v3.26.1
Long-Term Debt (Narrative) (Details)
$ in Millions, $ in Billions
3 Months Ended 6 Months Ended
Apr. 20, 2026
USD ($)
Apr. 09, 2026
USD ($)
Feb. 03, 2026
USD ($)
Feb. 03, 2026
CAD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Nov. 25, 2025
USD ($)
Debt Instrument [Line Items]                    
Long-term debt current         $ 0   $ 0   $ 810  
Long-term debt carrying value         3,695   3,695   5,202  
Long-term debt, fair value         3,966   3,966   $ 5,510  
Aggregate cash payment for repurchased debt         $ 720 $ 600 $ 1,179 $ 600    
NuVista Energy Ltd [Member]                    
Debt Instrument [Line Items]                    
Cash paid for acquisition     $ 1,204 $ 1.6            
Two Year Term Credit Agreement [Member]                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity                   $ 1,200
5.65% Unsecured Notes [Member] | Unsecured Notes, Due May 15, 2028 [Member]                    
Debt Instrument [Line Items]                    
Debt instrument redeemed   $ 700                
Debt instrument interest rate stated percentage   5.65%                
Debt instrument maturity date   May 15, 2028                
Aggregate cash payment for repurchased debt $ 737                  
Accrued and unpaid interest 17                  
Debt instrument one time payment $ 20