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Equity - Narrative (Details) - Common
$ in Millions
 12 Months Ended
Dec. 31, 2022
shares
Dec. 31, 2021
shares
May 09, 2022
USD ($)
tranch
Jun. 18, 2015
shares
Equity - Acquired Share capital PureTech LLC [Line Items]        
Value of ahares authorized to be repurchased | $     $ 50.0  
Number of tranches | tranch     2  
Number of shares issued (in shares) 278,566,306      
Purchase of treasury stock (in shares) 10,595,347 0    
Jefferies International Limited        
Equity - Acquired Share capital PureTech LLC [Line Items]        
Value of ahares authorized to be repurchased | $     $ 25.0  
PureTech Health LLC        
Equity - Acquired Share capital PureTech LLC [Line Items]        
Issued share capital acquired (in shares)       159,648,387