Acquisitions and Other Transactions (Purchase Price Allocations) (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024	Mar. 15, 2024
Business Combination [Line Items]
Goodwill	$ 6,748.3	$ 9,133.3
Idorsia Pharmaceuticals Ltd.
Business Combination [Line Items]
Current assets (excluding inventories and net of cash acquired)			$ 2.1
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, In Process Research And Development			675.0
Goodwill			19.5
Total assets acquired			696.6
Current liabilities			(1.6)
Payments to Acquire Businesses, Net of Cash Acquired			$ 695.0