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Related Party Transactions (Tables)
 9 Months Ended
Sep. 30, 2023
Related Party Transactions [Abstract]  
Expenses related to Related Party which were Settled in Cash
The following is the summary of expenses related to the Paragon Agreement, which were ultimately settled in cash (in millions):
Three Months Ended
September 30,		Nine Months Ended
September 30,		Financial Statement Line Item
2023202220232022
Reimbursable costs under the Paragon Agreement$16.7 $— $17.9 $— Research and development
Related Party Accounts Payable
The following is the summary of Related party accounts payable (in millions):
September 30,
2023		December 31,
2022
Reimbursable costs under the Paragon Agreement$16.8 $— 
Parapyre Option Obligation liability3.0 — 
Total related party accounts payable$19.8 $—