Segment Information Summarized Financial Information by Reportable Segments (Footnote) (Details) - Rockwood Holdings, Inc. - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2015	Jan. 12, 2015
Segment Reporting Information [Line Items]
Inventory markup			$ 103.4
Utilization of inventory markup	$ 37.3	$ 85.5
Cost of Sales
Segment Reporting Information [Line Items]
Utilization of inventory markup	24.2	47.5
Equity in Net Income of Unconsolidated Investments
Segment Reporting Information [Line Items]
Utilization of inventory markup	$ 10.0	$ 17.9