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Accumulated Other Comprehensive Income (Loss) (Tables)
 12 Months Ended
Dec. 31, 2019
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss)
Changes in accumulated other comprehensive income (loss) by component 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, 2017
 
$
43

 
$
(36
)
 
$
7

Other comprehensive income (loss) before reclassifications
 
(14
)
 
(57
)
 
(71
)
Amounts reclassified from accumulated other comprehensive income (loss)
 
(11
)
 
—

 
(11
)
Reclassification of certain tax effects to retained earnings (1)
 
9

 
4

 
13

Net other comprehensive loss attributable to Westlake Chemical Corporation
 
(16
)
 
(53
)
 
(69
)
Balances at December 31, 2018
 
27

 
(89
)
 
(62
)
Other comprehensive income (loss) before reclassifications
 
(24
)
 
12

 
(12
)
Amounts reclassified from accumulated other comprehensive income (loss)
 
—

 
—

 
—

Net other comprehensive income (loss) attributable to Westlake Chemical Corporation
 
(24
)
 
12

 
(12
)
Balances at December 31, 2019
 
$
3

 
$
(77
)
 
$
(74
)


______________________________
(1)
In 2018, the Company reclassified certain income tax effects to retained earnings upon adoption of ASU No. 2018-02. See Note 1 (Income taxes) for additional information.
Reclassification out of Accumulated Other Comprehensive Income
The following table provides the details of the amounts reclassified from accumulated other comprehensive income (loss) into net income in the consolidated statements of operations:
Details about Accumulated Other Comprehensive Income (Loss) Components
 
Location of Reclassification
(Income (Expense)) in
Consolidated Statements
of Operations
 
Year Ended December 31,
 
2019
 
2018
 
2017
Amortization of pension and other post-retirement net loss
 
(1)
 
$
—

 
$
—

 
$
(2
)
Pension settlement gain
 
(1)
 
—

 
14

 
—

Income tax benefit (provision) on pension and other post-retirement benefits
 
Provision for (benefit from) income taxes
 
—

 
(3
)
 
—

Total reclassifications for the period
 
 
 
$
—

 
$
11

 
$
(2
)

______________________________
(1)
These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost and reflected in other income, net in the consolidated statements of operations. See Note 14 for additional information on the pension settlement gain recognized in 2018.