Cash and Cash Equivalents (Details) - USD ($) $ in Millions	Jul. 03, 2026	Jan. 02, 2026
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 312	$ 500
Cash and cash equivalents
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	239	425
Short-term investments
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	13	23
Short-term investments \| Aspire Defence Project
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	26	11
Cash and cash equivalents held in consolidated joint ventures and Aspire Defence subcontracting entities
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	60	52
International
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	237	290
International \| Wholly-Owned Captive Insurance Company
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	10	15
International \| Cash and cash equivalents
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	164	226
International \| Short-term investments
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	13	12
International \| Cash and cash equivalents held in consolidated joint ventures and Aspire Defence subcontracting entities
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	60	52
Domestic
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	75	210
Domestic \| Cash and cash equivalents
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	75	199
Domestic \| Short-term investments
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	0	11
Domestic \| Cash and cash equivalents held in consolidated joint ventures and Aspire Defence subcontracting entities
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 0	$ 0