v3.25.4
Investments (Details)
$ in Millions, $ in Millions
12 Months Ended
Sep. 18, 2025
USD ($)
Sep. 18, 2025
CAD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Investments        
Investments     $ 1,141.3 $ 325.5
Unrealized gains (loss) on available-for-sale investments        
Net gain on changes in the fair value of equity investments at FVTOCI     802.3 46.6
Income tax expense in other comprehensive (loss) income     106.0 6.2
Net gain on changes in the fair value of equity investments at FVTOCI     696.3 40.4
Equity investments        
Investments        
Investments     1,105.3 324.8
Cost of equity investments disposed of     40.0  
Gross proceeds from disposal     127.1  
Gains on sale of investments     75.0  
Discovery        
Investments        
Gross proceeds from disposal $ 84.4 $ 116.5    
Warrants        
Investments        
Investments     $ 36.0 $ 0.7