Business Combination - Additional Information (Details) - L3Harris $ / shares in Units, shares in Thousands, employee in Thousands, $ in Millions		3 Months Ended	6 Months Ended
	Jun. 29, 2019 USD ($) employee $ / shares shares	Jul. 03, 2020 USD ($)	Jul. 03, 2020 USD ($)	Jan. 03, 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		$ 17	$ 40	$ 13
Amortization of off-market contract liabilities to be recognized as revenue in the remainder of 2020		18	18
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%