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Debt And Related Expenses (Schedule Of Debt Instruments and Balances) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Debt Instrument [Line Items]    
Long-term debt, gross $ 6,121  
Net premium on debentures and notes 64 $ 103
Debt issuance costs (30) (26)
Total debt 6,155 6,440
Less amount classified as short-term debt 483 251
Long-term debt 5,672 6,189
8.25% due August 1, 2023 [Member]    
Debt Instrument [Line Items]    
Long-term debt, gross [1] $ 0 $ 242
Debt, maturity date Aug. 01, 2023  
Debt interest rate, stated percentage 8.25% 8.25%
5.25% due September 15, 2024 [Member]    
Debt Instrument [Line Items]    
Long-term debt, gross [1] $ 472 $ 472
Debt, maturity date Sep. 15, 2024  
Debt interest rate, stated percentage 5.25% 5.25%
5.85% due December 15, 2025 [Member]    
Debt Instrument [Line Items]    
Long-term debt, gross $ 485 $ 485
Debt, maturity date Dec. 15, 2025  
Debt interest rate, stated percentage 5.85% 5.85%
7.50% due September 15, 2027 [Member]    
Debt Instrument [Line Items]    
Long-term debt, gross [2] $ 73 $ 73
Debt, maturity date Sep. 15, 2027  
Debt interest rate, stated percentage 7.50% 7.50%
5.25% due October 15, 2027 [Member]    
Debt Instrument [Line Items]    
Long-term debt, gross [1] $ 390 $ 390
Debt, maturity date Oct. 15, 2027  
Debt interest rate, stated percentage 5.25% 5.25%
5.875% due June 15, 2028 [Member]    
Debt Instrument [Line Items]    
Long-term debt, gross [1] $ 325 $ 325
Debt, maturity date Jun. 15, 2028  
Debt interest rate, stated percentage 5.875% 5.875%
4.50% due January 15, 2030 [Member]    
Debt Instrument [Line Items]    
Long-term debt, gross [1] $ 585 $ 585
Debt, maturity date Jan. 15, 2030  
Debt interest rate, stated percentage 4.50% 4.50%
7.875% due September 30, 2031 [Member]    
Debt Instrument [Line Items]    
Long-term debt, gross $ 675 $ 675
Debt, maturity date Sep. 30, 2031  
Debt interest rate, stated percentage 7.875% 7.875%
7.95% due April 15, 2032 [Member]    
Debt Instrument [Line Items]    
Long-term debt, gross $ 366 $ 366
Debt, maturity date Apr. 15, 2032  
Debt interest rate, stated percentage 7.95% 7.95%
5.60% due July 15, 2041 [Member]    
Debt Instrument [Line Items]    
Long-term debt, gross $ 1,250 $ 1,250
Debt, maturity date Jul. 15, 2041  
Debt interest rate, stated percentage 5.60% 5.60%
4.75% due May 15, 2042 [Member]    
Debt Instrument [Line Items]    
Long-term debt, gross $ 750 $ 750
Debt, maturity date May 15, 2042  
Debt interest rate, stated percentage 4.75% 4.75%
5.00% due June 15, 2045 [Member]    
Debt Instrument [Line Items]    
Long-term debt, gross $ 750 $ 750
Debt, maturity date Jun. 15, 2045  
Debt interest rate, stated percentage 5.00% 5.00%
[1] These instruments were assumed by Devon in January 2021 in conjunction with the Merger. Approximately $35 million of these instruments remain the unsecured and unsubordinated obligation of WPX, a wholly-owned subsidiary of Devon.
[2] This instrument was assumed by Devon in April 2003 in conjunction with the merger with Ocean Energy. The fair value and effective rate of this note at the time assumed was $169 million and 6.5%, respectively. This instrument is the unsecured and unsubordinated obligation of Devon OEI Operating, L.L.C. and is guaranteed by Devon Energy Production Company, L.P. Each of these entities is a wholly-owned subsidiary of Devon.