Derivative Instruments and Hedging Activities (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Designated as hedging instruments | Foreign exchange contracts | Other income, net
Effect of derivative instruments on Consolidated Statements of Income
Gains (losses) related to ineffective portion of hedging relationships	$ 2.0	$ 4.4
Gains related to amounts excluded from assessment of hedge effectiveness	1.5	2.5
Designated as hedging instruments | Cash flow hedges
Effect of derivative instruments on Consolidated Statements of Income
Gains (losses) expected to be reclassified from accumulated OCI into operations in the next 12 months	16.0
Designated as hedging instruments | Cash flow hedges | Foreign exchange contracts
Effect of derivative instruments on Consolidated Statements of Income
Amount of Gain/(Loss) Recognized in OCI on Derivative (Effective Portion)	75.0	23.5
Designated as hedging instruments | Cash flow hedges | Foreign exchange contracts | Net product sales
Effect of derivative instruments on Consolidated Statements of Income
Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(6.4)	19.1
Designated as hedging instruments | Cash flow hedges | Foreign exchange contracts | Other income, net
Effect of derivative instruments on Consolidated Statements of Income
Amount of Gain/(Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded From Effectiveness Testing)	3.5	(1.9)
Designated as hedging instruments | Cash flow hedges | Treasury rate locks | Interest expense
Effect of derivative instruments on Consolidated Statements of Income
Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(0.8)
Designated as hedging instruments | Fair value hedges | Interest rate swap contracts | Interest expense
Effect of derivative instruments on Consolidated Statements of Income
Amount of Gain/(Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded From Effectiveness Testing)	6.9	1.8
Not designated as hedging instruments | Foreign exchange contracts | Other income, net
Effect of derivative instruments on Consolidated Statements of Income
Amount of Gain/(Loss) Recognized in OCI on Derivative (Effective Portion)	$ 38.7	$ (7.9)