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Share Capital and Warrants - Schedule of Paid in Surplus Includes Stock Based Compensation Expense (Detail) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of reserves within equity [line items]    
Beginning balance $ 2,002 $ 2,691
Stock-Based Compensation Expense 126 97
Purchase of Common Shares Under NCIB (966) (688)
Preferred Shares Redeemed (87)  
Common Shares Issued on Exercise of Stock Options (16) (12)
Ending balance 944 2,002
NSRs and NCIB    
Disclosure of reserves within equity [line items]    
Stock-Based Compensation Expense 11 11
Retained Earnings Prior to Ovintiv Split    
Disclosure of reserves within equity [line items]    
Beginning balance 1,707 2,395
Purchase of Common Shares Under NCIB (966) (688)
Preferred Shares Redeemed (87)  
Common Shares Issued on Exercise of Stock Options 0 0
Ending balance 654 1,707
Retained Earnings Prior to Ovintiv Split | NSRs and NCIB    
Disclosure of reserves within equity [line items]    
Stock-Based Compensation Expense 0 0
Stock-Based Compensation    
Disclosure of reserves within equity [line items]    
Beginning balance 295 296
Purchase of Common Shares Under NCIB 0 0
Preferred Shares Redeemed 0  
Common Shares Issued on Exercise of Stock Options (16) (12)
Ending balance 290 295
Stock-Based Compensation | NSRs and NCIB    
Disclosure of reserves within equity [line items]    
Stock-Based Compensation Expense $ 11 $ 11