v3.25.4
Financial Instruments - Cross Currency Risk Exposures Interest Rate Swaps (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
 [1]
Dec. 31, 2024
Disclosure of detailed information about hedges [Line Items]    
Borrowings before currency hedging arrangements $ 2,123 $ 2,820
Borrowings after currency hedging arrangements 2,123 2,841 [2]
Canada, Dollars [member]    
Disclosure of detailed information about hedges [Line Items]    
Borrowings before currency hedging arrangements 0 973
Borrowings after currency hedging arrangements 0 0 [2]
United States of America, Dollars [member]    
Disclosure of detailed information about hedges [Line Items]    
Borrowings before currency hedging arrangements 2,123 1,847
Borrowings after currency hedging arrangements $ 2,123 $ 2,841 [2]
[1] Includes fair value adjustments of $14 million associated with the interest related fair value component of hedging instruments.
[2] Includes fair value adjustments of $5 million associated with the interest related fair value component of hedging instruments.