Revenue Recognition and Accounts Receivable Variable Consideration (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Gross sales	$ 7,567.0	$ 4,424.0
Chargebacks	(1,318.0)	(854.4)
Rebates, promotional programs and other sales allowances	(1,568.5)	(845.6)
Returns	(113.0)	(59.0)
Medicaid and other governmental rebates	(167.4)	(76.8)
Sales Revenue, Gross to net adjustments	(3,166.9)	(1,835.8)
Net sales	$ 4,400.1	$ 2,588.2