Reserves for Discounts and Allowances (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Analysis of the amount of, and change in, reserves
Balance as of December 31, 2013	$ 416.3
Current provisions relating to sales in current year	1,182.4
Adjustments relating to prior years	(1.4)
Payments/credits relating to sales in current year	(805.3)
Payments/credits relating to sales in prior years	(343.3)
Balance as of September 30, 2014	448.7
Discounts
Analysis of the amount of, and change in, reserves
Balance as of December 31, 2013	47.0
Current provisions relating to sales in current year	247.8
Adjustments relating to prior years	(0.2)
Payments/credits relating to sales in current year	(200.1)
Payments/credits relating to sales in prior years	(45.3)
Balance as of September 30, 2014	49.2
Contractual Adjustments
Analysis of the amount of, and change in, reserves
Balance as of December 31, 2013	335.6
Current provisions relating to sales in current year	907.3
Adjustments relating to prior years	(16.6)
Payments/credits relating to sales in current year	(603.7)
Payments/credits relating to sales in prior years	(269.0)
Balance as of September 30, 2014	353.6
Returns
Analysis of the amount of, and change in, reserves
Balance as of December 31, 2013	33.7
Current provisions relating to sales in current year	27.3
Adjustments relating to prior years	15.4
Payments/credits relating to sales in current year	(1.5)
Payments/credits relating to sales in prior years	(29.0)
Balance as of September 30, 2014	$ 45.9