Inventory (Activity Related to Inventory Obligations) (Details) - Other Inventory Sales - USD ($) $ in Millions |
3 Months Ended | |||
|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Inventory [Line Items] | ||||
| Total Inventory obligations, Beginning Balance | [1] | $ 2 | $ 7 | |
| Purchases | [1] | 93 | 22 | |
| Payments | [1] | (94) | (22) | |
| Total Inventory obligations, Ending Balance | [1] | $ 1 | $ 7 | |
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