v3.25.4
Supplementary Cash Flow Information - Cash and cash equivalents (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Unrestricted cash and cash equivalents included in the consolidated statement of cash flows      
Cash $ 2,381.0 $ 2,612.5  
Cash equivalents 3,861.8 3,500.0  
Total cash and cash equivalents 6,242.8 6,112.5 $ 5,121.4
Restricted cash and cash equivalents      
Restricted cash 344.7 1,155.1  
Restricted cash equivalents 300.0 245.0  
Total restricted cash and restricted cash equivalents 644.7 1,400.1  
Cash and cash equivalents included on the consolidated balance sheet      
Cash and restricted cash 2,725.7 3,767.6  
Cash equivalents and restricted cash equivalents 4,161.8 3,745.0  
Total cash and cash equivalents and restricted cash and restricted cash equivalents 6,887.5 7,512.6  
Blizzard Vacatia      
Disclosure of financial assets [line items]      
Restricted cash held for purchase of associate   835.0  
Holding company cash and investments      
Unrestricted cash and cash equivalents included in the consolidated statement of cash flows      
Cash 89.1 146.2  
Cash equivalents 108.1 362.0  
Total cash and cash equivalents 197.2 508.2  
Restricted cash and cash equivalents      
Restricted cash   155.0  
Total restricted cash and restricted cash equivalents   155.0  
Cash and cash equivalents included on the consolidated balance sheet      
Cash and restricted cash 89.1 301.2  
Cash equivalents and restricted cash equivalents 108.1 362.0  
Total cash and cash equivalents and restricted cash and restricted cash equivalents 197.2 663.2  
Holding company assets pledged for derivative obligations      
Unrestricted cash and cash equivalents included in the consolidated statement of cash flows      
Cash equivalents   101.1  
Total cash and cash equivalents   101.1  
Cash and cash equivalents included on the consolidated balance sheet      
Cash equivalents and restricted cash equivalents   101.1  
Total cash and cash equivalents and restricted cash and restricted cash equivalents   101.1  
Subsidiary cash and short term investments      
Unrestricted cash and cash equivalents included in the consolidated statement of cash flows      
Cash 2,265.1 2,411.2  
Cash equivalents 3,658.2 3,010.2  
Total cash and cash equivalents 5,923.3 5,421.4  
Restricted cash and cash equivalents      
Restricted cash 344.6 1,000.1  
Restricted cash equivalents 295.8 240.6  
Total restricted cash and restricted cash equivalents 640.4 1,240.7  
Cash and cash equivalents included on the consolidated balance sheet      
Cash and restricted cash 2,609.7 3,411.3  
Cash equivalents and restricted cash equivalents 3,954.0 3,250.8  
Total cash and cash equivalents and restricted cash and restricted cash equivalents 6,563.7 6,662.1  
Fairfax India      
Unrestricted cash and cash equivalents included in the consolidated statement of cash flows      
Cash 17.4 55.1  
Cash equivalents 0.4 26.7  
Total cash and cash equivalents 17.8 81.8  
Restricted cash and cash equivalents      
Restricted cash equivalents 4.2 4.4  
Total restricted cash and restricted cash equivalents 4.2 4.4  
Cash and cash equivalents included on the consolidated balance sheet      
Cash and restricted cash 17.4 55.1  
Cash equivalents and restricted cash equivalents 4.6 31.1  
Total cash and cash equivalents and restricted cash and restricted cash equivalents 22.0 $ 86.2  
Assets held for sale (note 21)      
Unrestricted cash and cash equivalents included in the consolidated statement of cash flows      
Cash 9.4    
Cash equivalents 95.1    
Total cash and cash equivalents 104.5    
Restricted cash and cash equivalents      
Restricted cash 0.1    
Total restricted cash and restricted cash equivalents 0.1    
Cash and cash equivalents included on the consolidated balance sheet      
Cash and restricted cash 9.5    
Cash equivalents and restricted cash equivalents 95.1    
Total cash and cash equivalents and restricted cash and restricted cash equivalents $ 104.6