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Inventories - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Inventory [Line Items] |  |  |  |
777X and 767 reach-forward losses |  | $ 5,140 | $ 3,006 |
Early Issue Sales Consideration |  |  |  |
Inventory [Line Items] |  |  |  |
Inventory subject to uncertainty | $ 6,070 | 6,070 |  | $ 5,837
Airplane Program 737 |  |  |  |
Inventory [Line Items] |  |  |  |
Amount of deferred costs related to commercial aircraft programs | 11,082 | 11,082 |  | 9,679
Unamortized tooling and other non-recurring costs | 828 | 828 |  | 909
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders at the balance sheet date | 11,871 | 11,871 |  |
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders | 39 | 39 |  |
Airplane Program 777x |  |  |  |
Inventory [Line Items] |  |  |  |
Amount of deferred costs related to commercial aircraft programs | 0 | 0 |  | 0
Unamortized tooling and other non-recurring costs | 1,486 | 1,486 |  | 4,122
Inventory, work in process | 3,697 | 3,697 |  | 3,476
777X and 767 reach-forward losses | 4,899 |  |  |
Airplane Program 787 |  |  |  |
Inventory [Line Items] |  |  |  |
Amount of deferred costs related to commercial aircraft programs | 14,088 | 14,088 |  | 13,178
Unamortized tooling and other non-recurring costs | 1,246 | 1,246 |  | 1,370
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders at the balance sheet date | 12,597 | 12,597 |  |
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders | 2,737 | 2,737 |  |
Supplier advances | $ 1,100 | 1,100 |  | $ 1,379
Abnormal production costs |  | $ 30 | $ 209 |

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