Change in Estimate Under Percentage of Completion (Details) - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Oct. 02, 2016 |
Sep. 27, 2015 |
Oct. 02, 2016 |
Sep. 27, 2015 |
|
| Change in Accounting Estimate [Line Items] | ||||
| Operating income | $ 806 | $ 697 | $ 2,378 | $ 2,185 |
| Income from continuing operations attributable to Raytheon Company | $ 528 | $ 448 | $ 1,666 | $ 1,503 |
| Diluted earnings per share (EPS) from continuing operations attributable to Raytheon Company | $ 1.79 | $ 1.47 | $ 5.60 | $ 4.91 |
| Contracts Accounted for under Percentage of Completion [Member] | ||||
| Change in Accounting Estimate [Line Items] | ||||
| Operating income | $ 114 | $ 84 | $ 269 | $ 245 |
| Income from continuing operations attributable to Raytheon Company | $ 74 | $ 54 | $ 187 | $ 159 |
| Diluted earnings per share (EPS) from continuing operations attributable to Raytheon Company | $ 0.25 | $ 0.18 | $ 0.63 | $ 0.52 |