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Debt and Borrowing Arrangements - Debt Repayments (Details) - Notes Payable
$ in Millions, $ in Millions
3 Months Ended
Mar. 31, 2025
CAD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
3.250% Notes Due March 2025      
Debt Instrument [Line Items]      
Interest Rate 3.25% 3.25%  
Debt repayments $ 600 $ 417  
2.125% Notes Due March 2024      
Debt Instrument [Line Items]      
Interest Rate     2.125%
Debt repayments     $ 500