v3.26.1
Derivative Instruments and Hedging Activities - Schedule of Balance Sheet Locations And Related Fair Values Of Outstanding Derivative Instruments (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Derivative [Line Items]    
Gross Assets   $ 5
Gross Liabilities Offset in Balance Sheet   0
Net Assets Recognized in Balance Sheet $ 22 $ 5
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Prepayments and other Prepayments and other
Gross Liabilities   $ 44
Gross Assets Offset in Balance Sheet   0
Net Liabilities Recognized in Balance Sheet   $ 44
Net Liabilities Recognized in Balance Sheet $ (10)  
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Accrued Liabilities, Current Accrued Liabilities, Current
Derivatives designated as cash flow hedging instruments:    
Derivative [Line Items]    
Gross Assets $ 1  
Gross Liabilities Offset in Balance Sheet 0  
Net Assets Recognized in Balance Sheet 1  
Gross Liabilities 3  
Gross Assets Offset in Balance Sheet 0  
Net Liabilities Recognized in Balance Sheet 3  
Derivatives not designated as cash flow hedging instruments:    
Derivative [Line Items]    
Gross Assets 21  
Gross Liabilities Offset in Balance Sheet 0  
Net Assets Recognized in Balance Sheet 21  
Gross Liabilities 2  
Gross Assets Offset in Balance Sheet (15)  
Net Liabilities Recognized in Balance Sheet (13)  
WTI crude oil price swaps - long | Long | Derivatives designated as cash flow hedging instruments:    
Derivative [Line Items]    
Gross Assets 0  
Gross Liabilities Offset in Balance Sheet 0  
Net Assets Recognized in Balance Sheet 0  
Gross Liabilities 3  
Gross Assets Offset in Balance Sheet 0  
Net Liabilities Recognized in Balance Sheet 3  
Sub-octane gasoline and diesel price swaps - short | Short | Derivatives designated as cash flow hedging instruments:    
Derivative [Line Items]    
Gross Assets 1  
Gross Liabilities Offset in Balance Sheet 0  
Net Assets Recognized in Balance Sheet 1  
Gross Liabilities 0  
Gross Assets Offset in Balance Sheet 0  
Net Liabilities Recognized in Balance Sheet 0  
Commodity contracts | Long    
Derivative [Line Items]    
Gross Assets   $ 3
Gross Liabilities Offset in Balance Sheet   0
Net Assets Recognized in Balance Sheet   3
Gross Liabilities   2
Gross Assets Offset in Balance Sheet   0
Net Liabilities Recognized in Balance Sheet   2
Commodity contracts | Long | Derivatives not designated as cash flow hedging instruments:    
Derivative [Line Items]    
Gross Assets 3  
Gross Liabilities Offset in Balance Sheet 0  
Net Assets Recognized in Balance Sheet 3  
Gross Liabilities 0  
Gross Assets Offset in Balance Sheet 0  
Net Liabilities Recognized in Balance Sheet 0  
Commodity contracts | Short    
Derivative [Line Items]    
Gross Assets   2
Gross Liabilities Offset in Balance Sheet   0
Net Assets Recognized in Balance Sheet   2
Gross Liabilities   3
Gross Assets Offset in Balance Sheet   0
Net Liabilities Recognized in Balance Sheet   3
Commodity contracts | Short | Derivatives not designated as cash flow hedging instruments:    
Derivative [Line Items]    
Gross Assets 4  
Gross Liabilities Offset in Balance Sheet 0  
Net Assets Recognized in Balance Sheet 4  
Gross Liabilities 2  
Gross Assets Offset in Balance Sheet 0  
Net Liabilities Recognized in Balance Sheet 2  
Foreign currency forward contracts    
Derivative [Line Items]    
Gross Assets   0
Gross Liabilities Offset in Balance Sheet   0
Net Assets Recognized in Balance Sheet   0
Gross Liabilities   6
Gross Assets Offset in Balance Sheet   0
Net Liabilities Recognized in Balance Sheet   6
Foreign currency forward contracts | Derivatives not designated as cash flow hedging instruments:    
Derivative [Line Items]    
Gross Assets 14  
Gross Liabilities Offset in Balance Sheet 0  
Net Assets Recognized in Balance Sheet 14  
Gross Liabilities 0  
Gross Assets Offset in Balance Sheet 0  
Net Liabilities Recognized in Balance Sheet 0  
Forward platinum contracts    
Derivative [Line Items]    
Gross Assets   0
Gross Liabilities Offset in Balance Sheet   0
Net Assets Recognized in Balance Sheet   0
Gross Liabilities   33
Gross Assets Offset in Balance Sheet   0
Net Liabilities Recognized in Balance Sheet   $ 33
Forward platinum contracts | Derivatives not designated as cash flow hedging instruments:    
Derivative [Line Items]    
Gross Assets 0  
Gross Liabilities Offset in Balance Sheet 0  
Net Assets Recognized in Balance Sheet 0  
Gross Liabilities 0  
Gross Assets Offset in Balance Sheet (15)  
Net Liabilities Recognized in Balance Sheet $ (15)