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Business Combination - Additional Information (Details) - L3Harris $ / shares in Units, shares in Thousands, employee in Thousands, $ in Millions |  | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 29, 2019 USD ($) employee $ / shares shares | Oct. 02, 2020 USD ($) | Jan. 03, 2020 USD ($) | Oct. 02, 2020 USD ($) | Jun. 28, 2019 $ / shares
Business Acquisition [Line Items] |  |  |  |  |
Exchange ratio | 1.30 |  |  |  |
Shares issued for total merger consideration (in shares) | shares | 104,100 |  |  |  |
Price per share of common stock (in dollars per share) | $ / shares | $ 189.13 |  |  |  | $ 189.13
Off-market contracts recorded as net liability | $ 139 |  |  |  |
Amortization of off-market contract liabilities recognized as revenue during current period |  | $ 11 | $ 13 | $ 51 |
Amortization of off-market contract liabilities to be recognized as revenue in the remainder of 2020 |  | 7 |  | 7 |
Amortization of off-market contract liabilities to be recognized as revenue in 2021 |  | 20 |  | 20 |
Amortization of off-market contract liabilities to be recognized as revenue in 2022 |  | 15 |  | 15 |
Amortization of off-market contract liabilities to be recognized as revenue in 2023 |  | 10 |  | 10 |
Amortization of off-market liabilities to be recognized as revenue thereafter |  | $ 23 |  | $ 23 |
L3 |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of employees | employee | 31 |  |  |  |
Shares issued for total merger consideration (in shares) | shares | 80,080 |  |  |  |
Former Harris shareholders |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percentage of voting interests acquired | 54.00% |  |  |  |
Former L3 shareholders |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percentage of voting interests acquired | 46.00% |  |  |  |

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