Property, Plant and Equipment, Net (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Jun. 30, 2010 Lexington
Property, Plant and Equipment, Net
Land and buildings	$ 708.0	$ 689.9
Office furniture, fittings and equipment	338.1	304.9
Warehouse, laboratory and manufacturing equipment	271.9	119.4
Assets under construction	81.7	167.7
Property, plant and equipment, gross	1,399.7	1,281.9
Less: Accumulated depreciation	(467.6)	(428.5)
Property, plant and equipment, net	932.1	853.4
Depreciation	128.1	119.2	105.0
Significant Acquisitions and Disposals [Line Items]
Cash purchase price				165.0
Acquisition cost allocation, land				72.1
Acquisition cost allocation, building				49.8
Acquisition cost allocation, property, plant and equipment, total				121.9
Acquisition cost allocation, extinguishment of debt				$ 43.1