Goodwill and Other Intangibles Goodwill and Other Intangibles (Footnote) (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Goodwill		$ 1,500,000	$ 1,500,000
Other intangibles, net of amortization		1,300,000	1,400,000
Trade names and trademarks
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible asset, gross carrying amount		8,800	8,700
Chemetall Surface Treatment
Finite-Lived Intangible Assets [Line Items]
Goodwill		1,456,214	1,433,259
Acquisition of Rockwood	[1]	3,200
Other intangibles, net of amortization		$ 1,328,799	$ 1,349,179

[1] Represents final purchase price adjustments for the Rockwood acquisition recorded in the nine-month period ended September 30, 2016. Excludes $3.2 million of final purchase price adjustments for businesses reported as discontinued operations.