v3.25.4
Income Taxes - Additional Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Tax Credit Carryforward [Line Items]      
Non-capital taxes losses and undeducted research and development expense $ 5,000,000 $ 5,000,000 $ 343,000,000
Tax credit carryforwards 0 26,000,000 94,000,000
Provision for income taxes 278,000,000 209,000,000 53,000,000
Interest accrued related to uncertain tax positions 1,000,000 0 $ 0
Tax loss carryforwards 578,000,000 608,000,000  
United States      
Tax Credit Carryforward [Line Items]      
Tax loss carryforwards 287,000,000 306,000,000  
Non-capital tax losses, no expiration 253,000,000 272,000,000  
Non-capital tax losses 34,000,000 34,000,000  
Capital losses 1,600,000,000 1,700,000,000  
CANADA      
Tax Credit Carryforward [Line Items]      
Capital losses 760,000,000 761,000,000  
State      
Tax Credit Carryforward [Line Items]      
Non-capital tax losses 348,000,000 339,000,000  
Non-capital tax losses, no expiration 5,000,000 6,000,000  
Non-capital tax losses $ 343,000,000 $ 333,000,000