| **Income From Continuing Operations Per Share (Tables)**                                    | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
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| **Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| Income from continuing operations per share                                                 | The computations of income from continuing operations per share are as follows (in this Note 16, “income from continuing operations” refers to income from continuing operations attributable to Harris Corporation common shareholders): 2016 2015 2014       (In millions, except per share amounts)Income from continuing operations$345 $334 $540Adjustments for participating securities outstanding(1) (1) (4)Income from continuing operations used in per basic and diluted common share calculations (A)$344 $333 $536Basic weighted average common shares outstanding (B)123.8 105.7 106.1Impact of dilutive share-based awards1.2 1.1 1.2Diluted weighted average common shares outstanding (C)125.0 106.8 107.3Income from continuing operations per basic common share (A)/(B)$2.77 $3.15 $5.05Income from continuing operations per diluted common share (A)/(C)$2.75 $3.11 $5.00 |

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