v3.25.4
Capital - Additional Information (Detail)
 1 Months Ended 7 Months Ended 12 Months Ended
Feb. 28, 2026
USD ($)
shares
Oct. 31, 2025
USD ($)
shares
May 31, 2024
USD ($)
shares
Dec. 31, 2025
USD ($)
shares
Dec. 31, 2024
USD ($)
shares
Dec. 31, 2025
$ / shares
Disclosure Of Share Capital [Line Items]            
Number of common shares redeemed       6,000,000 4,100,000  
Excise taxes payable | $       $ 16,000,000    
Redemption price of shares | $ / shares           $ 25
Share repurchases | $       $ 1,000,000,000 $ 639,000,000  
Series ii cumulative redeemable preference share capital [Member]            
Disclosure Of Share Capital [Line Items]            
Number of shares authorized       6,000,000 6,000,000  
Dividend payable rate percentage       70.00%    
NCIB [member]            
Disclosure Of Share Capital [Line Items]            
Number of common shares redeemed   6,000,000   6,000,000    
Common shares repurchased, maximum value | $   $ 1,000,000,000        
NCIB [member] | Share Repurchases Transactions [Member]            
Disclosure Of Share Capital [Line Items]            
Common shares repurchased, maximum value | $ $ 600,000,000          
Potential repurchase of common shares 16,000,000          
Share Repurchase Program [Member]            
Disclosure Of Share Capital [Line Items]            
Number of common shares redeemed     4,100,000      
Repurchased common shares     6,700,000      
Share repurchases | $     $ 1,000,000,000