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Supplemental Cash Flow Information Footnote (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Cash Flow Supplemental Disclosures [Line Items] |  |  |
Foreign earnings repatriated | $ 308.4 | $ 1,400.0 | $ 12.6
Foreign currency exchange rate losses (gains) | $ 40.8 | (70.7) | $ 1.1
Rockwood Holdings, Inc. |  |  |
Cash Flow Supplemental Disclosures [Line Items] |  |  |
Foreign earnings repatriated |  | $ 111.0 |

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