Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Payables and Accruals [Abstract]
Accrued payroll and related costs	$ 773.0	$ 640.9
Accrued clinical expenses	357.2	315.7
Accrued sales-related costs	875.6	786.2
Income tax-related costs	351.3	213.2
Other accrued expenses and liabilities	519.3	571.1
Accrued expenses and other current liabilities	$ 2,876.4	$ 2,527.1