Acquisitions Acquisitions (Details 1) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Feb. 12, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill	$ 3,669.3	$ 2,663.8		$ 1,760.2
Convergence Pharmaceuticals
Business Acquisition [Line Items]
In-process research and development			$ 424.6
Other intangible assets			7.6
Goodwill			128.3
Deferred tax liability			(84.9)
Other, net			(1.0)
Total purchase price			$ 474.6