Subsequent Events (Details) - Subsequent Event employee in Thousands, $ in Billions		12 Months Ended
	Oct. 12, 2018 employee day	Dec. 31, 2018 USD ($)
L3 Technologies, Inc.
Subsequent Event [Line Items]
Entity number of employees | employee	31
Scenario, Forecast | L3 Technologies, Inc.
Subsequent Event [Line Items]
Revenue | $		$ 10
Scenario, Forecast | L3 Harris Technologies, Inc.
Subsequent Event [Line Items]
Fixed exchange conversion ratio per share	1.30
Number of trading days average exchange ratio | day	60
Scenario, Forecast | L3 Harris Technologies, Inc. | Former Harris Shareholders
Subsequent Event [Line Items]
Percentage of voting interests acquired	54.00%
Scenario, Forecast | L3 Harris Technologies, Inc. | Former L3 Shareholders
Subsequent Event [Line Items]
Percentage of voting interests acquired	46.00%