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Inventories - Narrative (Details) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Early Issue Sales Consideration          
Inventory [Line Items]          
Inventory subject to uncertainty $ 4,546   $ 4,126 $ 3,586  
Airplane Program 737          
Inventory [Line Items]          
Deferred production costs     6,011 2,955  
Unamortized tooling and other non-recurring costs 880   792 626  
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders at the balance sheet date 8,480   6,767    
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders 38   36    
Amount of deferred costs related to commercial aircraft programs 7,638   6,011    
Airplane Program 777x          
Inventory [Line Items]          
Deferred production costs     1,792 1,330  
Unamortized tooling and other non-recurring costs 4,218   4,063 3,774  
Inventory, work in process 6,072   4,638 4,059  
Abnormal production costs   $ 262 513 325  
Amount of deferred costs related to commercial aircraft programs 2,612   1,792    
Airplane Program 787          
Inventory [Line Items]          
Unamortized tooling and other non-recurring costs 1,441   1,480 1,722  
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from firm orders at the balance sheet date 11,618   12,384    
Deferred production, unamortized tooling and other nonrecurring costs to be recovered from future orders 2,159   1,480    
Abnormal production costs 157 $ 693 1,014 1,240 $ 468
Supplier advances 1,563   1,764 1,831  
Amount of deferred costs related to commercial aircraft programs $ 12,336   $ 12,384 $ 12,689