Revenue Recognition (Details) (USD $) In Millions	6 Months Ended
	Jun. 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	228.6
Adjustments relating to prior years	(8.4)
Payments/returns applied against product revenue reserves relating to current year	(135.0)
Payments/returns relating to sales in prior year	(76.4)
Period balance related to product revenue reserves	150.8
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	47.2
Payments/returns applied against product revenue reserves relating to current year	(33.3)
Payments/returns relating to sales in prior year	(13.0)
Period balance related to product revenue reserves	14.8
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	174.6
Adjustments relating to prior years	(8.4)
Payments/returns applied against product revenue reserves relating to current year	(101.4)
Payments/returns relating to sales in prior year	(58.5)
Period balance related to product revenue reserves	113.3
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	6.8
Payments/returns applied against product revenue reserves relating to current year	(0.3)
Payments/returns relating to sales in prior year	(4.9)
Period balance related to product revenue reserves	$ 22.7