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0613 - Disclosure - Financial instruments and fair value measurements (Details)
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0213 - Disclosure - Financial instruments and fair value measurements
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0214 - Disclosure - Recent accounting standards
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06081 - Disclosure - Long-term debt (Details Textual)
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06121 - Disclosure - Commitments and contingencies (Details Textual)
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0612 - Disclosure - Commitments and contingencies (Details)
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0611 - Disclosure - Income tax provision (Details)
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0606 - Disclosure - Other noncurrent assets (Details)
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0506 - Disclosure - Other noncurrent assets (Tables)
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06053 - Disclosure - Investment in Kronos Worldwide, Inc. (Details Textual)
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06052 - Disclosure - Investment in Kronos Worldwide, Inc. (Details 2)
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06051 - Disclosure - Investment in Kronos Worldwide, Inc. (Details 1)
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0605 - Disclosure - Investment in Kronos Worldwide, Inc. (Details)
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0505 - Disclosure - Investment in Kronos Worldwide, Inc. (Tables)
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06041 - Disclosure - Marketable securities (Details Textual)
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0604 - Disclosure - Marketable securities (Details)
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0504 - Disclosure - Marketable securities (Tables)
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0603 - Disclosure - Inventories, net (Details)
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0503 - Disclosure - Inventories, net (Tables)
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0601 - Disclosure - Organization and basis of presentation (Details)
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