| **BUSINESS SEGMENT INFORMATION - Revenues and Income From Continuing Operations by Segment (Details) - USD ($) $ in Millions** | 3 Months Ended | 6 Months Ended |
|--------------------------------------------------------------------------------------------------------------------------------|----------------|----------------|
||
| **Segment Reporting Information [Line Items]**                                                                                 |           |           |   |   |
| Revenue from product sales and services                                                                                        | $ 4,135        | $ 4,668        | $ 8,238 | $ 9,235 |
| **Unallocated Items:**                                                                                                         |           |           |   |   |
| Unallocated corporate department income (expense), net(1)                                                                      | 17             | (23)           | 14 | (54) |
| L3Harris Merger-related transaction, integration and other expenses and losses                                                 | (26)           | (21)           | (49) | (44) |
| Amortization of acquisition-related intangibles                                                                                | (151)          | (156)          | (303) | (320) |
| Business divestiture-related gains, net                                                                                        | 0              | 180            | 0 | 165 |
| Impairment of goodwill and other assets                                                                                        | 0              | (63)           | 0 | (125) |
| Gain on sale of asset group                                                                                                    | 8              | 0              | 8 | 0 |
| Other divestiture-related expenses                                                                                             | (35)           | (49)           | (37) | (56) |
| FAS/CAS operating adjustment                                                                                                   | 21             | 30             | 43 | 60 |
| Total unallocated expenses                                                                                                     | (166)          | (102)          | (324) | (374) |
| Non-operating income                                                                                                           | 108            | 86             | 214 | 203 |
| Net interest expense                                                                                                           | (67)           | (65)           | (135) | (131) |
| Income from continuing operations before income taxes                                                                          | 525            | 582            | 1,061 | 1,109 |
| Accrual for value added tax obligation                                                                                         |           |           |   | 15 |
| FAS pension service cost                                                                                                       | (12)           | (18)           | (23) | (37) |
| Less: CAS pension cost                                                                                                         | (33)           | (48)           | (66) | (97) |
| FAS/CAS operating adjustment                                                                                                   | 21             | 30             | 43 | 60 |
| Non-service FAS pension income                                                                                                 | 111            | 111            | 221 | 222 |
| Net FAS/CAS pension adjustment                                                                                                 | 132            | 141            | 264 | 282 |
| Pension                                                                                                                        |           |           |   |   |
| **Unallocated Items:**                                                                                                         |           |           |   |   |
| Income (loss) from deferred compensation plans                                                                                 | 10             | (8)            | 10 | (8) |
| Intellectual Property                                                                                                          |           |           |   |   |
| **Unallocated Items:**                                                                                                         |           |           |   |   |
| Income from sale of intellectual property                                                                                      | 7              |           | 7 |   |
| Operating segments                                                                                                             |           |           |   |   |
| **Income from Continuing Operations before Income Taxes**                                                                      |           |           |   |   |
| Segment Operating Income:                                                                                                      | 650            | 663            | 1,306 | 1,411 |
| Operating segments | Integrated Mission Systems                                                                                |           |           |   |   |
| **Segment Reporting Information [Line Items]**                                                                                 |           |           |   |   |
| Revenue from product sales and services                                                                                        | 1,673          | 1,792          | 3,394 | 3,543 |
| **Income from Continuing Operations before Income Taxes**                                                                      |           |           |   |   |
| Segment Operating Income:                                                                                                      | 217            | 142            | 472 | 376 |
| Operating segments | Space & Airborne Systems                                                                              |           |           |   |   |
| **Segment Reporting Information [Line Items]**                                                                                 |           |           |   |   |
| Revenue from product sales and services                                                                                        | 1,498          | 1,510          | 2,948 | 2,970 |
| **Income from Continuing Operations before Income Taxes**                                                                      |           |           |   |   |
| Segment Operating Income:                                                                                                      | 195            | 204            | 367 | 396 |
| Operating segments | Communication Systems                                                                                     |           |           |   |   |
| **Segment Reporting Information [Line Items]**                                                                                 |           |           |   |   |
| Revenue from product sales and services                                                                                        | 993            | 1,127          | 1,956 | 2,239 |
| **Income from Continuing Operations before Income Taxes**                                                                      |           |           |   |   |
| Segment Operating Income:                                                                                                      | 238            | 276            | 467 | 546 |
| Other non-reportable businesses                                                                                                |           |           |   |   |
| **Segment Reporting Information [Line Items]**                                                                                 |           |           |   |   |
| Revenue from product sales and services                                                                                        | 0              | 282            | 0 | 566 |
| **Income from Continuing Operations before Income Taxes**                                                                      |           |           |   |   |
| Segment Operating Income:                                                                                                      | 0              | 41             | 0 | 93 |
| Corporate                                                                                                                      |           |           |   |   |
| **Segment Reporting Information [Line Items]**                                                                                 |           |           |   |   |
| Revenue from product sales and services                                                                                        | $ (29)         | $ (43)         | $ (60) | $ (83) |

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Impairment Of Long Lived Assets To Be Disposed Of And Goodwill Impairment Charges
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Non-Operating Pension Income (Expense)
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Revenue and income from continuing operations before income taxes by segment
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Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.
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Amount of gain (loss) on sale or disposal of intangible assets.
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Amount of gain (loss) on sale or disposal of other assets.
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| - Definition
Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.
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The net amount of operating interest income (expense).
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The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).
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| - Definition
The net result for the period of deducting operating expenses from operating revenues.
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| - Definition
Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.
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