GOODWILL - Changes in Carrying Amount of Goodwill (Details)		12 Months Ended
	Jun. 29, 2019 USD ($)	Dec. 31, 2021 USD ($) divestiture	Jan. 01, 2021 USD ($) divestiture	Jun. 28, 2019 business
Goodwill [Roll Forward]
Beginning Balance		$ 18,876,000,000	$ 20,001,000,000
Goodwill decrease from divestitures		(564,000,000)	(541,000,000)
Impairment of goodwill	$ 0	(62,000,000)	(480,000,000)
Currency translation adjustments		(61,000,000)	(14,000,000)
Other (including adjustments to previously estimated fair value of assets acquire and liabilities assumed)			(90,000,000)
Ending Balance		$ 18,189,000,000	$ 18,876,000,000
Number of business divested | business				0
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Goodwill [Roll Forward]
Number of business divested | divestiture		6	3
Applied Kilovolts And Analytical Instrumentation, Airport Security And Automation And EOTech Businesses | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Goodwill [Roll Forward]
Number of business divested | divestiture		6	3
CPS business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Goodwill [Roll Forward]
Impairment of goodwill		$ (62,000,000)
Integrated Mission Systems
Goodwill [Roll Forward]
Beginning Balance		6,499,000,000	$ 5,768,000,000
Goodwill decrease from divestitures		0	0
Impairment of goodwill		0	0
Currency translation adjustments		(14,000,000)	(10,000,000)
Other (including adjustments to previously estimated fair value of assets acquire and liabilities assumed)			741,000,000
Ending Balance		6,485,000,000	6,499,000,000
Space & Airborne Systems
Goodwill [Roll Forward]
Beginning Balance		5,232,000,000	5,131,000,000
Goodwill decrease from divestitures		0	(2,000,000)
Impairment of goodwill		0	(5,000,000)
Currency translation adjustments		(30,000,000)	(4,000,000)
Other (including adjustments to previously estimated fair value of assets acquire and liabilities assumed)			112,000,000
Ending Balance		5,202,000,000	5,232,000,000
Communication Systems
Goodwill [Roll Forward]
Beginning Balance		4,153,000,000	4,243,000,000
Goodwill decrease from divestitures		0	(9,000,000)
Impairment of goodwill		0	0
Currency translation adjustments		0	1,000,000
Other (including adjustments to previously estimated fair value of assets acquire and liabilities assumed)			(82,000,000)
Ending Balance		4,153,000,000	4,153,000,000
Aviation Systems
Goodwill [Roll Forward]
Beginning Balance		2,992,000,000	4,859,000,000
Goodwill decrease from divestitures		(564,000,000)	(530,000,000)
Impairment of goodwill		(62,000,000)	(475,000,000)
Currency translation adjustments		(17,000,000)	(1,000,000)
Other (including adjustments to previously estimated fair value of assets acquire and liabilities assumed)			(861,000,000)
Ending Balance		$ 2,349,000,000	$ 2,992,000,000