Reserves for Discounts and Allowances (Details) $ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($)
Analysis of the amount of, and change in, reserves
Balance as of December 31, 2015	$ 662.7
Current provisions relating to sales in current year	1,258.2
Adjustments relating to prior years	(6.3)
Payments/credits relating to sales in current year	(816.0)
Payments/credits relating to sales in prior years	(446.8)
Balance as of June 30, 2016	651.8
Discounts
Analysis of the amount of, and change in, reserves
Balance as of December 31, 2015	56.1
Current provisions relating to sales in current year	266.8
Adjustments relating to prior years	(2.4)
Payments/credits relating to sales in current year	(210.2)
Payments/credits relating to sales in prior years	(51.5)
Balance as of June 30, 2016	58.8
Contractual Adjustments
Analysis of the amount of, and change in, reserves
Balance as of December 31, 2015	548.7
Current provisions relating to sales in current year	973.8
Adjustments relating to prior years	1.6
Payments/credits relating to sales in current year	(605.1)
Payments/credits relating to sales in prior years	(384.9)
Balance as of June 30, 2016	534.1
Returns
Analysis of the amount of, and change in, reserves
Balance as of December 31, 2015	57.9
Current provisions relating to sales in current year	17.6
Adjustments relating to prior years	(5.5)
Payments/credits relating to sales in current year	(0.7)
Payments/credits relating to sales in prior years	(10.4)
Balance as of June 30, 2016	$ 58.9