Quarterly report [Sections 13 or 15(d)]

Derivative Instruments - Fair Value of Derivative Assets and Liabilities (Details)

v3.26.1
Derivative Instruments - Fair Value of Derivative Assets and Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Assets (Liabilities), at Fair Value, Net [1] $ (112) $ (523)
Normal Purchase Normal Sale Designated    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Assets (Liabilities), at Fair Value, Net   (394)
Fair Value, Inputs, Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Assets (Liabilities), at Fair Value, Net [1] 0 0
Fair Value, Inputs, Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Assets (Liabilities), at Fair Value, Net [1] (6) (23)
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Assets (Liabilities), at Fair Value, Net [1] $ (106) $ (500)
[1] As described in Note 1—Nature of Operations and Basis of Presentation, in June 2026, we designated the NPNS scope exception for our IPM agreements, which resulted in these agreements being no longer accounted for as derivative instruments as of the designation date. The fair value of such agreements was a liability of $394 million as of December 31, 2025.