Revenue Recognition and Accounts Receivable (Accounts Receivable, Net) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Revenue Recognition And Accounts Receivable [Line Items]
Trade receivables, net	$ 2,856.4		$ 2,856.4		$ 2,823.8
Other receivables	861.0		861.0		876.6
Accounts receivable, net	3,717.4		3,717.4		3,700.4
Transfers of Financial Assets Accounted for as Sale, Initial Fair Value of Assets Obtained as Proceeds	357.0		357.0		415.7
Sales Revenue, Goods, Net	3,738.0	$ 3,933.9	11,177.4	$ 11,562.5
Gross sales	6,336.0	6,497.2	18,894.5	19,289.2
Chargebacks	(1,283.9)	(1,348.3)	(3,810.7)	(4,073.2)
Accrued Sales Allowances	(1,042.7)	(952.7)	(3,131.5)	(2,905.9)
Revenue from Contract with Customer, Returns	(90.3)	(55.7)	(220.7)	(174.4)
Medicaid and other governmental rebates	(181.1)	(206.6)	(554.2)	(573.2)
Sales Revenue, Gross to net adjustments	(2,598.0)	$ (2,563.3)	(7,717.1)	$ (7,726.7)
Variable Consideration
Revenue Recognition And Accounts Receivable [Line Items]
Trade receivables, net	1,564.7		1,564.7		1,483.6
Other receivables	1,031.6		1,031.6		996.3
Accounts receivable, net	$ 2,596.3		$ 2,596.3		$ 2,479.9