontrolling interests	—			—			—			6,493			—			6,493
Net income (loss) attributable to Westlake Chemical Corporation	$	678,523		$	708,940		$	512,206		$	(9,325	)	$	(1,211,821	)	$	678,523
Comprehensive income (loss) attributable to    Westlake Chemical Corporation	$	601,706		$	703,148		$	512,206		$	(80,407	)	$	(1,134,947	)	$	601,706

Condensed Consolidating Financial Information for the Year Ended December 31, 2013

	Westlake Chemical Corporation			100% Owned Guarantor Subsidiaries			OpCo (Less Than 100% Owned Guarantor Subsidiary)			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Statement of Operations
Net sales	$	—		$	3,195,406		$	2,127,747		$	48,016		$	(1,611,685	)	$	3,759,484
Cost of sales	—			2,971,258			1,255,140			43,333			(1,611,685		)	2,658,046
Gross profit	—			224,148			872,607			4,683			—			1,101,438
Selling, general and administrative expenses	2,128			114,211			25,451			6,184			—			147,974
(Loss) income from operations	(2,128		)	109,937			847,156			(1,501		)	—			953,464
Interest expense	(18,030		)	(52		)	(8,032		)	—			8,032			(18,082		)
Other income (expense), net	11,798			(2,438		)	7,701			(2,239		)	(8,032		)	6,790
(Loss) income before income taxes	(8,360		)	107,447			846,825			(3,740		)	—			942,172
(Benefit from) provision for income taxes	(2,031		)	34,340			300,279			(841		)	—			331,747
Equity in net income of subsidiaries	616,754			546,546			—			—			(1,163,300		)	—
Net income (loss) attributable to Westlake Chemical Corporation	$	610,425		$	619,653		$	546,546		$	(2,899	)	$	(1,163,300	)	$	610,425
Comprehensive income (loss) attributable to    Westlake Chemical Corporation	$	618,649		$	629,308		$	546,546		$	(4,506	)	$	(1,171,348	)	$	618,649

Condensed Consolidating Financial Information for the Year Ended December 31, 2012

	Westlake Chemical Corporation			100% Owned Guarantor Subsidiaries			OpCo (Less Than 100% Owned Guarantor Subsidiary)			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Statement of Operations
Net sales	$	—		$	2,788,088		$	2,249,098		$	48,205		$	(1,514,350	)	$	3,571,041
Cost of sales	—			2,693,592			1,613,446			41,393			(1,514,350		)	2,834,081
Gross profit	—			94,496			635,652			6,812			—			736,960
Selling, general and administrative expenses	2,004			89,030			24,103			6,472			—			121,609
(Loss) income from operations	(2,004		)	5,466			611,549			340			—			615,351
Interest expense	(42,989		)	(60		)	(8,937		)	—			8,937			(43,049		)
Debt retirement costs	(7,082		)	—			—			—			—			(7,082		)
Gain from sales of equity securities	1			16,428			—			—			—			16,429
Other income (expense), net	28,171			(16,633		)	4,186			(3,267		)	(8,937		)	3,520
(Loss) income before income taxes	(23,903		)	5,201			606,798			(2,927		)	—			585,169
Provision for (benefit from) income taxes	1,825			(11,821		)	210,878			(1,268		)	—			199,614
Equity in net income of subsidiaries	411,283			395,920			—			—			(807,203		)	—
Net income (loss) attributable to Westlake Chemical Corporation	$	385,555		$	412,942		$	395,920		$	(1,659	)	$	(807,203	)	$	385,555
Comprehensive income (loss) attributable to    Westlake Chemical Corporation	$	383,785		$	410,549		$	395,920		$	(1,036	)	$	(805,433	)	$	383,785

Condensed Consolidating Financial Information Statement Of Cash Flows

Condensed Consolidating Financial Information for the Year Ended December 31, 2014

	Westlake Chemical Corporation			100% Owned Guarantor Subsidiaries			OpCo (Less Than 100% Owned Guarantor Subsidiary)			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Statement of Cash Flows
Cash flows from operating activities
Net income (loss)	$	678,523		$	708,940		$	512,206		$	(2,832	)	$	(1,211,821	)	$	685,016
Adjustments to reconcile net income (loss) to net cash    (used for) provided by operating activities
Depreciation and amortization	1,673			111,389			77,611			19,486			—			210,159
Deferred income taxes	(288		)	55,344			8,608			(4,697		)	—			58,967
Net changes in working capital and other	(706,043		)	(1,077,982		)	4,879			645,559			1,211,821			78,234
Net cash (used for) provided by operating activities	(26,135		)	(202,309		)	603,304			657,516			—			1,032,376
Cash flows from investing activities
Acquisition of business, net of cash acquired	—			—			—			(611,087		)	—			(611,087		)
Additions to property, plant and equipment	—			(209,111		)	(202,823		)	(19,170		)	—			(431,104		)
Proceeds from disposition of assets	—			180			—			1			—			181
Proceeds from repayment of loan acquired	—			—			—			45,923			—			45,923
Proceeds from sales and maturities of securities	342,045			—			—			—			—			342,045
Purchase of securities	(117,332		)	—			—			—			—			(117,332		)
Settlements of derivative instruments	—			(1,698		)	(133		)	—			—			(1,831		)
Net cash provided by (used for) investing activities	224,713			(210,629		)	(202,956		)	(584,333		)	—			(773,205		)
Cash flows from financing activities
Intercompany financing	155,665			(244,122		)	102,702			(14,245		)	—			—
Net distributions prior to Westlake Partners initial public offering	—			448,101			(448,101		)	—			—			—
Capitalized debt issuance costs	(1,186		)	—			—			—			—			(1,186		)
Dividends paid	(77,656		)	151,729			(151,729		)	—			—			(77,656		)
Distributions paid	—			54,060			(57,763		)	1,499			—			(2,204		)
Net proceeds from issuance of Westlake Partners common units	—			—			—			286,088			—			286,088
Purchase of limited partner interests	—			—			286,088			(286,088		)	—			—
Proceeds from exercise of stock options	5,524			—			—			—			—			5,524
Repurchase of common stock for treasury	(52,630		)	—			—			—			—			(52,630		)
Windfall tax benefits from share-based payment arrangements	6,704			—			—			—			—			6,704
Net cash provided by (used for) financing activities	36,421			409,768			(268,803		)	(12,746		)	—			164,640

	Westlake Chemical Corporation		100% Owned Guarantor Subsidiaries			OpCo (Less Than 100% Owned Guarantor Subsidiary)		Non-Guarantor Subsidiaries			Eliminations		Consolidated
Effect of exchange rate changes on cash and cash equivalents	—		—			—		(4,511		)	—		(4,511		)
Net increase (decrease) in cash and cash equivalents	234,999		(3,170		)	131,545		55,926			—		419,300
Cash and cash equivalents at beginning of the year	420,948		6,227			—		34,126			—		461,301
Cash and cash equivalents at end of the year	$	655,947	$	3,057		$	131,545	$	90,052		$	—	$	880,601

Condensed Consolidating Financial Information for the Year Ended December 31, 2013

	Westlake Chemical Corporation			100% Owned Guarantor Subsidiaries			OpCo (Less Than 100% Owned Guarantor Subsidiary)			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Statement of Cash Flows
Cash flows from operating activities
Net income (loss)	$	610,425		$	619,653		$	546,546		$	(2,899	)	$	(1,163,300	)	$	610,425
Adjustments to reconcile net income (loss) to net cash (used for)    provided by operating activities
Depreciation and amortization	1,459			81,897			73,463			2,448			—			159,267
Deferred income taxes	74			56,787			37,054			(183		)	—			93,732
Net changes in working capital and other	(622,194		)	(607,033		)	(54,554		)	9,786			1,163,300			(110,695		)
Net cash (used for) provided by operating activities	(10,236		)	151,304			602,509			9,152			—			752,729
Cash flows from investing activities
Acquisition of business	—			(178,309		)	—			—			—			(178,309		)
Additions to equity investments	—			(23,338		)	—			—			—			(23,338		)
Additions to property, plant and equipment	—			(453,538		)	(223,130		)	(2,554		)	—			(679,222		)
Construction of assets pending sale-leaseback	—			(136		)	—			—			—			(136		)
Proceeds from disposition of assets	—			75			—			76			—			151
Proceeds from repayment of loan to affiliate	—			—			—			167			—			167
Proceeds from sales and maturities of securities	252,519			—			—			—			—			252,519
Purchase of securities	(367,150		)	—			—			—			—			(367,150		)
Settlements of derivative instruments	—			—			(6,920		)	—			—			(6,920		)
Net cash (used for) provided by investing activities	(114,631		)	(655,246		)	(230,050		)	(2,311		)	—			(1,002,238		)
Cash flows from financing activities
Intercompany financing	(128,798		)	(100,330		)	231,067			(1,939		)	—			—
Net distributions prior to Westlake Partners initial public offering	—			603,526			(603,526		)	—			—			—
Dividends paid	(55,236		)	—			—			—			—			(55,236		)
Proceeds from exercise of stock options	3,437			—			—			—			—			3,437
Repurchase of common stock for treasury	(32,918		)	—			—			—			—			(32,918		)
Windfall tax benefits from share-based payment arrangements	5,449			—			—			—			—			5,449
Net cash (used for) provided by financing activities	(208,066		)	503,196			(372,459		)	(1,939		)	—			(79,268		)

	Westlake Chemical Corporation			100% Owned Guarantor Subsidiaries			OpCo (Less Than 100% Owned Guarantor Subsidiary)		Non-Guarantor Subsidiaries		Eliminations		Consolidated
Net (decrease) increase in cash and cash equivalents	(332,933		)	(746		)	—		4,902		—		(328,777		)
Cash and cash equivalents at beginning of the year	753,881			6,973			—		29,224		—		790,078
Cash and cash equivalents at end of the year	$	420,948		$	6,227		$	—	$	34,126	$	—	$	461,301

Condensed Consolidating Financial Information for the Year Ended December 31, 2012

	Westlake Chemical Corporation			100% Owned Guarantor Subsidiaries			OpCo (Less Than 100% Owned Guarantor Subsidiary)			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Statement of Cash Flows
Cash flows from operating activities
Net income (loss)	$	385,555		$	412,942		$	395,920		$	(1,659	)	$	(807,203	)	$	385,555
Adjustments to reconcile net income (loss) to net cash (used for)    provided by operating activities
Depreciation and amortization	1,514			77,131			64,257			3,153			—			146,055
Deferred income taxes	45			2,134			(8,096		)	124			—			(5,793		)
Net changes in working capital and other	(422,199		)	(345,730		)	44,740			2,256			807,203			86,270
Net cash (used for) provided by operating activities	(35,085		)	146,477			496,821			3,874			—			612,087
Cash flows from investing activities
Additions to property, plant and equipment	—			(227,479		)	(158,440		)	(963		)	—			(386,882		)
Construction of assets pending sale-leaseback	—			(4,308		)	—			—			—			(4,308		)
Proceeds from disposition of assets	—			449			—			22			—			471
Proceeds from repayment of loan to affiliate	—			—			—			1,192			—			1,192
Proceeds from sale-leaseback of assets	—			2,304			—			—			—			2,304
Proceeds from sales of equity securities	3			47,652			—			—			—			47,655
Purchase of securities	(124,873		)	(2,961		)	—			—			—			(127,834		)
Settlements of derivative instruments	—			(1		)	432			—			—			431
Net cash (used for) provided by investing activities	(124,870		)	(184,344		)	(158,008		)	251			—			(466,971		)
Cash flows from financing activities
Intercompany financing	291,455			(296,490		)	—			5,035			—			—
Net distributions prior to Westlake Partners initial public offering	—			338,813			(338,813		)	—			—			—
Capitalized debt issuance costs	(2,221		)	—			—			—			—			(2,221		)
Dividends paid	(285,521		)	—			—			—			—			(285,521		)
Proceeds from debt issuance	248,818			—			—			—			—			248,818
Proceeds from exercise of stock options	10,369			—			—			—			—			10,369
Repayment of debt	(250,000		)	—			—			—			—			(250,000		)
Repurchase of common stock for treasury	(10,784		)	—			—			—			—			(10,784		)
Utilization of restricted cash	96,433			—			—			—			—			96,433

	Westlake Chemical Corporation			100% Owned Guarantor Subsidiaries		OpCo (Less Than 100% Owned Guarantor Subsidiary)			Non-Guarantor Subsidiaries		Eliminations		Consolidated
Windfall tax benefits from share-based payment arrangements	11,967			—		—			—		—		11,967
Net cash provided by (used for) financing activities	110,516			42,323		(338,813		)	5,035		—		(180,939		)
Net (decrease) increase in cash and cash equivalents	(49,439		)	4,456		—			9,160		—		(35,823		)
Cash and cash equivalents at beginning of the year	803,320			2,517		—			20,064		—		825,901
Cash and cash equivalents at end of the year	$	753,881		$	6,973	$	—		$	29,224	$	—	$	790,078