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Organization and Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Percentage of Total Revenues and Accounts Receivable by Customer
The following table sets forth the percentages of total revenue or gross accounts receivable for customers that represent 10% or more of the respective amounts for the periods shown:
Revenue**Gross Accounts Receivable

Twelve Months Ended
December 31,
As of December 31,
20232022202120232022
Customer A35 %32 %28 %20 %19 %
Customer B*11 %12 %*10 %
Customer C30 %26 %21 %23 %17 %
Customer D37 %29 %18 %27 %22 %
Customer E*10 %***
* Less than 10%
** Total revenue for each customer is net of fees, cash discounts, and rebates directly allocable to that customer. Rebates paid to other entities are excluded; therefore, the combined value may exceed 100%.
Schedule of Basic and Diluted Net Income (Loss) Per Share
The following table sets forth the computation of basic and diluted net income per share for the periods shown:
Twelve Months Ended
December 31,
202320222021
(In millions, except per share data)
Net income$541.5 $341.2 $216.9 
Add back interest expense, net of tax attributable to assumed conversion of senior convertible notes12.6 11.0 11.4 
Net income - diluted$554.1 $352.2 $228.3 
Net income per common share
Basic$1.40 $0.88 $0.56 
Diluted$1.30 $0.82 $0.53 
Basic weighted average shares outstanding386.0 389.4 386.9 
Dilutive potential common stock outstanding:
Collaborative sales-based milestones
0.7 — — 
Restricted stock units and performance stock units1.1 1.0 2.1 
Senior convertible notes26.2 26.9 28.3 
Warrants11.5 10.2 11.5 
Diluted weighted average shares outstanding425.5 427.5 428.8 
Schedule of Outstanding Anti-Dilutive Securities Excluded in Diluted Net Income per Share
Outstanding anti-dilutive securities not included in the diluted net income per share attributable to common stockholders calculations were as follows:
Twelve Months Ended
December 31,
(In millions)
202320222021
Restricted stock units and performance stock units
— 0.4 —