Intangible Assets and Goodwill - Changes in Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Goodwill [Roll Forward]
Goodwill, January 1	$ 6,478.9	$ 6,219.2
Other(3)	7.7	(1.5)
Goodwill, December 31	6,491.1	6,478.9
Hi-Bio Acquisition
Goodwill [Roll Forward]
Goodwill, resulting from acquisition	4.5	256.5
Reata Pharmaceuticals, Inc
Goodwill [Roll Forward]
Goodwill, resulting from acquisition	0.0	$ 4.7
Goodwill, December 31	$ 469.2