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Significant Accounting Policies and Recent Accounting Standards (Details) $ in Millions |  |  |  | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
May 04, 2020 USD ($) | Sep. 13, 2019 USD ($) | Jun. 29, 2019 | Jul. 03, 2020 USD ($) | Jun. 28, 2019 USD ($) | May 15, 2020 USD ($) | Mar. 20, 2020 USD ($)
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Cash proceeds from sale of business, after selling costs and estimated price adjustments |  |  |  | $ 963 | $ 0 |  |
Airport Security and Automation Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Aviation Systems |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Cash price on sale of business | $ 1,000 |  |  |  |  |  |
Cash proceeds from sale of business, after selling costs and estimated price adjustments | $ 951 |  |  |  |  |  |
Applied Kilovolts and Analytical Instrumentation Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Space and Airborne Systems |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Cash price on sale of business |  |  |  |  |  | $ 12 |
EOTech Business | Disposal Group, Held-for-sale, Not Discontinued Operations | Communication Systems |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Cash price on sale of business |  |  |  |  |  |  | $ 42
L3Harris |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Exchange ratio |  |  | 1.30 |  |  |  |
L3Harris | Harris Night Vision | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Cash proceeds from sale of business, after selling costs and estimated price adjustments |  | $ 343 |  |  |  |  |
L3Harris | Harris Night Vision | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Other non-reportable business segments |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Cash price on sale of business |  | $ 350 |  |  |  |  |
L3Harris | Former Harris shareholders |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Percentage of voting interests acquired |  |  | 54.00% |  |  |  |
L3Harris | Former L3 shareholders |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Percentage of voting interests acquired |  |  | 46.00% |  |  |  |

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