| **Business Combinations Textual (Details) - USD ($) $ in Millions**                   |         | 12 Months Ended |
|---------------------------------------------------------------------------------------|---------|-----------------|
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| **Business Acquisition [Line Items]**                                                 |    |            |   |   |
| Cash paid for acquired businesses                                                     |    | $ 0             | $ 3,186 | $ 0 |
| Notes payable                                                                         |    | 618             | 1,268 |   |
| Severance Costs                                                                       |    |            | $ 65 |   |
| Fixed Rate Debt Securities                                                            |    |            |   |   |
| **Business Acquisition [Line Items]**                                                 |    |            |   |   |
| Notes payable                                                                         |    | 2,400           |   |   |
| Exelis                                                                                |    |            |   |   |
| **Business Acquisition [Line Items]**                                                 |    |            |   |   |
| Percent of Exelis owned by Harris Corporation                                         | 100.00% |            |   |   |
| Business Combination, Consideration Transferred                                       | $ 4,709 |            |   |   |
| Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | 1,527   |            |   |   |
| Cash paid for acquired businesses                                                     | $ 3,182 |            |   |   |
| Approximate ownership retained by acquirer                                            | 84.00%  |            |   |   |
| Ownership Transferred During Acquisition                                              | 16.00%  |            |   |   |
| Goodwill                                                                              |    | 40              |   |   |
| Severance payment obligation liability                                                |    | 21              |   |   |
| Severance Costs                                                                       |    | $ 32            |   |   |
| Exelis | Variable Rate Term Loan Agreement                                            |    |            |   |   |
| **Business Acquisition [Line Items]**                                                 |    |            |   |   |
| Long-term Debt, Gross                                                                 | $ 1,300 |            |   |   |
| Exelis | Fixed Rate Debt Securities                                                   |    |            |   |   |
| **Business Acquisition [Line Items]**                                                 |    |            |   |   |
| Notes payable                                                                         | $ 2,400 |            |   |   |

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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
Percentage of voting equity interests acquired at the acquisition date in the business combination.
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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.
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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.
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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.
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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.
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Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.
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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.
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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.
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