| **ACQUISITIONS, DIVESTITURES AND ASSET SALES - Narrative (Details) - USD ($) $ in Millions**                   |        |         |         |         | 3 Months Ended | 6 Months Ended |          |
|----------------------------------------------------------------------------------------------------------------|--------|---------|---------|---------|----------------|----------------|----------|
||
| **Business Acquisition [Line Items]**                                                                          |   |    |    |    |           |           |     |   |   |   |
| Goodwill                                                                                                       |   |    |    |    | $ 18,417       |           | $ 18,417 | $ 18,417 |   | $ 17,283 |
| Business divestiture-related gains, net                                                                        |   |    |    |    | 26             | $ 0            | 26       |   | $ 0 |   |
| Proceeds from sales of businesses, net                                                                         |   |    |    |    |           |           | 71       |   | 2 |   |
| CS                                                                                                             |   |    |    |    |           |           |     |   |   |   |
| **Business Acquisition [Line Items]**                                                                          |   |    |    |    |           |           |     |   |   |   |
| Goodwill                                                                                                       |   |    |    |    | 4,914          |           | 4,914    | 4,914 |   | $ 3,796 |
| Viasat TDL                                                                                                     |   |    |    |    |           |           |     |   |   |   |
| **Business Acquisition [Line Items]**                                                                          |   |    |    |    |           |           |     |   |   |   |
| Revenues                                                                                                       |   |    |    |    |           | 90             |     |   | 185 |   |
| Secured Debt | Term loan, due November 21, 2025 (“Term Loan 2025”)                                 |   |    |    |    |           |           |     |   |   |   |
| **Business Acquisition [Line Items]**                                                                          |   |    |    |    |           |           |     |   |   |   |
| Debt instrument term                                                                                           |   |    |    | 3 years |           |           |     |   |   |   |
| Secured Debt | Term loan, due November 21, 2025 (“Term Loan 2025”) | Line of Credit                |   |    |    |    |           |           |     |   |   |   |
| **Business Acquisition [Line Items]**                                                                          |   |    |    |    |           |           |     |   |   |   |
| Debt issued                                                                                                    |   |    |    | $ 2,250 | 2,250          |           | 2,250    | 2,250 |   |   |
| Disposal Group, Disposed of by Sale, Not Discontinued Operations | Visual Information Solutions (VIS) Business |   |    |    |    |           |           |     |   |   |   |
| **Business Acquisition [Line Items]**                                                                          |   |    |    |    |           |           |     |   |   |   |
| Cash price on sale of business                                                                                 |   |    |    |    | 70             |           | 70       | 70 |   |   |
| Business divestiture-related gains, net                                                                        | $ 26   |    |    |    |           |           |     |   |   |   |
| Proceeds from sales of businesses, net                                                                         | 71     |    |    |    |           |           |     |   |   |   |
| Disposal Group, Disposed of by Sale, Not Discontinued Operations | IMS Segment Business And Asset              |   |    |    |    |           |           |     |   |   |   |
| **Business Acquisition [Line Items]**                                                                          |   |    |    |    |           |           |     |   |   |   |
| Proceeds from sales of businesses, net                                                                         | $ 20   |    |    |    |           |           |     |   |   |   |
| Gain on sale of asset group                                                                                    |   |    |    |    |           |           | 8        |   |   |   |
| Tactical Data Links (TDL) Product Line                                                                         |   |    |    |    |           |           |     |   |   |   |
| **Business Acquisition [Line Items]**                                                                          |   |    |    |    |           |           |     |   |   |   |
| Purchase price                                                                                                 |   | $ 1,958 |    |    |           |           |     |   |   |   |
| Provision for loss on customer contracts                                                                       |   |    |    |    | 86             |           | 86       | 86 |   |   |
| Loss provision amortization expense                                                                            |   |    |    |    | 6              |           | 14       |   |   |   |
| Total liabilities assumed                                                                                      |   |    |    |    |           |           | 61       | 7 |   |   |
| Revenue from amortization of off-market contract liability                                                     |   |    |    |    | 6              |           | 15       |   |   |   |
| Future estimated revenue from the amortization of off-market contract liabilities, remainder of fiscal year    |   |    |    |    | 18             |           | 18       | 18 |   |   |
| Future estimated revenue from the amortization of off-market contract liabilities, year one                    |   |    |    |    | 21             |           | 21       | 21 |   |   |
| Goodwill                                                                                                       |   | $ 1,117 |    |    |           |           |     |   |   |   |
| Net revenues from acquiree for the reporting period                                                            |   |    |    |    | 83             |           | 164      |   |   |   |
| Earnings from acquiree for the reporting period                                                                |   |    |    |    | 22             | $ 20           | 48       |   | $ 25 |   |
| Acquisition related costs                                                                                      |   |    |    |    | 23             |           | 54       |   |   |   |
| Tactical Data Links (TDL) Product Line | CS                                                                    |   |    |    |    |           |           |     |   |   |   |
| **Business Acquisition [Line Items]**                                                                          |   |    |    |    |           |           |     |   |   |   |
| Goodwill                                                                                                       |   |    |    |    | $ 1,117        |           | 1,117    | $ 1,117 |   |   |
| Tactical Data Links (TDL) Product Line | Other Accrued Liabilities                                             |   |    |    |    |           |           |     |   |   |   |
| **Business Acquisition [Line Items]**                                                                          |   |    |    |    |           |           |     |   |   |   |
| Total liabilities assumed                                                                                      |   |    |    |    |           |           | 33       |   |   |   |
| Tactical Data Links (TDL) Product Line | Other Noncurrent Liabilities                                          |   |    |    |    |           |           |     |   |   |   |
| **Business Acquisition [Line Items]**                                                                          |   |    |    |    |           |           |     |   |   |   |
| Total liabilities assumed                                                                                      |   |    |    |    |           |           | $ 28     |   |   |   |
| Aerojet Rocketdyne Holdings, Inc.                                                                              |   |    |    |    |           |           |     |   |   |   |
| **Business Acquisition [Line Items]**                                                                          |   |    |    |    |           |           |     |   |   |   |
| Business combination, price of acquisition, expected                                                           |   |    | $ 4,700 |    |           |           |     |   |   |   |

| X                                                                                                                                                                                                                                                                                                                                                                                    |
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| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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| - Definition
This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.
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| - Definition
Purchase price of expected business acquisition prior to consideration being transferred. Excludes asset acquisition.
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| - Definition
This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.
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| - Definition
This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.
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| - Definition
Face (par) amount of debt instrument at time of issuance.
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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
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| - Definition
Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.
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| - Definition
Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.
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| - Definition
Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.
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| - Definition
Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.
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| - Definition
The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.
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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).
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