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Segment Information (Tables)
3 Months Ended
Mar. 31, 2025
Segment Reporting [Abstract]  
Schedule of Significant Expenses
In addition to the significant expense categories included within consolidated net income presented on the Company's Condensed Consolidated Statements of Operations, see below for disaggregated amounts that comprise research and development expenses:
Three Months Ended
March 31,
(In millions)20252024
Direct research and development expenses(a)
$388.4 $408.3 
Indirect research and development expenses:
Payroll and benefits451.6 418.9 
Lab supplies and other research and development costs
60.0 55.9 
Occupancy and other operating costs154.4 134.6 
Total indirect research and development expenses
666.0 609.4 
Clinical manufacturing costs
310.3 274.5 
Reimbursement of research and development expenses by collaborators(37.3)(43.8)
Total research and development expenses
$1,327.4 $1,248.4 
(a) Direct research and development expenses are comprised primarily of costs paid to third parties for clinical and product development activities, and the portion of research and development expenses incurred by our collaborators that we are obligated to reimburse