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Accumulated Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 31, 2020
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | Changes in accumulated other comprehensive income (loss) by component for the three months ended March 31, 2020 and 2019 were as follows:
|  | Pension and Other Post-Retirement Benefits Liability, Net of Tax |  | Cumulative Foreign Currency Exchange, Net of Tax |  | Total
Balances at December 31, 2019 |  | $ | 3 |  |  | $ | (77 | ) |  | $ | (74 | )
Other comprehensive loss before reclassifications |  | — |  |  | (32 | ) |  | (32 | )
Net other comprehensive loss attributable to Westlake Chemical Corporation |  | — |  |  | (32 | ) |  | (32 | )
Balances at March 31, 2020 |  | $ | 3 |  |  | $ | (109 | ) |  | $ | (106 | )
Balances at December 31, 2018 |  | $ | 27 |  |  | $ | (89 | ) |  | $ | (62 | )
Other comprehensive loss before reclassifications |  | — |  |  | (2 | ) |  | (2 | )
Net other comprehensive loss attributable to Westlake Chemical Corporation |  | — |  |  | (2 | ) |  | (2 | )
Balances at March 31, 2019 |  | $ | 27 |  |  | $ | (91 | ) |  | $ | (64 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 + Details
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