v3.22.4
Financial Instruments (Foreign Exchange Forward Contracts) (Details) - Foreign Exchange Forward [Member]
$ in Millions, $ in Millions
12 Months Ended
Dec. 31, 2022
CAD ($)
Dec. 31, 2021
CAD ($)
Dec. 31, 2020
CAD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Foreign Currency Derivatives [Abstract]          
Notional amount       $ 1,311 $ 910
Weighted-average exchange rate       1.33 1.27
Weighted average term 157 days 251 days      
Gain on derivative instruments, net, pretax $ 129        
Loss on derivative instruments, net, pretax   $ 18 $ 3    
Minimum [Member]          
Foreign Currency Derivatives [Abstract]          
Exchange rates       1.29 1.25
Derivative term 29 days 112 days      
Maximum [Member]          
Foreign Currency Derivatives [Abstract]          
Exchange rates       1.37 1.28
Derivative term 300 days 352 days      
Other Current Assets [Member]          
Foreign Currency Derivatives [Abstract]          
Fair value of outstanding foreign exchange forward contracts $ 33 $ 0      
Accounts Payable and Other [Member]          
Foreign Currency Derivatives [Abstract]          
Fair value of outstanding foreign exchange forward contracts $ 4 $ 2