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STOCK OPTIONS AND OTHER SHARE-BASED COMPENSATION - Narrative (Details) shares in Millions, $ in Millions | 3 Months Ended
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Apr. 01, 2022 USD ($) plan shares | Apr. 02, 2021 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of shareholder approved employee stock incentive plans | plan | 2 |
L3Harris Shareholder-approved Employee Stock Incentive Plans |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share-based payment arrangement, expense | $ | $ 28 | $ 33
Common stock issued, net of shares withheld for tax purposes (in shares) | 0.4 | 0.1
Options granted (in shares) | 0.4 |
Performance Share Units | L3Harris Shareholder-approved Employee Stock Incentive Plans |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Equity instruments other than options granted (in shares) | 0.2 |
Restricted Stock Units | L3Harris Shareholder-approved Employee Stock Incentive Plans |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Equity instruments other than options granted (in shares) | 0.2 |
Stock Options | L3Harris Shareholder-approved Employee Stock Incentive Plans |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Expected dividend rate | 1.92% |
Expected volatility rate | 29.11% |
Risk free interest rate | 1.86% |
Expected term | 5 years 7 days |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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