Acquisitions and Goodwill (Rollforward of Goodwill by Segments) (Details) - USD ($)
|
3 Months Ended |
9 Months Ended |
|
Apr. 03, 2016 |
Oct. 02, 2016 |
Dec. 31, 2015 |
| Goodwill [Roll Forward] |
|
|
|
| Beginning balance |
$ 14,731,000,000
|
$ 14,731,000,000
|
|
| Acquisitions(3) |
|
59,000,000
|
|
| Effect of foreign exchange rates and other |
|
1,000,000
|
|
| Ending balance |
|
14,791,000,000
|
|
| Integrated Defense Systems |
|
|
|
| Goodwill [Roll Forward] |
|
|
|
| Beginning balance |
1,704,000,000
|
1,704,000,000
|
|
| Acquisitions(3) |
|
0
|
|
| Effect of foreign exchange rates and other |
|
0
|
|
| Ending balance |
|
1,704,000,000
|
|
| Intelligence, Information and Services |
|
|
|
| Goodwill [Roll Forward] |
|
|
|
| Beginning balance |
2,958,000,000
|
2,958,000,000
|
|
| Acquisitions(3) |
|
8,000,000
|
|
| Effect of foreign exchange rates and other |
|
1,000,000
|
|
| Ending balance |
|
2,967,000,000
|
|
| Goodwill allocated to IIS from IDS |
|
|
$ 90,000,000
|
| Missile Systems |
|
|
|
| Goodwill [Roll Forward] |
|
|
|
| Beginning balance |
4,154,000,000
|
4,154,000,000
|
|
| Acquisitions(3) |
|
0
|
|
| Effect of foreign exchange rates and other |
|
0
|
|
| Ending balance |
|
4,154,000,000
|
|
| Space and Airborne Systems |
|
|
|
| Goodwill [Roll Forward] |
|
|
|
| Beginning balance |
4,106,000,000
|
4,106,000,000
|
|
| Acquisitions(3) |
|
0
|
|
| Effect of foreign exchange rates and other |
|
0
|
|
| Ending balance |
|
4,106,000,000
|
|
| Forcepoint |
|
|
|
| Goodwill [Roll Forward] |
|
|
|
| Beginning balance |
1,809,000,000
|
1,809,000,000
|
|
| Acquisitions(3) |
|
51,000,000
|
|
| Effect of foreign exchange rates and other |
|
0
|
|
| Ending balance |
|
1,860,000,000
|
|
| Estimated fair value in excess of book value |
|
$ 480,000,000
|
|
| Foreground Security [Member] |
|
|
|
| Goodwill [Roll Forward] |
|
|
|
| Goodwill, Purchase Accounting Adjustments |
$ 8,000,000
|
|
|