Benefit Plans - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Apr. 29, 2022
Defined Benefit Plan Disclosure [Line Items]
Matching contribution	$ 0.2	$ 0.2	$ 0.8	$ 0.8
L3Harris Technologies, Inc.
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rate	4.40%		4.40%		4.40%