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Derivatives Financial Instruments - Derivative Income Statement Location (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Derivative [Line Items]        
Derivative, Gain (Loss) on Derivative, Net $ 2 $ 1 $ (1) $ (16)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Net income Net income Net income Net income
Purchased product costs        
Derivative [Line Items]        
Realized gain (loss) $ (2) $ (3) $ (8) $ (10)
Unrealized Gain (Loss) on Derivatives and Commodity Contracts 4 0 7 (8)
Derivative, Gain (Loss) on Derivative, Net $ 2 $ (3) $ (1) $ (18)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Purchased product costs Purchased product costs Purchased product costs Purchased product costs
Product Sales        
Derivative [Line Items]        
Realized gain (loss) $ 0 $ 1 $ 0 $ 1
Unrealized Gain (Loss) on Derivatives and Commodity Contracts 0 3 0 1
Derivative, Gain (Loss) on Derivative, Net $ 0 $ 4 $ 0 $ 2
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Revenue from Contract with Customer, Excluding Assessed Tax - Third parties Revenue from Contract with Customer, Excluding Assessed Tax - Third parties Revenue from Contract with Customer, Excluding Assessed Tax - Third parties Revenue from Contract with Customer, Excluding Assessed Tax - Third parties