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Inventories (Details) - USD ($) $ in Millions | Jul. 04, 2021 | Dec. 31, 2020
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Inventory Disclosure [Abstract] |  |
Work in process | $ 3,986 | $ 3,990
Raw materials | 1,587 | 1,712
Finished goods | 28 | 30
Pre-owned aircraft | 202 | 13
Total inventories | $ 5,803 | $ 5,745

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