Business Segments (Segment Reporting Information by Segment) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 27, 2024	Sep. 29, 2023	Sep. 27, 2024	Sep. 29, 2023
Segment Reporting Information [Line Items]
Total revenues	$ 4,190	$ 3,921	$ 12,297	$ 11,458
Total operating income (loss)	516	(336)	1,406	260
Corporate
Segment Reporting Information [Line Items]
Total operating income (loss)	(36)	(28)	(111)	(87)
National Security & Digital \| Operating Segments
Segment Reporting Information [Line Items]
Total revenues	1,865	1,852	5,471	5,400
Total operating income (loss)	187	170	545	487
Health & Civil \| Operating Segments
Segment Reporting Information [Line Items]
Total revenues	1,225	1,055	3,687	3,097
Total operating income (loss)	287	165	816	412
Commercial & International \| Operating Segments
Segment Reporting Information [Line Items]
Total revenues	578	552	1,648	1,588
Total operating income (loss)	41	(646)	64	(599)
Defense Systems \| Operating Segments
Segment Reporting Information [Line Items]
Total revenues	522	462	1,491	1,373
Total operating income (loss)	$ 37	$ 3	$ 92	$ 47

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details