Property, Plant and Equipment Property, Plant and Equipment (Details) SFr in Millions, $ in Millions	3 Months Ended
	Jun. 30, 2016 USD ($)	Dec. 31, 2015 CHF (SFr)	Dec. 31, 2015 USD ($)
Property, Plant and Equipment [Line Items]
Accumulated depreciation	$ 1,471.0		$ 1,330.1
Property, plant and equipment, net	2,301.8		2,187.6
Solothurn, Switzerland
Property, Plant and Equipment [Line Items]
Construction in progress	247.8		99.0
Solothurn, Switzerland | Land
Property, Plant and Equipment [Line Items]
Land purchase		SFr 64.4	$ 62.5
Cambridge, MA
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	43.0
Remaining lease obligation	26.3
Accelerated depreciation	$ 15.8