Acquisitions - Additional Information (Details) - USD ($) $ in Thousands			3 Months Ended		12 Months Ended
		Jan. 12, 2015	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Dec. 31, 2015	[1]
Business Acquisition [Line Items]
Goodwill			$ 2,931,293		$ 2,931,293	$ 2,893,811
Acquisition and integration related costs	[2]		21,356	$ 59,523
Utilization of inventory markup	[3]		154	48,186
Rockwood Holdings, Inc.
Business Acquisition [Line Items]
Total purchase price		$ 5,725,321
Goodwill		$ 2,818,627
Change in purchase price allocation, goodwill			1,500		$ 193,800
Acquisition and integration related costs			19,700	57,400
Acquired finite-lived intangible assets, weighted average useful life		23 years
Utilization of inventory markup				48,200
Other significant projects
Business Acquisition [Line Items]
Acquisition and integration related costs			1,700	2,100
Patents and technology | Rockwood Holdings, Inc.
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, weighted average useful life		20 years
Trade names and trademarks | Rockwood Holdings, Inc.
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, weighted average useful life		20 years
Customer lists and relationships | Rockwood Holdings, Inc.
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, weighted average useful life		24 years
Cost of Sales | Rockwood Holdings, Inc.
Business Acquisition [Line Items]
Acquisition measurement period adjustments			4,300
Utilization of inventory markup			$ 200	$ 40,300

[1] The December 31, 2015 balances have been recast to reflect a change in segments. See Note 12, "Segment Information," for further details.

[2] See Note 2, “Acquisitions.”

[3] In connection with the acquisition of Rockwood, the Company valued Rockwood’s existing inventory at fair value as of the Acquisition Closing Date, which resulted in a markup of the underlying net book value of the inventory totaling approximately $103 million. The inventory markup was expensed over the estimated remaining selling period. For the three-month period ended March 31, 2016, $0.2 million was included in Cost of goods sold related to the utilization of the inventory markup as a result of a measurement-period adjustment. For the three-month period ended March 31, 2015, $40.3 million was included in Cost of goods sold, and Equity in net income of unconsolidated investments was reduced by $7.9 million, respectively, related to the utilization of the inventory markup.