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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, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of reserves within equity [line items]      
Beginning Balance $ 4,284 $ 4,391  
Stock-Based Compensation Expense 373 159 $ 49
Purchase of Common Shares Under NCIBs (1,571) (120)  
Common Shares Issued on Exercise of Stock Options (32) (1)  
Ending Balance 2,691 4,284 4,391
NSRs and NCIB      
Disclosure of reserves within equity [line items]      
Stock-Based Compensation Expense 10 14  
Retained Earnings Prior to Ovintiv Split      
Disclosure of reserves within equity [line items]      
Beginning Balance 4,086 4,086  
Purchase of Common Shares Under NCIBs 0 0  
Common Shares Issued on Exercise of Stock Options 0 0  
Ending Balance 4,086 4,086 4,086
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 318 305  
Purchase of Common Shares Under NCIBs 0 0  
Common Shares Issued on Exercise of Stock Options (32) (1)  
Ending Balance 296 318 305
Stock-Based Compensation | NSRs and NCIB      
Disclosure of reserves within equity [line items]      
Stock-Based Compensation Expense 10 14  
Common shares      
Disclosure of reserves within equity [line items]      
Beginning Balance 120 0  
Purchase of Common Shares Under NCIBs (1,571) (120)  
Common Shares Issued on Exercise of Stock Options 0 0  
Ending Balance 1,691 120 $ 0
Common shares | NSRs and NCIB      
Disclosure of reserves within equity [line items]      
Stock-Based Compensation Expense $ 0 $ 0