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Contracts in Process - Components of Contracts in Process (Detail) - USD ($)
$ in Millions
Mar. 25, 2016
Dec. 31, 2015
Components of contracts in process    
Unbilled contract receivables, gross $ 2,243 $ 2,097
Unliquidated progress payments (977) (869)
Unbilled contract receivables, net 1,266 1,228
Inventoried contract costs, gross 1,097 975
Unliquidated progress payments (137) (122)
Inventoried contract costs, net 960 853
Total contracts in process $ 2,226 $ 2,081