Revenue Recognition (Details) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011
Analysis of the amount of, and change in, product revenue reserves
Period balance related to product revenue reserves	$ 142.0
Current provisions relating to sales in current year	350.1
Adjustments relating to prior years	(10.1)
Payments/returns applied against product revenue reserves relating to current year	(236.0)
Payments/returns relating to sales in prior year	(86.5)
Period balance related to product revenue reserves	159.5
Discounts [Member]
Analysis of the amount of, and change in, product revenue reserves
Period balance related to product revenue reserves	13.9
Current provisions relating to sales in current year	71.7
Payments/returns applied against product revenue reserves relating to current year	(57.4)
Payments/returns relating to sales in prior year	(12.3)
Period balance related to product revenue reserves	15.9
Contractual Adjustments [Member]
Analysis of the amount of, and change in, product revenue reserves
Period balance related to product revenue reserves	107.0
Current provisions relating to sales in current year	267.4
Adjustments relating to prior years	(9.4)
Payments/returns applied against product revenue reserves relating to current year	(178.3)
Payments/returns relating to sales in prior year	(65.3)
Period balance related to product revenue reserves	121.4
Returns [Member]
Analysis of the amount of, and change in, product revenue reserves
Period balance related to product revenue reserves	21.1
Current provisions relating to sales in current year	11.0
Adjustments relating to prior years	(0.7)
Payments/returns applied against product revenue reserves relating to current year	(0.3)
Payments/returns relating to sales in prior year	(8.9)
Period balance related to product revenue reserves	$ 22.2