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Segment Information Summarized Financial Information by Reportable Segments (Footnote) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Jan. 12, 2015
Research and Development Expense |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Write-off of fixed assets | $ 1.4 |  | $ 1.4 |  |
Other Income |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net gain on sale of properties | $ 0.9 |  | $ 0.9 |  |
Rockwood Holdings, Inc. |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Inventory markup |  |  |  |  | $ 103.4
Utilization of inventory markup |  | $ 16.8 |  | $ 102.3 |
Rockwood Holdings, Inc. | Cost of Sales |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Utilization of inventory markup |  | 7.7 |  | 55.4 |
Rockwood Holdings, Inc. | Equity in Net Income of Unconsolidated Investments |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Utilization of inventory markup |  | $ 9.1 |  | $ 26.9 |

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- Definition The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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