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INVENTORIES, NET (Tables)
 9 Months Ended
Sep. 24, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventories, Net
Inventories, net consisted of the following (in millions):
  
 
September 24,
2017
 
December 31,
2016
Work-in-process, primarily related to long-term contracts and programs in progress
 
$
7,720

 
 
$
7,864

 
Spare parts, used aircraft and general stock materials
 
798

 
 
833

 
Other inventories
 
767

 
 
719

 
Total inventories
 
9,285

 
 
9,416

 
Less: customer advances and progress payments
 
(4,482
)
 
 
(4,746
)
 
Total inventories, net
 
$
4,803

 
 
$
4,670