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Inventories
 9 Months Ended
Sep. 30, 2024
Inventories [Abstract]  
Inventories Inventories
September 30 2024December 31 2023
Work in progress$1,199 $1,005 
Raw materials and supplies747 625 
Inventory reserves(144)(143)
Total$1,802 $1,487 
The following table presents the movement in the inventory reserves for the nine months ended September 30, 2024 and for the twelve months ended December 31, 2023, respectively:

September 30 2024December 31 2023
Beginning balance$143 $115 
Additions
127 104 
Written-off and scrapped(36)(31)
Elimination of reserves upon sale of inventory(90)(45)
Ending balance$144 $143