Supplemental Cash Flow Information Footnote (Details) - USD ($) $ in Millions	12 Months Ended
	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