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Acquisitions and Divestitures (Assets Acquired and Liabilities Assumed) (Details) - USD ($)
$ in Millions
1 Months Ended
Dec. 01, 2022
Dec. 31, 2022
Mar. 31, 2023
Business Acquisition [Line Items]      
Goodwill   $ 4,073.0 $ 4,073.1
Akouos Acquisition      
Business Acquisition [Line Items]      
Cash $ 153.2    
Acquired IPR&D 184.0    
Goodwill 181.2    
Other assets and liabilities, net 28.9    
Acquisition date fair value of consideration transferred 547.3    
Cash acquired (153.2)    
Fair value of CVR liability $ (66.9)    
Cash paid, net of cash acquired   $ 327.2