Segment Information (Details)	3 Months Ended
Mar. 31, 2020 customer segment	Mar. 31, 2019 customer
Revenue, Major Customer [Line Items]
Number of operating segments \| segment	1
Ten Largest Third-party TiO2 Customers \| Revenue Benchmark \| Customer Concentration Risk
Revenue, Major Customer [Line Items]
Number of largest customers representing specified percentage of net sales \| customer	10	10
Concentration percentage	29.00%	42.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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