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Significant Accounting Policies (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2023
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Percentage of LIFO inventory |  |  |  |  |  | 23.00%
Reduction of cost of revenue | $ 1,112 | $ 1,052 |  | $ 3,131 | $ 3,233 |
Unallocated |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Reduction of cost of revenue | $ (26) | $ (25) |  | $ (94) | 58 |
Inventory Valuation and Obsolescence |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
LIFO provision expense (income) |  |  |  |  |  | $ 6
Change in Accounting Method Accounted for as Change in Estimate | Unallocated |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Reduction of cost of revenue |  |  | $ 117 |  | $ 117 |

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