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Changes In Amount Of Goodwill (Detail) (USD $) In Millions, unless otherwise specified | 9 Months Ended |
--- | --- | ---
Sep. 28, 2014 | Dec. 31, 2013
Goodwill [Roll Forward] |  |  |
Goodwill, beginning of period | $ 11,932 | [1] |
Other | (176) | [2] |
Goodwill, end of period | 11,756 |  |
Aerospace |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, beginning of period | 2,741 | [1] |
Other | (104) | [2] |
Goodwill, end of period | 2,637 |  |
Combat Systems |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, beginning of period | 2,849 | [1] |
Other | (59) | [2] |
Goodwill, end of period | 2,790 |  |
Marine Systems |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, beginning of period | 289 | [1] |
Other | 0 | [2] |
Goodwill, end of period | 289 |  |
Information Systems and Technology |  |  |
Goodwill [Line Items] |  |  |
Goodwill, Impaired, Accumulated Impairment Loss |  |  | 1,994
Goodwill [Roll Forward] |  |  |
Goodwill, beginning of period | 6,053 | [1] |
Other | (13) | [2] |
Goodwill, end of period | $ 6,040 |  |
[1] | Goodwill on December 31, 2013, in the Information Systems and Technology reporting unit is net of $1,994 of accumulated impairment losses.
[2] | Consists primarily of adjustments for foreign currency translation.

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