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Inventoried Costs, Net (Tables)
12 Months Ended
Dec. 31, 2021
Inventory Disclosure [Abstract]  
Inventoried Costs
Inventoried costs, net consisted of the following:
 December 31
$ in millions20212020
Contracts in process$478 $430 
Product inventory and raw material333 329 
Inventoried costs, net$811 $759