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Contingent Payments - Additional Information (Detail) - Sunrise Oil Sands Partnership
$ in Millions
 9 Months Ended
Sep. 30, 2023
CAD ($)
Aug. 31, 2022
CAD ($)
$ / bbl
Disclosure of contingent liabilities in business combination [line items]    
Contingent consideration maximum payment $ 301.0 $ 600.0
Contingent consideration, price per barrel (in dollars per barrel) | $ / bbl   52.00
Contingent consideration, quarterly payment   $ 2.8
Liabilities Settled or Payable 207.0  
Major business combination    
Disclosure of contingent liabilities in business combination [line items]    
Liabilities Settled or Payable $ 207.0  
Maximum    
Disclosure of contingent liabilities in business combination [line items]    
Contingent consideration, price per barrel (in dollars per barrel) | $ / bbl   53.00