Acquisitions, Goodwill and Intangible Assets (Changes in Goodwill by Segment) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Apr. 03, 2026	Jan. 02, 2026
Goodwill [Roll Forward]
Beginning balance, goodwill	$ 6,342	$ 6,084
Acquisition of a business	1,748	231
Divestiture of a business		(7)
Foreign currency translation adjustments	4	34
Ending balance, goodwill	8,094	6,342
Intelligence & Digital
Goodwill [Roll Forward]
Beginning balance, goodwill	2,238	2,007
Acquisition of a business	0	231
Divestiture of a business		0
Foreign currency translation adjustments	0	0
Ending balance, goodwill	2,238	2,238
Health
Goodwill [Roll Forward]
Beginning balance, goodwill	1,336	1,336
Acquisition of a business	0	0
Divestiture of a business		0
Foreign currency translation adjustments	0	0
Ending balance, goodwill	1,336	1,336
Homeland
Goodwill [Roll Forward]
Beginning balance, goodwill	977	950
Acquisition of a business	1,748	0
Divestiture of a business		(7)
Foreign currency translation adjustments	4	34
Ending balance, goodwill	2,729	977
Accumulated goodwill impairment losses	596
Defense
Goodwill [Roll Forward]
Beginning balance, goodwill	1,791	1,791
Acquisition of a business	0	0
Divestiture of a business		0
Foreign currency translation adjustments	0	0
Ending balance, goodwill	$ 1,791	$ 1,791

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