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Segment Reporting Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 28, 2014 | Sep. 29, 2013 | Sep. 28, 2014 | Sep. 29, 2013
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Revenues | $ 7,751 |  | $ 7,735 |  | $ 22,490 |  | $ 22,883 |
Operating Earnings | 999 |  | 961 |  | 2,822 |  | 2,765 |
Aerospace |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Revenues | 2,289 |  | 2,152 |  | 6,409 |  | 5,983 |
Operating Earnings | 411 |  | 369 |  | 1,199 |  | 1,068 |
Combat Systems |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Revenues | 1,395 |  | 1,306 |  | 4,118 |  | 4,241 |
Operating Earnings | 232 |  | 228 |  | 591 |  | 658 |
Marine Systems |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Revenues | 1,820 |  | 1,697 |  | 5,272 |  | 5,082 |
Operating Earnings | 170 |  | 170 |  | 510 |  | 507 |
Information Systems and Technology |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Revenues | 2,247 |  | 2,580 |  | 6,691 |  | 7,577 |
Operating Earnings | 202 |  | 216 |  | 573 |  | 599 |
Corporate |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Revenues | 0 | [1] | 0 | [1] | 0 | [1] | 0 | [1]
Operating Earnings | $ (16) | [1] | $ (22) | [1] | $ (51) | [1] | $ (67) | [1]
[1] | *Corporate operating results consist primarily of stock option expense.

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