Commitments and Contingencies (Commitments and Loss Contingency) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Legal and other proceedings
Provisions for litigation loss, insurance claims and other disputes	$ 76.5	$ 36.9
Clinical Testing
Commitment [Line Items]
Commitment amount	399.7	358.6
Contract Manufacturing
Commitment [Line Items]
Commitment amount	101.3	86.4
Commitments expected to be paid in next year	76.3
Other Purchasing Commitment
Commitment [Line Items]
Commitment amount	225.9	190.1
Commitments expected to be paid in next year	218.9
Investment Commitment
Commitment [Line Items]
Commitment amount	7.3	9.4
Capital Commitment
Commitment [Line Items]
Commitment amount	$ 14.1	$ 25.4