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Acquisitions, Goodwill and Intangible Assets (Narrative) (Details) - USD ($)		3 Months Ended		6 Months Ended
	May 23, 2025	Jul. 04, 2025	Jun. 28, 2024	Jul. 04, 2025	Jun. 28, 2024	Jan. 03, 2025	Dec. 29, 2023
Goodwill [Line Items]
Goodwill		$ 6,359,000,000		$ 6,359,000,000		$ 6,084,000,000	$ 6,112,000,000
Impairment of intangible assets		0	$ 0	0	$ 0
Amortization of intangible assets		32,000,000	$ 36,000,000	62,000,000	$ 73,000,000
National Security & Digital
Goodwill [Line Items]
Goodwill		3,002,000,000		3,002,000,000		$ 2,758,000,000	$ 2,758,000,000
Savanna Industries, Inc.
Goodwill [Line Items]
Purchase consideration	$ 291,000,000
Cash acquired	29,000,000
Goodwill	$ 244,000,000
Savanna Industries, Inc. | National Security & Digital
Goodwill [Line Items]
Revenues		$ 12,000,000		$ 12,000,000

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