Revenue Recognition and Accounts Receivable (Accounts Receivable, Net) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Revenue Recognition And Accounts Receivable [Line Items]
Trade receivables, net	$ 2,794.2		$ 2,794.2		$ 2,675.3
Other receivables	463.9		463.9		546.0
Accounts receivable, net	3,258.1		3,258.1		3,221.3
Trade receivables assigned and derecognized	15.4		15.4		29.9
Net sales	3,569.0	$ 3,785.9	6,812.2	$ 7,439.4
Gross sales	5,974.8	6,383.9	11,545.0	12,558.5
Chargebacks	(1,260.6)	(1,282.6)	(2,418.6)	(2,526.8)
Accrued Sales Allowances	(918.4)	(1,040.5)	(1,889.0)	(2,088.8)
Revenue from Contract with Customer, Returns	(47.8)	(70.1)	(102.1)	(130.4)
Medicaid and other governmental rebates	(179.0)	(204.8)	(323.1)	(373.1)
Sales Revenue, Gross to net adjustments	(2,405.8)	$ (2,598.0)	(4,732.8)	$ (5,119.1)
Variable Consideration
Revenue Recognition And Accounts Receivable [Line Items]
Trade receivables, net	1,417.8		1,417.8		1,547.0
Accounts receivable, net	$ 2,464.1		$ 2,464.1		$ 2,536.4