Financial and Derivative Instruments - Schedule of Consolidated Balance Sheet: Fair Value of Derivatives (Details) - Commodity - USD ($) $ in Millions |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments | ||
| Total Assets at Fair Value | $ 24 | $ 264 |
| Total Liabilities at Fair Value | 49 | 68 |
| Accounts and notes receivable, net | ||
| Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments | ||
| Total Assets at Fair Value | 1 | 191 |
| Long-term receivables, net | ||
| Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments | ||
| Total Assets at Fair Value | 23 | 73 |
| Accounts payable | ||
| Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments | ||
| Total Liabilities at Fair Value | 44 | 60 |
| Deferred credits and other noncurrent obligations | ||
| Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments | ||
| Total Liabilities at Fair Value | $ 5 | $ 8 |