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Financial Instruments - Disclosure of changes in assets, level 3 fair value - investments held at fair value (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of financial assets [line items]      
Balance at beginning of period before allocation of associate loss to long-term interest $ 944,832    
Cash investment in associate 19,961 $ 0 $ 0
Balance at end of period before allocation of associate loss to long-term interest 575,738 944,832  
Investments held at fair value      
Disclosure of financial assets [line items]      
Balance at beginning of period before allocation of associate loss to long-term interest 493,888    
Balance at end of period before allocation of associate loss to long-term interest 251,892 493,888  
Level 3 of fair value hierarchy      
Disclosure of financial assets [line items]      
Balance at beginning of period before allocation of associate loss to long-term interest 254,653    
Balance at end of period before allocation of associate loss to long-term interest 29,094 254,653  
Level 3 of fair value hierarchy | Investments held at fair value      
Disclosure of financial assets [line items]      
Balance at beginning of period before allocation of associate loss to long-term interest 239,533 206,892 154,445
Gain/(Loss) on changes in fair value (31,253) 65,505 41,297
Reclassification of Akili to level 1 investment (128,764)    
Balance at end of period before allocation of associate loss to long-term interest 12,593 239,533 206,892
Balance at end of period after allocation of associate loss to long-term interest 12,593    
Level 3 of fair value hierarchy | Investments held at fair value | Gelesis      
Disclosure of financial assets [line items]      
Cash investment in associate     10,000
Gelesis Earn out shares received in SPAC exchange 14,214    
Exchange of Gelesis preferred shares to Gelesis common shares (92,303)    
Level 3 of fair value hierarchy | Investments held at fair value | Vor      
Disclosure of financial assets [line items]      
Cash investment in associate   500 $ 1,150
Reclassification of Vor from level 3 to level 1   $ (33,365)  
Level 3 of fair value hierarchy | Investments held at fair value | Sonde      
Disclosure of financial assets [line items]      
Deconsolidation $ 11,168