Inventory (Activity Related to Inventory Obligations) (Details) - Other Inventory Sales - USD ($) $ in Millions |
9 Months Ended | |||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Inventory [Line Items] | ||||
| Total Inventory obligations, Beginning Balance | [1] | $ 2 | $ 7 | |
| Purchases | [1] | 153 | 94 | |
| Payments | [1] | (153) | (96) | |
| Total Inventory obligations, Ending Balance | [1] | $ 2 | $ 5 | |
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