GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) $ in Millions	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 29, 2023 USD ($)	Mar. 31, 2023 unit	Sep. 30, 2022 USD ($)	Sep. 29, 2023 USD ($) unit	Sep. 30, 2022 USD ($)	Dec. 30, 2022 USD ($)	Jul. 28, 2023 USD ($)	Jan. 03, 2023 USD ($)
Finite-Lived Intangible Assets [Line Items]
Number of reporting units | unit		9		8
Reallocation of goodwill in business realignment				$ 0
Goodwill	$ 20,736			20,736		$ 17,283
Amortization of acquisition-related intangibles	208		$ 151	546	$ 454
ADG Reporting Unit
Finite-Lived Intangible Assets [Line Items]
Reallocation of goodwill in business realignment			(367)		(367)
Impairment of goodwill						313
Broadband Communications Reporting Unit
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill						355
Electro Optical Reporting Unit
Finite-Lived Intangible Assets [Line Items]
Reallocation of goodwill in business realignment			$ (80)		$ (80)
Impairment of goodwill						134
Tactical Data Links (TDL) Product Line
Finite-Lived Intangible Assets [Line Items]
Goodwill								$ 1,117
Aerojet Rocketdyne Holdings, Inc.
Finite-Lived Intangible Assets [Line Items]
Goodwill							$ 2,348
SAS
Finite-Lived Intangible Assets [Line Items]
Reallocation of goodwill in business realignment				327
Goodwill	6,091			6,091		5,778
CS
Finite-Lived Intangible Assets [Line Items]
Reallocation of goodwill in business realignment				0
Goodwill	4,913			4,913		$ 3,796
CS | Tactical Data Links (TDL) Product Line
Finite-Lived Intangible Assets [Line Items]
Goodwill	1,117			1,117
Discontinued Operations, Disposed of by Means Other than Sale, Abandonment | Open Water Power Facility | In-process research and development
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets	$ 21			$ 21