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Fair Value Measurement - Net Fair Value of Financial Instruments (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Financial assets    
Investment in CVE common shares $ 0 $ 1,117
Carrying Amount    
Financial assets    
Investment in CVE common shares 0 1,117
Commodity derivatives 824 593
Investments in debt securities 1,222 479
Loans and advances—related parties 0 114
Financial liabilities    
Total debt, excluding finance leases 15,323 18,673
Carrying Amount | Commodity    
Financial liabilities    
Commodity derivatives 782 537
Fair Value    
Financial assets    
Investment in CVE common shares 0 1,117
Commodity derivatives 824 593
Investments in debt securities 1,222 479
Loans and advances—related parties 0 114
Financial liabilities    
Total debt, excluding finance leases 15,545 22,451
Fair Value | Commodity    
Financial liabilities    
Commodity derivatives $ 782 $ 537