Product Sales - Schedule of Sales Related Deductions Activity (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	$ 91.4	$ 85.3
Provisions	332.4	219.7
Credits/payments	(258.3)	(214.0)
Ending Balance	165.5	91.0
Rebates, Chargebacks, and Discounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	41.1	29.9
Provisions	185.1	97.7
Credits/payments	(139.5)	(91.1)
Ending Balance	86.7	36.5
Distribution- Related Fees
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	42.0	34.1
Provisions	114.0	102.1
Credits/payments	(87.9)	(98.5)
Ending Balance	68.1	37.7
Other Sales- Related Deductions
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	8.3	21.3
Provisions	33.3	19.9
Credits/payments	(30.9)	(24.4)
Ending Balance	$ 10.7	$ 16.8