| **CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions**      | 6 Months Ended | 12 Months Ended |
|---------------------------------------------------------------------------------|----------------|-----------------|
||
| **Statement of Comprehensive Income [Abstract]**                                |           |            |   |   |
| Net income                                                                      | $ 834          | $ 949           | $ 699 | $ 543 |
| **Other comprehensive income (loss):**                                          |           |            |   |   |
| Foreign currency translation gain (loss), net of income taxes                   | 25             | (7)             | 15 | (34) |
| Net unrealized gain (loss) on hedging derivatives, net of income taxes          | (17)           | (18)            | 1 | 1 |
| Net unrecognized gain (loss) on postretirement obligations, net of income taxes | 178            | (480)           | 93 | 200 |
| Other comprehensive income (loss), net of income taxes                          | 186            | (505)           | 109 | 167 |
| Total comprehensive income                                                      | 1,020          | 444             | 808 | 710 |
| Comprehensive income attributable to noncontrolling interests                   | (12)           | 0               | 0 | 0 |
| Total comprehensive income attributable to L3Harris Technologies, Inc.          | $ 1,008        | $ 444           | $ 808 | $ 710 |

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.
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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.
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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.
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Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.
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