v3.26.1
Income Taxes (Provision For Income Taxes) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Income Tax Disclosure [Line Items]    
Total Current Tax Expense (Recovery) $ 13 $ 43
Total Deferred Tax Expense (Recovery) (210) (77)
Income Tax Expense (Recovery) $ (197) $ (34)
Effective Tax Rate 23.80% 17.60%
United States [Member]    
Income Tax Disclosure [Line Items]    
Total Current Tax Expense (Recovery) $ 1 $ 11
Total Deferred Tax Expense (Recovery) (245) 96
Canada [Member]    
Income Tax Disclosure [Line Items]    
Total Current Tax Expense (Recovery) 12 32
Total Deferred Tax Expense (Recovery) $ 35 $ (173)