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Investments - Ownership Positions in Significant Unconsolidated (Detail) | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
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Nippon Aluminum Alkyls |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Percentage of interest in joint ventures | 50.00% | 50.00% | 50.00%
Magnifin Magnesiaprodukte GmbH & Co. KG |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Percentage of interest in joint ventures | 50.00% | 50.00% | 50.00%
Nippon Ketjen Company Limited |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Percentage of interest in joint ventures | 50.00% | 50.00% | 50.00%
Eurecat S.A. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Percentage of interest in joint ventures | 50.00% | 50.00% | 50.00%
Fabrica Carioca de Catalisadores S.A. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Percentage of interest in joint ventures | 50.00% | 50.00% | 50.00%
Stannica, LLC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Percentage of interest in joint ventures | 50.00% | 50.00% | 50.00%

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