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v3.20.1

Consolidated Statements Of Changes In Stockholders' Equity Statement - USD ($) $ in Millions | Total | Common Stock [Member] | Common Stock, Held in Treasury [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Noncontrolling Interests [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balances at Dec. 31, 2018 | $ 6,076 | $ 1 | $ (382) | $ 556 | $ 5,477 | $ (62) | $ 486
Beginning balance, shares issued at Dec. 31, 2018 |  | 134,651,380 |  |  |  |  |
Beginning balance, Treasury shares at Dec. 31, 2018 |  |  | 6,183,125 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income attributable to Westlake Chemical Corporation | 72 |  |  |  | 72 |  |
Net income attributable to noncontrolling interests | 10 |  |  |  |  |  | 10
Net income | 82 |  |  |  |  |  |
Other comprehensive income (loss) | (2) |  |  |  |  | (2) | 0
Shares issued—stock- based compensation (in shares) |  |  | (124,052) |  |  |  |
Shares issued—stock-based compensation | 0 |  | $ 11 | (8) | (3) |  |
Stock-based compensation | 7 |  |  | 7 |  |  |
Dividends declared | (33) |  |  |  | (33) |  |
Distributions to noncontrolling interests | (8) |  |  |  |  |  | (8)
Issuance of Westlake Chemical Partners LP common units | 63 |  |  | (2) |  |  | 65
Ending balances at Mar. 31, 2019 | 6,185 | $ 1 | $ (371) | 553 | 5,513 | (64) | 553
Ending balance, shares issued at Mar. 31, 2019 |  | 134,651,380 |  |  |  |  |
Ending balance, Treasury shares at Mar. 31, 2019 |  |  | 6,059,073 |  |  |  |
Beginning balances at Dec. 31, 2019 | 6,403 | $ 1 | $ (377) | 553 | 5,757 | (74) | 543
Beginning balance, shares issued at Dec. 31, 2019 |  | 134,651,380 |  |  |  |  |
Beginning balance, Treasury shares at Dec. 31, 2019 |  |  | 6,266,609 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income attributable to Westlake Chemical Corporation | 145 |  |  |  | 145 |  |
Net income attributable to noncontrolling interests | 12 |  |  |  |  |  | 12
Net income | 157 |  |  |  |  |  |
Other comprehensive income (loss) | (32) |  |  |  |  | (32) | 0
Common stock repurchased, shares |  |  | 995,529 |  |  |  |
Common stock repurchased | (54) |  | $ (54) |  |  |  |
Shares issued—stock- based compensation (in shares) |  |  | (282,476) |  |  |  |
Shares issued—stock-based compensation | 2 |  | $ 18 | (8) | (8) |  |
Stock-based compensation | 6 |  |  | 6 |  |  |
Dividends declared | (34) |  |  |  | (34) |  |
Distributions to noncontrolling interests | (10) |  |  |  |  |  | (10)
Ending balances at Mar. 31, 2020 | $ 6,438 | $ 1 | $ (413) | $ 551 | $ 5,860 | $ (106) | $ 545
Ending balance, shares issued at Mar. 31, 2020 |  | 134,651,380 |  |  |  |  |
Ending balance, Treasury shares at Mar. 31, 2020 |  |  | 6,979,662 |  |  |  |

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