Product Sales - Schedule of Sales Related Deductions Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	$ 91.4	$ 85.3	$ 45.8
Provisions	727.9	478.9	408.3
Credits/payments	(663.2)	(472.8)	(368.8)
Ending Balance	156.1	91.4	85.3
Rebates, Chargebacks, and Discounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	41.1	29.9	12.7
Provisions	423.2	223.4	167.8
Credits/payments	(384.0)	(212.2)	(150.6)
Ending Balance	80.3	41.1	29.9
Distribution- Related Fees
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	42.0	34.1	29.5
Provisions	242.9	211.0	194.1
Credits/payments	(238.5)	(203.1)	(189.5)
Ending Balance	46.4	42.0	34.1
Other Sales- Related Deductions
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	8.3	21.3	3.6
Provisions	61.8	44.5	46.4
Credits/payments	(40.7)	(57.5)	(28.7)
Ending Balance	$ 29.4	$ 8.3	$ 21.3