BUSINESS DIVESTITURES AND ASSET SALES - Sale Price and Net Cash Proceeds of Completed Divestitures (Details) - Disposal Group, Disposed of by Sale, Not Discontinued Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Jan. 01, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price	$ 1,783	$ 1,054
Net Cash Proceeds	1,727	1,039
Narda-MITEQ business | Other Non-Reportable Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price	75
Net Cash Proceeds	76
ESSCO business | Other Non-Reportable Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price	55
Net Cash Proceeds	53
Electron Devices business | Other Non-Reportable Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price	185
Net Cash Proceeds	173
VSE disposal group | Other Non-Reportable Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price	20
Net Cash Proceeds	19
CPS business | Other Non-Reportable Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price	398
Net Cash Proceeds	347
Military training business | Other Non-Reportable Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price	1,050
Net Cash Proceeds	$ 1,059
EOTech | Communication Systems
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price		42
Net Cash Proceeds		40
Applied Kilovolts and Analytical Instrumentation Business | Space & Airborne Systems
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price		12
Net Cash Proceeds		12
Airport security and automation business | Other Non-Reportable Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price		1,000
Net Cash Proceeds		$ 987