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Acquisitions Acquisitions (Details 1) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Feb. 12, 2015
Business Acquisition [Line Items]
Goodwill	$ 1,849,852,000us-gaap_Goodwill	$ 1,760,249,000us-gaap_Goodwill
Convergence Pharmaceuticals
Business Acquisition [Line Items]
In-process research and development and other intangible assets			424,600,000
Other intangible assets			7,600,000
Goodwill			92,300,000
Deferred tax liability			(84,900,000)
Other, net			(1,000,000)
Total purchase price			$ 438,600,000